Putnam ESG Core Bond ETF seeks high current income consistent with what Putnam Investment Management, LLC (“Putnam Management”) believes to be prudent risk.

Expense [Heading]

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Fees and expenses

Expense Narrative [Text Block]

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The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Operating Expenses Caption [Text]

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Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s portfolio turnover rate will be available after the fund completes its first fiscal year.

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.

Strategy [Heading]

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Principal investment strategies

Strategy Narrative [Text Block]

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The fund invests mainly in a diversified portfolio of investment-grade fixed-income securities with a focus on companies or issuers that Putnam Management, the fund’s investment manager, believes meet relevant environmental, social or governance (“ESG”) criteria on a sector-specific basis (“ESG criteria”).

The fund invests mainly in bonds of governments and private companies located in the United States that are investment-grade in quality with intermediate- to long-term maturities (three years or longer). Investment-grade securities are rated at least BBB or its equivalent at the time of purchase by a nationally recognized securities rating agency, or are unrated investments that Putnam Management believes are of comparable quality. Putnam Management may invest in below-investment-grade investments. However, Putnam Management will not invest in securities that are rated lower than B or its equivalent by each rating agency rating the investment, or are unrated securities that it believes are of comparable quality. The fund will not necessarily sell an investment if its rating is reduced (or increased) after purchase. The fund may also invest in foreign fixed income investments, although foreign investments do not represent a primary focus of the fund.

The fund may consider, among other factors, a company’s or issuer’s ESG criteria (as described below), credit, interest rate, liquidity and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Under normal circumstances, the fund invests at least 80% of the value of its net assets in fixed-income securities that meet Putnam Management’s ESG criteria. This policy is non-fundamental and may be changed only after 60 days’ notice to shareholders. Putnam Management may not apply ESG criteria to investments that are not subject to the fund’s 80% policy and such investments may not meet Putnam Management’s ESG criteria.

In evaluating investments for the fund, Putnam Management identifies relevant ESG criteria on a sector-specific basis using an internally developed materiality map, which is informed by the ESG issues identified by the Sustainability Accounting Standards Board as material to companies or issuers within a particular industry. A materiality map provides a guide to understanding which ESG criteria are more or less important for a given sector or subsector; it includes those ESG criteria that may be reasonably likely to influence investment decision-making. Putnam Management constructs the materiality map by evaluating the significance of specified ESG criteria (i.e., board structure and composition, diversity, equity and inclusion, or climate change risk, among others) in specific industries (i.e., consumer, healthcare, financials, etc.), subsectors, or countries. Putnam Management then categorizes the relevance of each ESG criteria for each industry, subsector, or country. As part of this analysis, Putnam Management may utilize metrics and information such as emissions data, carbon intensity, sources of energy used for operations, water use and re-use, water generation, waste diversion from landfill, employee safety and diversity data, supplier audits, product safety, board composition, and incentive compensation structures. After evaluating these criteria, Putnam Management will assign each company or issuer, as applicable, a proprietary ESG rating ranging from 1 to 4 (1 indicating the highest (best) ESG rating and 4 indicating the lowest (worst) ESG rating). In order to meet Putnam Management’s ESG criteria for purposes of the above-referenced non-fundamental investment policy, a company or issuer must be rated 2 or 1 by Putnam Management. While Putnam Management may consider independent third-party data as a part of its analytical process, the portfolio

management team performs its own independent analysis of issuers and does not rely solely on third-party screens.

The fund’s approach to ESG investing incorporates fundamental research together with consideration of ESG criteria which may include, but are not limited to, those included in the following descriptions. Environmental criteria include, for example, a company’s or issuer’s carbon intensity and use of resources like water or minerals. ESG measures in this area might include plans to reduce waste, increase recycling, raise the proportion of energy supply from renewable sources, or improve product design to be less resource intensive. Social criteria include, for example, labor practices and supply chain management. ESG measures in this area might include programs to improve employee well-being, commitment to workplace equality and diversity, or improved stewardship of supplier relationships and working conditions. Corporate governance criteria include, for example, board composition and executive compensation, as well as bondholders’ rights. ESG measures in this area might include improvements in board independence or diversity, or alignment of management incentives with the company’s or issuer’s strategic ESG objectives.

Putnam Management uses a sector-specific approach in evaluating investments. In the corporate credit sector, Putnam Management combines fundamental analysis with relevant ESG insights with a forward-looking perspective. Putnam Management believes that this approach contributes to a more nuanced assessment of an issuer’s credit profile which offers potential opportunity to limit tail risk in credit portfolios (i.e., the risk that the price of a portfolio may decrease by more than three standard deviations from its current price) and ratings volatility. Putnam Management believes that securitized debt instruments present unique challenges in applying ESG criteria due to the presence of various asset types, counterparties involved, and the complex structure of the securitized debt market along with a lack of available ESG-related data. In evaluating securitized debt instruments for potential investment, Putnam Management takes a broad approach, analyzing both the terms of the transaction, including the asset type being securitized and structure of securitization, as well as key counterparties. Opportunities are analyzed at the asset level within each securitization and each subsector to identify assets that meet relevant ESG thresholds. Additionally, in evaluating securitized debt instruments, Putnam Management analyzes relevant ESG criteria regarding the originator, servicers, or other relevant counterparties. In the sovereign debt sector, Putnam Management uses quantitative modeling and fundamental research to evaluate countries across a variety of ESG criteria (i.e., natural resource dependence and level of public corruption) and non-ESG criteria (i.e., global economic conditions, market valuations and technicals). Putnam Management believes that sovereign issuers with better ESG scores generally benefit from lower borrowing costs and that ESG criteria may influence the perception of the credit risk of a country’s debt. Countries are evaluated both on current ESG metrics and the extent of recent progress.

Putnam Management evaluates ESG considerations using independent third-party data (where available), and also uses company or issuer disclosures and public data sources. Putnam Management believes that ESG considerations are best analyzed in combination with a company’s or issuer’s fundamentals, including a company’s or issuer’s industry, location, strategic position, and key relationships.

In addition to bonds, the fund may also invest in other fixed-income instruments. In addition to the main investment strategies described above, the fund may make other types of investments, such as assignments of and participations in fixed and floating rate bank loans, investments in hybrid and structured bonds and notes, and preferred securities that would be characterized as debt securities under applicable accounting standards and tax laws. The fund may also use derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.

Risk [Heading]

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Principal investment risks

Risk Narrative [Text Block]

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ESG investing risk. Investing with a focus on companies or issuers that meet Putnam Management's ESG criteria may result in the fund investing in certain types of companies, issuers, industries or sectors that the market may not favor. Conversely, investing in such companies or issuers may result in the fund foregoing investment in securities that outperform the fund’s investments in certain environments. In evaluating an investment opportunity, Putnam Management may make investment decisions without the availability of optimal ESG-related data (which may be even less available with securitized debt instruments) or based on information and data that is incomplete or inaccurate. ESG metrics are not uniformly defined and applying such metrics involves subjective assessments. ESG scorings and assessments of issuers can vary across third-party data providers and may change over time. Putnam Management does not rely exclusively on third-party data providers in evaluating ESG criteria. ESG information from third-party data providers may be incomplete, inaccurate or unavailable, particularly with respect to companies in emerging market countries, which may adversely impact the investment process. The fund does not restrict its investments to “green bonds” (i.e., U.S. dollar-denominated bonds designated as “green” by the Climate Bonds Initiative) and does not restrict investments based solely on “negative screens”. In addition, a company’s or issuer’s business practices, products or services may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent with the fund’s ESG investment criteria. Regulatory changes or interpretations regarding the definitions and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies include ESG criteria. Because fixed-income investments generally represent a promise to pay principal and interest by an issuer, and not an ownership interest, and may involve complex structures, ESG-related investment considerations may have a more limited impact on risk and return (or may have an impact over a different investment time horizon) relative to other asset classes, and this may be particularly true for shorter-term investments. In addition, holders of fixed-income investments do not typically have voting rights, unlike holders of equity investments who have the right to vote on issuer proposals.

Model Risk. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. Additionally, market movements are likely to change the risk levels and risk allocations of the fund. Investments made based on quantitative models may perform differently from the market as a whole.

Fluctuation of NAV and share price risk. Shares may trade at a larger premium or discount to NAV than shares of other ETFs. The NAV of the fund will generally fluctuate with changes in the market value of the fund’s holdings. The fund’s shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund’s shares may result in the fund’s shares trading significantly above (at a premium) or below (at a discount) NAV or the intraday value of the fund’s holdings. In addition, in stressed market conditions or periods of market disruption or volatility, the market for fund shares may become less liquid in response to deteriorating liquidity in the markets for the fund’s underlying portfolio holdings.

Trading issues risk. The fund has no public trading history. There can be no assurance that an active trading market will develop or be maintained or that the market for fund shares will operate as intended, which could lead to the fund’s shares trading at wider spreads and larger premiums and discounts to NAV than other actively managed ETFs. As a result, it may cost investors more to trade fund shares than shares of other ETFs. There is no guarantee that the fund will be able to attract market makers and authorized participants. Market makers and authorized participants are not obligated to make a market in the fund’s shares or to submit purchase and redemption orders for creation units. The market prices of the fund’s shares are expected to fluctuate, in some cases materially, in response to changes in the fund’s NAV, the intraday value of the Fund’s holdings and supply and demand for the fund’s shares. Putnam Management cannot predict whether the fund’s shares will trade above, below or at their NAV or the intraday value of the fund’s holdings. During such periods, investors may incur significant losses if they sell shares.

The securities held by the fund may be traded in markets that close at a different time than the exchange on which the fund’s shares are listed. Liquidity in those securities may be reduced after the applicable closing times. Accordingly, during the time when the exchange is open but after the applicable market closing, fixing or settlement times, bid-ask spreads on the exchange and the corresponding premium or discount to the shares’ NAV may widen.

Large shareholder risk. Certain accounts or affiliates of Putnam Management, including other funds advised by Putnam Management or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets to the extent such transactions are executed directly with the fund in the form of redemptions through an authorized participant, rather than executed in the secondary market.

These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. To the extent these large shareholders transact in shares of the fund on the secondary market, such transactions may account for a large percentage of the trading volume on the exchange and may, therefore, have a material effect (upward or downward) on the market price of the fund’s shares.

Authorized participant concentration risk. Only an authorized participant may engage in creation and redemption transactions directly with the fund. The fund may have a limited number of financial institutions that act as authorized participants, none of which are obligated to engage in creation and/ or redemption transactions. To the extent that those authorized participants do not engage in creation and redemption orders, there may be a significantly diminished trading market for fund shares or fund shares may trade at a discount (or premium) to NAV and possibly face trading halts and/or de-listing.

Cash transactions risk. Unlike certain ETFs, the fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in the fund’s shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Market risk. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The novel coronavirus (“COVID-19”) pandemic and efforts to contain its spread are likely to negatively affect the value, volatility, and liquidity of the securities and other assets in which the fund invests and exacerbate other risks that apply to the fund. These effects could negatively impact the fund’s performance and lead to losses on your investment in the fund.

Fixed-income investments risk. The risks associated with fixed-income investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Fixed-income investments are also subject to credit risk, which is the risk that the issuer of a fixed-income investment may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally greater for longer-term debt. Fixed-income investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. The fund may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage-backed securities, and in certain other securities and derivatives, may be or become illiquid. The fund’s

investments in mortgage-backed securities may make the fund’s net asset value more susceptible to economic, market, political and other developments affecting the residential and commercial real estate markets and the servicing of mortgage loans secured by real estate properties. During periods of difficult economic conditions, delinquencies and losses on commercial mortgage-backed investments in particular generally increase, including as a result of the effects of those conditions on commercial real estate markets, the ability of commercial tenants to make loan payments, and the ability of a property to attract and retain commercial tenants.

Derivatives risk. The fund’s use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failure), and legal risk (e.g., insufficient legal documentation or contract enforceability issues).

Portfolio turnover rate risk. From time to time the fund may engage in frequent trading. Funds with high turnover may be more likely to realize capital gains that must be distributed to shareholders as taxable income. High turnover may also cause a fund to pay more brokerage commissions and to incur other transaction costs (including imputed transaction costs), which may detract from performance. The fund’s portfolio turnover rate and the amount of brokerage commissions it pays and transaction costs it incurs will vary over time based on market conditions.

Management and operational risk. There is no guarantee that the investment techniques, analyses, or judgments that Putnam Management applies in making investment decisions for the fund will produce the intended outcome or that the investments Putnam Management selects for the fund will perform as well as other securities that were not selected for the fund. Putnam Management, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program.

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. It is important to understand that you can lose money by investing in the fund.

Risk Lose Money [Text]

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It is important to understand that you can lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

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Performance information will be available after the fund completes a full calendar year of operation.

Putnam ESG Core Bond ETF | C000237594

Prospectus [Line Items]

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Management Fees (as a percentage of Assets)

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0.35%

Distribution and Service (12b-1) Fees

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none

Other Expenses (as a percentage of Assets):

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none

^[1]

Expenses (as a percentage of Assets)

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0.35%

Expense Example, with Redemption, 1 Year

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$ 36

Expense Example, with Redemption, 3 Years

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$ 113

Putnam ESG High Yield ETF

Prospectus [Line Items]

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Objective [Heading]

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Investment objective

Objective, Primary [Text Block]

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Putnam ESG High Yield ETF seeks high current income. Capital growth is a secondary goal when consistent with achieving high current income.

Expense [Heading]

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Fees and expenses

Expense Narrative [Text Block]

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Operating Expenses Caption [Text]

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Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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Strategy [Heading]

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Principal investment strategies

Strategy Narrative [Text Block]

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The fund invests mainly in bonds that are below investment grade in quality (sometimes referred to as “junk bonds”) with a focus on companies or issuers that Putnam Investment Management, LLC (“Putnam Management”), the fund’s investment manager, believes meet relevant environmental, social or governance (“ESG”) criteria on a sector-specific basis (“ESG criteria”). The fund invests mainly in

bonds that also have one or more of the following characteristics: (1) are obligations of U.S. companies or issuers and (2) have intermediate- to long-term maturities (three years or longer). The fund invests with a focus on companies or issuers that Putnam Management believes meet relevant environmental, social or governance (“ESG”) criteria on a sector-specific basis (“ESG criteria”). The fund may consider, among other factors, a company’s or issuer’s ESG criteria (as described below), credit, interest rate, liquidity and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Under normal circumstances, the fund invests at least 80% of the value of its net assets in fixed-income securities rated below investment grade that meet Putnam Management’s ESG criteria. This policy is non-fundamental and may be changed only after 60 days’ notice to shareholders. Putnam Management may not apply ESG criteria to investments that are not subject to the fund’s 80% policy and such investments may not meet Putnam Management’s ESG criteria.

design to be less resource intensive. Social criteria include, for example, labor practices and supply chain management. ESG measures in this area might include programs to improve employee well-being, commitment to workplace equality and diversity, or improved stewardship of supplier relationships and working conditions. Corporate governance criteria include, for example, board composition and executive compensation, as well as bondholders’ rights. ESG measures in this area might include improvements in board independence or diversity, or alignment of management incentives with the company’s or issuer’s strategic ESG objectives.

In addition to bonds, the fund may also invest in other fixed-income instruments, including bank loans. In addition to the main investment strategies described above, the fund may make other types of investments, such as investments in equity securities, asset-backed, hybrid and structured bonds and notes, preferred securities that would be characterized as debt securities under applicable accounting standards and tax laws, and assignments of and participations in fixed and floating rate bank loans. The fund may also use derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.

Risk [Heading]

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Principal investment risks

Risk Narrative [Text Block]

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ESG investing risk. Investing with a focus on companies or issuers that meet Putnam Management's ESG criteria may result in the fund investing in certain types of companies, issuers, industries or sectors that the market may not favor. Conversely, investing in such companies or issuers may result in the fund foregoing investment in securities that outperform the fund’s investments in certain environments. In evaluating an investment opportunity, Putnam Management may make investment decisions without the availability of optimal ESG-related data (which may be even less available with securitized debt instruments) or based on information and data that is incomplete or inaccurate. ESG metrics are not uniformly defined and applying such metrics involves subjective assessments. ESG scorings and assessments of issuers can vary across third-party data providers and may change over time. Putnam Management does not rely exclusively on third-party data providers in evaluating ESG criteria. ESG information from third-party data

providers may be incomplete, inaccurate or unavailable, particularly with respect to companies in emerging market countries, which may adversely impact the investment process. The fund does not restrict its investments to “green bonds” (i.e., U.S. dollar-denominated bonds designated as “green” by the Climate Bonds Initiative) and does not restrict investments based solely on “negative screens”. In addition, a company’s or issuer’s business practices, products or services may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent with the fund’s ESG investment criteria. Regulatory changes or interpretations regarding the definitions and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies include ESG criteria. Because fixed-income investments generally represent a promise to pay principal and interest by an issuer, and not an ownership interest, and may involve complex structures, ESG-related investment considerations may have a more limited impact on risk and return (or may have an impact over a different investment time horizon) relative to other asset classes, and this may be particularly true for shorter-term investments. In addition, holders of fixed-income investments do not typically have voting rights, unlike holders of equity investments who have the right to vote on issuer proposals.

Fluctuation of NAV and share price risk. Shares may trade at a larger premium or discount to NAV than shares of other ETFs. The NAV of the fund will generally fluctuate with changes in the market value of the fund’s holdings. The fund’s shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund’s shares may result in the fund’s shares trading significantly above (at a premium) or below (at a discount) NAV or the intraday value of the fund’s holdings. In addition, in stressed market conditions or periods of market disruption or volatility, the market for fund shares may become less liquid in response to deteriorating liquidity in the markets for the fund’s underlying portfolio holdings.

Trading issues risk. The fund has no public trading history. There can be no assurance that an active trading market will develop or be maintained or that the market for fund shares will operate as intended, which could lead to the fund’s shares trading at wider spreads and larger premiums and discounts to NAV than other actively managed ETFs. As a result, it may cost investors more to trade fund shares than shares of other ETFs. There is no guarantee that the fund will be able to attract market makers and authorized participants. Market makers and authorized participants are not obligated to make a market in the fund’s shares or to submit purchase and redemption orders for creation units. The market prices of the fund’s shares are expected to fluctuate, in some cases materially, in response to changes in the fund’s NAV, the intraday value of the Fund’s holdings and supply and demand for the fund’s shares. Putnam Management cannot predict whether the fund’s shares will trade above, below or at their NAV or the intraday value of the fund’s holdings. During such periods, investors may incur significant losses if they sell shares.

Large shareholder risk. Certain accounts or affiliates of Putnam Management, including other funds advised by Putnam Management or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets to the extent such transactions are executed directly with the fund in the form of redemptions through an authorized participant, rather than executed in the secondary market. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. To the extent these large shareholders transact in shares of the fund on the secondary market, such transactions may account for a large percentage of the trading volume on the exchange and may, therefore, have a material effect (upward or downward) on the market price of the fund’s shares.

Authorized participant concentration risk. Only an authorized participant may engage in creation and redemption transactions directly with the fund. The fund may have a limited number of financial institutions that act as authorized participants, none of which are obligated to engage in creation and/ or redemption transactions. To the extent that those authorized participants do not engage in creation and redemption orders, there may be a significantly diminished trading market for fund shares or fund shares may trade at a discount (or premium) to NAV and possibly face trading halts and/or de-listing.

Cash transactions risk. Unlike certain ETFs, the fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in the fund’s shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Market risk. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The novel coronavirus (“COVID-19”) pandemic and efforts to contain its spread are likely to negatively affect the value, volatility, and liquidity of the securities and other assets in which the fund invests and exacerbate other risks that apply to the fund. These effects could negatively impact the fund’s performance and lead to losses on your investment in the fund.

Fixed-income investments risk. The risks associated with fixed-income investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Fixed-income investments are also subject to credit risk, which is the risk that the issuer of a bond may default on payment of interest or principal. Fixed-income investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term fixed-income investments, and credit risk is generally greater for below-investment-grade fixed-income investments (a significant part of the fund’s investments), which can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. The fund invests mostly in higher-yield, higher-risk debt investments that are rated below BBB or its equivalent at the time of purchase by any nationally recognized securities rating agency rating such investments, or in unrated investments that Putnam Management believes are of comparable quality. The fund may invest up to 15% of the fund’s total assets in debt investments rated below CCC or its equivalent, at the time of purchase, by each rating agency rating such investments, or in unrated investments that Putnam Management believes are of comparable quality. This includes investments in the lowest rating category of the rating agency. The fund will not necessarily sell an investment if its rating is reduced after Putnam Management buys it. Investments rated below BBB or its equivalent are below-investment-grade in quality. This rating reflects a greater possibility that the issuers may be unable to make timely payments of interest and principal and thus default. If a default occurs, or is perceived as likely to occur, the value of the investment will usually be more volatile and could decrease. The value of a debt instrument may also be affected by changes in, or perceptions of, the financial condition of the issuer, borrower, counterparty, or other entity, or underlying collateral or assets, or changes in, or perceptions of, specific or general market, economic, industry, political, regulatory, geopolitical, environmental, public health, and other conditions. A default or expected default could also make it difficult for the fund to sell the investment at a price approximating the value Putnam Management had previously placed on it. Lower-rated debt usually has a more limited market than higher-rated debt, which may at times make it difficult for the fund to buy or sell certain debt instruments or to establish their fair values.

Derivatives risk. The fund’s use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative

counterparty), operational risk (e.g., settlement issues or system failure), and legal risk (e.g., insufficient legal documentation or contract enforceability issues).

Floating rate loan risk. To the extent the fund holds floating rate loans, interest rate risk may be reduced but will not be eliminated. While floating rate loans are normally secured by specific collateral or assets of the issuer (so that holders of the loans, such as the fund, will have a priority claim on those assets in the event of default or bankruptcy of the issuer), the value of collateral may be insufficient to meet the issuer’s obligations, and the fund’s access to collateral may be limited by bankruptcy or other insolvency laws. The settlement period (the period between the execution of the trade and the delivery of cash to the purchaser) for floating rate loan transactions is typically longer than seven days, and it is possible that sale proceeds from floating rate loan transactions will not be available to meet redemption obligations.

Portfolio turnover rate risk. From time to time the fund may engage in frequent trading. Funds with high turnover may be more likely to realize capital gains that must be distributed to shareholders as taxable income. High turnover may also cause a fund to pay more brokerage commissions and to incur other transaction costs (including imputed transaction costs), which may detract from performance. The fund’s portfolio turnover rate and the amount of brokerage commissions it pays and transaction costs it incurs will vary over time based on market conditions.

Management and operational risk. There is no guarantee that the investment techniques, analyses, or judgments that Putnam Management applies in making investment decisions for the fund will produce the intended outcome or that the investments Putnam Management selects for the fund will perform as well as other securities that were not selected for the fund. Putnam Management, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program.

Risk Lose Money [Text]

rr_RiskLoseMoney

It is important to understand that you can lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Performance information will be available after the fund completes a full calendar year of operation.

Putnam ESG High Yield ETF | C000237595

Prospectus [Line Items]

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Management Fees (as a percentage of Assets)

rr_ManagementFeesOverAssets

0.55%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses (as a percentage of Assets):

rr_OtherExpensesOverAssets

none

^[2]

Expenses (as a percentage of Assets)

rr_ExpensesOverAssets

0.55%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 56

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 176

Putnam ESG Ultra Short ETF

Prospectus [Line Items]

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Objective [Heading]

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Investment objective

Objective, Primary [Text Block]

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Putnam ESG Ultra Short ETF seeks as high a rate of current income as Putnam Investment Management, LLC (“Putnam Management”) believes is consistent with preservation of capital and maintenance of liquidity.

Expense [Heading]

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Fees and expenses

Expense Narrative [Text Block]

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Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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Strategy [Heading]

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Principal investment strategies

Strategy Narrative [Text Block]

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The fund invests in a diversified short duration portfolio of fixed-income securities comprised of investment-grade money market and other fixed-income securities, including U.S. dollar-denominated foreign securities of these types, with a focus on companies or issuers that Putnam Management, the fund’s investment

manager, believes meet relevant environmental, social or governance (“ESG”) criteria on a sector-specific basis (“ESG criteria”).

The fund’s investments may include obligations of the U.S. government, its agencies and instrumentalities, which are backed by the full faith and credit of the United States (e.g., U.S. Treasury bonds and Ginnie Mae mortgage-backed bonds) or by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae or Freddie Mac) mortgage-backed bonds), domestic corporate debt obligations, taxable municipal debt securities, securitized debt instruments (such as mortgage- and asset-backed securities), repurchase agreements, certificates of deposit, bankers acceptances, commercial paper (including asset-backed commercial paper), time deposits, Yankee Eurodollar securities and other money market instruments. The fund may also invest in U.S. dollar-denominated foreign securities of these types. Under normal circumstances, the effective duration of the fund’s portfolio will generally not be greater than one year. Effective duration provides a measure of a fund’s interest-rate sensitivity. The longer a fund’s duration, the more sensitive the fund is to shifts in interest rates. Under normal circumstances, the dollar-weighted average portfolio maturity of the fund is not expected to exceed four years.

ESG rating ranging from 1 to 4 (1 indicating the highest (best) ESG rating and 4 indicating the lowest (worst) ESG rating). In order to meet Putnam Management’s ESG criteria for purposes of the above-referenced non-fundamental investment policy, a company or issuer must be rated 2 or 1 by Putnam Management. While Putnam Management may consider independent third-party data as a part of its analytical process, the portfolio management team performs its own independent analysis of issuers and does not rely solely on third-party screens.

Putnam Management uses a sector-specific approach in evaluating investments. In the corporate credit sector, Putnam Management combines fundamental analysis with relevant ESG insights with a forward-looking perspective. Putnam Management believes that this approach contributes to a more nuanced assessment of an issuer’s credit profile which offers potential opportunity to limit tail risk in credit portfolios (i.e., the risk that the price of a portfolio may decrease by more than three standard deviations from its current price) and ratings volatility. Putnam Management believes that securitized debt instruments present unique challenges in applying ESG criteria due to the presence of various asset types, counterparties involved, and the complex structure of the securitized debt market along with a lack of available ESG-related data. In evaluating securitized debt instruments for potential investment, Putnam Management takes a broad approach, analyzing both the terms of the transaction, including the asset type being securitized and structure of the securitization, as well as key counterparties. Opportunities are analyzed at the asset level within each securitization and each subsector to identify assets that meet relevant ESG thresholds. Additionally, in evaluating securitized debt instruments, Putnam Management analyzes relevant ESG criteria regarding the originator, servicers, or other relevant counterparties. In the sovereign debt sector, Putnam Management uses quantitative modeling and fundamental research to evaluate countries across a variety of ESG criteria (i.e., natural resource dependence and level of public corruption) and non-ESG criteria (i.e., global economic conditions, market valuations and technicals). Putnam Management believes that sovereign issuers with better ESG scores generally benefit from lower borrowing costs and that ESG criteria may influence the perception of the

credit risk of a country’s debt. Countries are evaluated both on current ESG metrics and the extent of recent progress.

In addition to bonds, the fund may also invest in other fixed-income instruments. In addition to the main investment strategies described above, the fund may make other types of investments, such as investments in hybrid and structured bonds and notes, and preferred securities that would be characterized as debt securities under applicable accounting standards and tax laws. The fund may also use derivatives, such as futures, options, certain foreign currency transactions and swap contracts, for both hedging and non-hedging purposes.

Risk [Heading]

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Principal investment risks

Risk Narrative [Text Block]

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ESG investing risk. Investing with a focus on companies or issuers that meet Putnam Management's ESG criteria may result in the fund investing in certain types of companies, issuers, industries or sectors that the market may not favor. Conversely, investing in such companies or issuers may result in the fund foregoing investment in securities that outperform the fund’s investments in certain environments. In evaluating an investment opportunity, Putnam Management may make investment decisions without the availability of optimal ESG-related data (which may be even less available with securitized debt instruments) or based on information and data that is incomplete or inaccurate. ESG metrics are not uniformly defined and applying such metrics involves subjective assessments. ESG scorings and assessments of issuers can vary across third-party data providers and may change over time. Putnam Management does not rely exclusively on third-party data providers in evaluating ESG criteria. ESG information from third-party data providers may be incomplete, inaccurate or unavailable, particularly with respect to companies in emerging market countries, which may adversely impact the investment process. The fund does not restrict its investments to “green bonds” (i.e., U.S. dollar-denominated bonds designated as “green” by the Climate Bonds Initiative) and does not restrict investments based solely on “negative screens”. In addition, a company’s or issuer’s business practices, products or services may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent with the fund’s ESG investment criteria. Regulatory changes or interpretations regarding the definitions and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies include ESG criteria. Because fixed-income investments generally represent a promise to pay principal and interest by an issuer, and not an ownership interest, and may involve complex structures, ESG-related investment considerations may

have a more limited impact on risk and return (or may have an impact over a different investment time horizon) relative to other asset classes, and this may be particularly true for shorter-term investments. In addition, holders of fixed-income investments do not typically have voting rights, unlike holders of equity investments who have the right to vote on issuer proposals, including ESG-related proposals.

Model Risk. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. Additionally, market movements are likely to change the risk levels and risk allocations of the fund. Investments made based on quantitative models may perform differently from the market as a whole.

Fluctuation of NAV and share price risk. Shares may trade at a larger premium or discount to NAV than shares of other ETFs. The NAV of the fund will generally fluctuate with changes in the market value of the fund’s holdings. The fund’s shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund’s shares may result in the fund’s shares trading significantly above (at a premium) or below (at a discount) NAV or the intraday value of the fund’s holdings. In addition, in stressed market conditions or periods of market disruption or volatility, the market for fund shares may become less liquid in response to deteriorating liquidity in the markets for the fund’s underlying portfolio holdings.

Trading issues risk. The fund has no public trading history. There can be no assurance that an active trading market will develop or be maintained or that the market for fund shares will operate as intended, which could lead to the fund’s shares trading at wider spreads and larger premiums and discounts to NAV than other actively managed ETFs. As a result, it may cost investors more to trade fund shares than shares of other ETFs. There is no guarantee that the fund will be able to attract market makers and authorized participants. Market makers and authorized participants are not obligated to make a market in the fund’s shares or to submit purchase and redemption orders for creation units. The market prices of the fund’s shares are expected to fluctuate, in some cases materially, in response to changes in the fund’s NAV, the intraday value of the Fund’s holdings and supply and demand for the fund’s shares. Putnam Management cannot predict whether the fund’s shares will trade above, below or at their NAV or the intraday value of the fund’s holdings. During such periods, investors may incur significant losses if they sell shares.

Large shareholder risk. Certain accounts or affiliates of Putnam Management, including other funds advised by Putnam Management or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets to the extent such transactions are executed directly with the fund in the form of redemptions through an authorized participant, rather than executed in the secondary market. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. To the extent these large shareholders transact in shares of the fund on the secondary market, such transactions may account for a large percentage of the trading volume on the exchange and may, therefore, have a material effect (upward or downward) on the market price of the fund’s shares.

Authorized participant concentration risk. Only an authorized participant may engage in creation and redemption transactions directly with the fund. The fund may have a limited number of financial institutions that act as authorized participants, none of which are obligated to engage in creation and/ or redemption transactions. To the extent that those authorized participants do not engage in creation and redemption orders, there may be a significantly diminished trading market for fund shares or fund shares may trade at a discount (or premium) to NAV and possibly face trading halts and/or de-listing.

Cash transactions risk. Unlike certain ETFs, the fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in the fund’s shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Market risk. The effects of inflation may erode the value of an investment in the fund over time. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The novel coronavirus (“COVID-19”) pandemic and efforts to contain its spread are likely to negatively affect the value, volatility, and liquidity of the securities and other assets in which the fund invests and exacerbate other risks that apply to the fund. These effects could negatively impact the fund’s performance and lead to losses on your investment in the fund.

Fixed-income investments risk. The risks associated with fixed-income investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Fixed-income investments are also subject to credit risk, which is the risk that the issuer of a fixed-income investment may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally

greater for longer-term debt. Fixed-income investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. The fund may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage-backed securities, and in certain other securities and derivatives, may be or become illiquid.

Derivatives risk. The fund’s use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund’s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failure), and legal risk (e.g., insufficient legal documentation or contract enforceability issues).

Portfolio turnover rate risk. From time to time the fund may engage in frequent trading. Funds with high turnover may be more likely to realize capital gains that must be distributed to shareholders as taxable income. High turnover may also cause a fund to pay more brokerage commissions and to incur other transaction costs (including imputed transaction costs), which may detract from performance. The fund’s portfolio turnover rate and the amount of brokerage commissions it pays and transaction costs it incurs will vary over time based on market conditions.

Management and operational risk. There is no guarantee that the investment techniques, analyses, or judgments that Putnam Management applies in making investment decisions for the fund will produce the intended outcome or that the investments Putnam Management selects for the fund will perform as well as other securities that were not selected for the fund. Putnam Management, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program.

Risk Lose Money [Text]

rr_RiskLoseMoney

It is important to understand that you can lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Performance information will be available after the fund completes a full calendar year of operation.

Putnam ESG Ultra Short ETF | C000237596

Prospectus [Line Items]

rr_ProspectusLineItems

Management Fees (as a percentage of Assets)

rr_ManagementFeesOverAssets

0.25%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses (as a percentage of Assets):

rr_OtherExpensesOverAssets

none

^[3]

Expenses (as a percentage of Assets)

rr_ExpensesOverAssets

0.25%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 26

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 80

Putnam PanAgora ESG Emerging Markets Equity ETF

Prospectus [Line Items]

rr_ProspectusLineItems

Objective [Heading]

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Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Putnam PanAgora ESG Emerging Markets Equity ETF seeks long term capital appreciation.

Expense [Heading]

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Fees and expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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Strategy [Heading]

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Principal investment strategies

Strategy Narrative [Text Block]

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The fund invests mainly in common stocks (growth or value stocks or both) of emerging markets companies of any size with a focus on companies that the fund’s subadviser, PanAgora Asset Management, Inc. (“PanAgora”), believes offer attractive benchmark-relative returns and exhibit positive environmental, social and governance

(“ESG”) metrics. In evaluating and selecting investments for the fund, PanAgora employs a proprietary framework using quantitative models that identify companies that offer above-market return potential based on their ESG metrics, together with other proprietary factors measuring a company’s financial and operational health, and then construct a portfolio that integrates return potential and ESG metrics.

PanAgora uses advanced statistical and machine learning techniques, together with third-party and proprietary data sources, in evaluating companies’ ESG metrics and return potential. Metrics designed to evaluate companies’ environmental practices may include third-party or proprietary data sources, including those regarding a company’s environmental footprint or its environmental efficiencies. Metrics designed to evaluate companies’ social practices may include third-party or proprietary data sources, including those regarding board diversity levels at a company. Metrics designed to evaluate companies’ governance practices may include third-party or proprietary data sources, including those regarding a company’s compensation practices. The ESG metrics and information used in the portfolio construction process may change over time and may not be relevant to all companies that are eligible for investment by the fund.

Under normal circumstances, the fund invests at least 80% of its net assets in equity securities of emerging markets companies that meet PanAgora’s ESG criteria. PanAgora will assign each company an ESG rating using proprietary ESG scores. In order to meet PanAgora’s ESG criteria, a company must have an ESG score above 0, reflecting more positive characteristics. A negative ESG score indicates a lower (or worse) rating. PanAgora assigns companies an ESG score that ranges from -2 to +2, although the range of scores may change over time. This policy is non-fundamental and may be changed only after 60 days’ notice to shareholders. PanAgora may not apply ESG criteria to investments that are not subject to the fund’s 80% policy and such investments may not meet PanAgora’s ESG criteria.

Emerging markets include countries in the MSCI Emerging Market Index or countries that PanAgora considers to be emerging markets based on an evaluation of their level of economic development or the size and experience of their securities markets.

The fund’s equity investments may include common stocks, preferred stocks, convertible securities, warrants, American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”).

PanAgora may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. While PanAgora may consider independent third-party data as a part of its analytical process, the portfolio management team performs its own independent analysis of issuers, through its quantitative model and proprietary scoring system, and does not rely solely on third-party screens.

From time to time, the fund may invest a significant portion of its assets in companies in one or more related industries or sectors. From time to time, the fund may invest a significant portion of its assets in companies in one or more related geographic regions, such as Asian or Pacific Basin countries.

Risk [Heading]

rr_RiskHeading

Principal investment risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

ESG investing risk. Investing with a focus on companies that meet PanAgora's ESG criteria may result in the fund investing in certain types of companies, industries or sectors that the market may not favor. Conversely, investing in such companies may result the fund foregoing investment in securities that outperform the fund’s investments in certain environments. In evaluating an investment opportunity, PanAgora may make investment decisions without the availability of optimal ESG-related data (which may be even less available with securitized debt instruments) or based on information and data that is incomplete or inaccurate. ESG metrics are not uniformly defined and applying such metrics involves subjective assessments. ESG scorings and assessments of issuers can vary across third-party data providers and may change over time. ESG information from third-party data providers may be incomplete, inaccurate or unavailable, particularly with respect to companies in emerging market countries, which may adversely impact the investment process. In addition, a company’s business practices, products or services may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent with the fund’s ESG investment criteria. Regulatory changes or interpretations regarding the definitions and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies include ESG criteria.

Model Risk If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. Additionally, market movements are likely to change the risk levels and risk allocations of the fund. Investments made based on quantitative models may perform differently from the market as a whole.

Fluctuation of NAV and share price risk. Shares may trade at a larger premium or discount to NAV than shares of other ETFs. The NAV of the fund will generally fluctuate with changes in the market value of the fund’s holdings. The fund’s shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund’s shares may result in the fund’s shares trading significantly above (at a premium) or below (at a discount) NAV or the intraday value of the fund’s holdings. In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund’s underlying portfolio holdings.

Trading issues risk. The fund has no public trading history. There can be no assurance that an active trading market will develop or be maintained or that the market for fund shares will operate as intended, which could lead to the fund’s shares trading at wider spreads and larger premiums and discounts to NAV than other actively managed ETFs. As a result, it may cost investors more to trade fund shares than shares of other ETFs. There is no guarantee that the fund will be able to attract market makers and authorized participants. Market makers and authorized participants are not obligated to make a market in the fund’s shares or to submit purchase and redemption orders for creation units. The market prices of the fund’s shares are expected to fluctuate, in some cases materially, in response to changes in the fund’s NAV, the intraday value of the fund’s holdings and supply and demand for the fund’s shares. PanAgora cannot predict whether the fund’s shares will trade above, below or at their NAV or the intraday value of the fund’s holdings. During such periods, investors may incur significant losses if they sell shares.

Large shareholder risk. Certain accounts or affiliates of PanAgora, including other funds advised by Putnam Management or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets to the extent such transactions are executed directly with the fund in the form of redemptions through an authorized participant, rather than executed in the secondary market. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. To the extent these large shareholders transact in shares of the fund on the secondary market, such transactions may account for a large percentage of the trading volume on the exchange and may, therefore, have a material effect (upward or downward), on the market price of the fund’s shares.

Authorized participant concentration risk. Only an authorized participant may engage in creation and redemption transactions directly with the fund. The fund may have a limited number of financial institutions that act as authorized participants, none of which are obligated to engage in creation and/ or redemption transactions. To the extent that those authorized participants do not engage in creation and redemption orders, there may be a significantly diminished trading market for fund shares or fund shares may trade at a discount (or premium) to NAV and possibly face trading halts and/or de-listing.

Cash transactions risk. Unlike certain ETFs, the fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the fund might

not have recognized if it were to distribute portfolio securities in-kind. As such, investments in the fund’s shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Market risk. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The novel coronavirus (“COVID-19”) pandemic and efforts to contain its spread are likely to negatively affect the value, volatility, and liquidity of the securities and other assets in which the fund invests and exacerbate other risks that apply to the fund. These effects could negatively impact the fund’s performance and lead to losses on your investment in the fund.

Common stock risk. Common stock represents an ownership interest in a company. The value of a company’s stock may fall or fail to rise as a result of factors directly relating to that company, such as decisions made by its management or lower demand for the company’s products or services. A stock’s value may also fall because of factors affecting not just the company, but also other companies in the same industry or in a number of different industries, such as increases in production costs. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

Foreign investment risk. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation), and may be or become illiquid. There may be less publicly-available information, or less reliable publicly-available information, about foreign companies (including information related to companies’ ESG practices), particularly with respect to emerging market companies, than publicly-available

information regarding U.S. companies. As a result, the fund’s ability to evaluate a foreign company, including with respect to its ESG or sustainability practices, may be more limited than its ability to evaluate a U.S. company.

Small and midsize companies risk. Stocks of small and midsize companies often trade in smaller volumes, and their prices may fluctuate more than stocks of larger companies. Stocks of these companies may therefore be more vulnerable to adverse developments than those of larger companies.

Industry or sector concentration risk. From time to time, the fund may invest a significant portion of its assets in companies in one or more related industries or sectors, which would make the fund more vulnerable to adverse developments affecting those industries or sectors.

Geographic focus risk. From time to time, the fund may invest a significant portion of its assets in companies in one or more related geographic regions, industries or sectors, such as Asian or Pacific Basin countries, which would make the fund more vulnerable to adverse developments affecting those geographic regions, industries or sectors, including political, economic, or other developments adversely impacting ESG or sustainable investing.

Management and operational risk. There is no guarantee that the investment techniques, analyses, or judgments that PanAgora applies in making investment decisions for the fund will produce the intended outcome or that the investments PanAgora selects for the fund will perform as well as other securities that were not selected for the fund. PanAgora, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program.

Risk Lose Money [Text]

rr_RiskLoseMoney

It is important to understand that you can lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

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Performance information will be available after the fund completes a full calendar year of operation.

Putnam PanAgora ESG Emerging Markets Equity ETF | C000237597

Prospectus [Line Items]

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Management Fees (as a percentage of Assets)

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0.60%

Distribution and Service (12b-1) Fees

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none

Other Expenses (as a percentage of Assets):

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none

^[4]

Expenses (as a percentage of Assets)

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0.60%

Expense Example, with Redemption, 1 Year

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$ 61

Expense Example, with Redemption, 3 Years

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$ 192

Putnam PanAgora ESG International Equity ETF

Prospectus [Line Items]

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Objective [Heading]

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Investment objective

Objective, Primary [Text Block]

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Putnam PanAgora ESG International Equity ETF seeks long term capital appreciation.

Expense [Heading]

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Fees and expenses

Expense Narrative [Text Block]

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Operating Expenses Caption [Text]

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Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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Strategy [Heading]

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Principal investment strategies

Strategy Narrative [Text Block]

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The fund invests mainly in common stocks (growth or value stocks or both) of companies of any size outside the United States with a focus on companies that the fund’s subadviser, PanAgora Asset Management, Inc. (“PanAgora”), believes offer attractive benchmark-relative returns and exhibit positive environmental, social and governance (“ESG”) metrics. In evaluating and selecting investments for the fund, PanAgora employs a proprietary framework using quantitative models that

identify companies that offer above-market return potential based on their ESG metrics, together with other proprietary factors measuring a company’s financial and operational health, and then construct a portfolio that integrates return potential and ESG metrics.

PanAgora uses advanced statistical and machine learning techniques, together with third-party and proprietary data sources, in evaluating companies’ ESG metrics and return potential. Metrics designed to evaluate companies’ environmental practices may include third-party or proprietary data sources, including those regarding a company’s environmental footprint or its environmental efficiencies. Metrics designed to evaluate companies’ social practices may include third-party or proprietary data sources, including those regarding board diversity levels at a company. Metrics designed to evaluate companies’ governance practices may include third-party or proprietary data sources, including those regarding a company’s shareholder structure. Additionally, PanAgora’s quantitative model may also use third-party and/or proprietary data sources to identify companies exhibiting improved ESG profiles or those investing in ESG initiatives. The ESG metrics and information used in the portfolio construction process may change over time and may not be relevant to all companies that are eligible for investment by the fund.

Under normal circumstances, the fund invests at least 80% of its net assets in equity securities of companies that meet PanAgora’s ESG criteria. PanAgora will assign each company an ESG rating using proprietary ESG scores. In order to meet PanAgora’s ESG criteria, a company must have an ESG score above 0, reflecting more positive characteristics. A negative ESG score indicates a lower (or worse) rating. PanAgora assigns companies an ESG score that ranges from -2 to +2, although the range of scores may change over time. This policy is non-fundamental and may be changed only after 60 days’ notice to shareholders. PanAgora may not apply ESG criteria to investments that are not subject to the fund’s 80% policy and such investments may not meet PanAgora’s ESG criteria.

The fund’s equity investments may include common stocks, preferred stocks, convertible securities, warrants, American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The fund invests mainly in developed countries but may also invest in emerging markets.

From time to time, the fund may invest a significant portion of its assets in companies in one or more related industries or sectors. The fund may also invest a significant portion of its assets in one or more related geographic regions, such as European and Asian countries.

Risk [Heading]

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Principal investment risks

Risk Narrative [Text Block]

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ESG investing risk. Investing with a focus on companies that meet PanAgora's ESG criteria may result in the fund investing in certain types of companies, industries or sectors that the market may not favor. Conversely, investing in such companies may result the fund foregoing investment in securities that outperform the fund’s investments in certain environments. In evaluating an investment opportunity, PanAgora may make investment decisions without the availability of optimal ESG-related data (which may be even less available with securitized debt instruments) or based on information and data that is incomplete or inaccurate. ESG metrics are not uniformly defined and applying such metrics involves subjective assessments. ESG scorings and assessments of issuers can vary across third-party data providers and may change over time. ESG information from third-party data providers may be incomplete, inaccurate or unavailable, particularly with respect to companies in emerging market countries, which may adversely impact the investment process. In addition, a company’s business practices, products or services may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent with the fund’s ESG investment criteria. Regulatory changes or interpretations regarding the definitions and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies include ESG criteria.

Model Risk. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses. Additionally, market movements are likely to change the risk levels and risk allocations of the fund. Investments made based on quantitative models may perform differently from the market as a whole.

Fluctuation of NAV and share price risk. Shares may trade at a larger premium or discount to NAV than shares of other ETFs. The NAV of the fund will generally fluctuate with changes in the market value of the fund’s holdings. The fund’s shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund’s shares may result in the fund’s shares trading significantly above (at a premium) or below (at a discount) NAV or the intraday value of the fund’s holdings. In addition, in stressed market conditions or periods of market disruption or volatility, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the fund’s underlying portfolio holdings.

Trading issues risk. The fund has no public trading history. There can be no assurance that an active trading market will develop or be maintained or that the market for fund shares will operate as intended, which could lead to the fund’s shares trading at wider spreads and larger premiums and discounts to NAV than other actively managed ETFs. As a result, it may cost investors more to trade fund shares than shares of other ETFs. There is no guarantee that the fund will be able to attract market

makers and authorized participants. Market makers and authorized participants are not obligated to make a market in the fund’s shares or to submit purchase and redemption orders for creation units. The market prices of the fund’s shares are expected to fluctuate, in some cases materially, in response to changes in the fund’s NAV, the intraday value of the fund’s holdings and supply and demand for the fund’s shares. PanAgora cannot predict whether the fund’s shares will trade above, below or at their NAV or the intraday value of the fund’s holdings. During such periods, investors may incur significant losses if they sell shares.

Large shareholder risk. Certain accounts or affiliates of PanAgora, including other funds advised by Putnam Management or third parties, may from time to time own (beneficially or of record) or control a substantial amount of the fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund’s liquidity and net assets to the extent such transactions are executed directly with the fund in the form of redemptions through an authorized participant, rather than executed in the secondary market. These redemptions may also force the fund to sell securities, which may increase the fund’s brokerage costs. To the extent these large shareholders transact in shares of the fund on the secondary market, such transactions may account for a large percentage of the trading volume on the exchange and may, therefore, have a material effect (upward or downward), on the market price of the fund’s shares.

Authorized participant concentration risk. Only an authorized participant may engage in creation and redemption transactions directly with the fund. The fund may have a limited number of financial institutions that act as authorized participants, none of which are obligated to engage in creation and/ or redemption transactions. To the extent that those authorized participants do not engage in creation and redemption orders, there may be a significantly diminished trading market for fund shares or fund shares may trade at a discount (or premium) to NAV and possibly face trading halts and/or de-listing.

Cash transactions risk. Unlike certain ETFs, the fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in the fund’s shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Market risk. The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The novel coronavirus (“COVID-19”) pandemic and efforts to contain its spread are likely to negatively affect the value, volatility, and liquidity of the securities and other assets in which the fund invests and exacerbate other risks that apply to the fund. These effects could negatively impact the fund’s performance and lead to losses on your investment in the fund.

Common stock risk. Common stock represents an ownership interest in a company. The value of a company’s stock may fall or fail to rise as a result of factors directly relating to that company, such as decisions made by its management or lower demand for the company’s products or services. A stock’s value may also fall because of factors affecting not just the company, but also other companies in the same industry or in a number of different industries, such as increases in production costs. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound. These risks are generally greater for small and midsize companies.

Foreign investment risk. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation), and may be or become illiquid. There may be less publicly-available information, or less reliable publicly-available information, about foreign companies (including information related to companies’ ESG practices), particularly with respect to emerging market companies, than publicly-available information regarding U.S. companies. As a result, the fund’s ability to evaluate a foreign company, including with respect to its ESG or sustainability practices, may be more limited than its ability to evaluate a U.S. company.

Small and midsize companies risk. Stocks of small and midsize companies often trade in smaller volumes, and their prices may fluctuate more than stocks of larger companies. Stocks of these companies may therefore be more vulnerable to adverse developments than those of larger companies.

Industry or sector concentration risk. From time to time, the fund may invest a significant portion of its assets in companies in one or more related industries or sectors, which would make the fund more vulnerable to adverse developments affecting those industries or sectors.

Geographic focus risk. From time to time, the fund may invest a significant portion of its assets in companies in one or more related geographic regions, industries or sectors, such as European and Asian countries, which would make the fund more vulnerable to adverse developments affecting those geographic regions, industries or sectors, including political, economic, or other developments adversely impacting ESG or sustainable investing.

Management and operational risk. There is no guarantee that the investment techniques, analyses, or judgments that PanAgora applies in making investment decisions for the fund will produce the intended outcome or that the investments PanAgora selects for the fund will perform as well as other securities that were not selected for the fund. PanAgora, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program.

Risk Lose Money [Text]

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It is important to understand that you can lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

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Performance

Performance Narrative [Text Block]

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Performance information will be available after the fund completes a full calendar year of operation.

Putnam PanAgora ESG International Equity ETF | C000237598

Prospectus [Line Items]

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Management Fees (as a percentage of Assets)

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0.49%

Distribution and Service (12b-1) Fees

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none

Other Expenses (as a percentage of Assets):

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none

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Expenses (as a percentage of Assets)

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0.49%

Expense Example, with Redemption, 1 Year

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$ 50

Expense Example, with Redemption, 3 Years

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$ 157

[1]	Other expenses are based on estimated amounts for the current fiscal year.
[2]	Other expenses are based on estimated amounts for the current fiscal year.
[3]	Other expenses are based on estimated amounts for the current fiscal year.
[4]	Other expenses are based on estimated amounts for the current fiscal year.
[5]	Other expenses are based on estimated amounts for the current fiscal year.