| Document and Entity Information | Dec. 15, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | JFrog Ltd |
| Amendment Flag | false |
| Entity Central Index Key | 0001800667 |
| Document Type | 8-K |
| Document Period End Date | Dec. 15, 2021 |
| Entity Incorporation State Country Code | L3 |
| Entity File Number | 001-39492 |
| Entity Tax Identification Number | 98-0680649 |
| Entity Address, Address Line One | 270 E. Caribbean Drive |
| Entity Address, City or Town | Sunnyvale |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94089 |
| City Area Code | (408) |
| Local Phone Number | 329-1540 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Ordinary Shares, NIS 0.01 par value |
| Trading Symbol | FROG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
