Cover - shares	3 Months Ended
	Mar. 31, 2025	May 08, 2025
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Mar. 31, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Entity Information [Line Items]
Entity Registrant Name	JASPER THERAPEUTICS, INC.
Entity Central Index Key	0001788028
Entity File Number	001-39138
Entity Tax Identification Number	84-2984849
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	2200 Bridge Pkwy
Entity Address, Address Line Two	Suite #102
Entity Address, City or Town	Redwood City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94065
Entity Phone Fax Numbers [Line Items]
City Area Code	(650)
Local Phone Number	549-1400
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		15,022,122
Voting Common Stock, par value $0.0001 per share
Entity Listings [Line Items]
Title of 12(b) Security	Voting Common Stock, par value $0.0001 per share
Trading Symbol	JSPR
Security Exchange Name	NASDAQ
Redeemable Warrants, each ten warrants exercisable for one share of Voting Common Stock at an exercise price of $115.00
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable Warrants, each ten warrants exercisable for one share of Voting Common Stock at an exercise price of $115.00
Trading Symbol	JSPRW
Security Exchange Name	NASDAQ