JWT tools
Free JWT tools that run in your browser: decode a token’s header and claims, verify HS256/384/512 signatures, check expiry times, generate signed test tokens, and encode Base64URL. Tokens and secrets never leave the tab.
All JWT tools
JWT Decoder
Splits the token and pretty-prints every claim, without sending it anywhere first.
Open toolJWT Verifier
Verifies HS256/384/512 with WebCrypto — your secret never leaves 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 locally, and copy a token for your own test suite.
Open toolBase64URL Encoder
The padding-free Base64 variant JWTs use, in both directions.
Open tool