JWT tools
Free JWT tools that run in your browser: read a token's claims, verify HS, RS, PS, ES and EdDSA signatures, check expiry, and generate signed test tokens.
All JWT tools
JWT Decoder
Explains every claim, checks the signature and flags what a reviewer would.
Open toolJWT Verifier
Checks HS, RS, PS, ES and EdDSA signatures with WebCrypto. Keys never leave the tab.
Open toolJWT Expiry Checker
Turns the timestamps into real dates and says how long you have left.
Open toolJWT Generator
Compose claims, sign with a secret or a fresh key pair, and copy the token.
Open toolBase64URL Encoder
The padding-free Base64 variant JWTs use, in both directions.
Open tool