COVER - shares	3 Months Ended
	Mar. 31, 2022	May 06, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-39817
Entity Registrant Name	Boxed, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-3316188
Entity Address, Address Line One	451 Broadway, Floor 2
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10013
City Area Code	(646)
Local Phone Number	586-5599
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		68,855,829
Entity Central Index Key	0001828672
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Common stock, par value $0.0001
Document Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.0001
Trading Symbol	BOXD
Security Exchange Name	NYSE
Warrants, each warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Document Information [Line Items]
Title of 12(b) Security	Warrants, each warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Trading Symbol	BOXD WS
Security Exchange Name	NYSE