| Cover | Nov. 12, 2021 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 12, 2021 |
| Entity File Number | 001-39138 |
| Entity Registrant Name | JASPER THERAPEUTICS, INC. |
| Entity Central Index Key | 0001788028 |
| Entity Tax Identification Number | 84-2984849 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 2200 Bridge Pkwy Suite #102 |
| Entity Address, City or Town | Redwood City |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94065 |
| City Area Code | (650) |
| Local Phone Number | 549-1400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Voting Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Voting Common Stock, par value $0.0001 per share |
| Trading Symbol | JSPR |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants, each whole warrant exercisable for one share of Voting Common Stock at an exercise price of $11.50 | |
| Title of 12(b) Security | Redeemable Warrants, each whole warrant exercisable for one share of Voting Common Stock at an exercise price of $11.50 |
| Trading Symbol | JSPRW |
| Security Exchange Name | NASDAQ |
