Document And Entity Information	12 Months Ended
	Dec. 31, 2021
Document Information Line Items
Entity Registrant Name	Jasper Therapeutics, Inc.
Document Type	POS AM
Amendment Flag	true
Amendment Description	This Post-Effective Amendment No. 1 (“Post-Effective Amendment No. 1”) to the Registration Statement on Form S-1 (File No. 333-260306) (the “Registration Statement”), as originally declared effective by the Securities and Exchange Commission (the “SEC”) on October 26, 2021, is being filed to include information contained in the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on March 18, 2022 and to update certain other information in the Registration Statement.The information included in this filing amends the Registration Statement and the prospectus contained therein. No additional securities are being registered under this Post-Effective Amendment No. 1. All applicable registration fees were paid at the time of the original filing of the Registration Statement on October 18, 2021.
Entity Central Index Key	0001788028
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false