Browser-local workflow
Decode a JWT payload without uploading the token.
Decode headers and payloads, inspect exp, iss, and aud claims, and check token structure directly in your browser.
Launch AccessJWT Decoder is currently free with unlimited use. No payment method required.
JWT Token
JWT
Paste a JWT token and click Decode
How JWT works
HEADER
Algorithm & token type. Base64URL-encoded JSON.
PAYLOAD
Claims and data. Not encrypted - anyone can decode it.
SIGNATURE
Verifies the token hasn't been tampered with.
Pro Feature
Keep your tokens safe
JWT tokens contain session data and auth claims. PayloadBench Pro decodes them locally with no pasted-content upload. Pro tools are currently free during Launch Access.
About PayloadBench JWT Decoder
PayloadBench JWT Decoder decodes JWT headers and claims in the browser. Do not paste production secrets unless your policy allows local inspection.
- Is it safe to paste a real JWT token into PayloadBench?
- PayloadBench JWT Decoder is designed for sensitive JWT inspection. The token is decoded in the browser workflow with no pasted-content upload. For production JWTs that contain sensitive claims, verify local processing with DevTools Network before relying on any decoder.
- How to verify that PayloadBench JWT Decoder does not upload your token?
- Open PayloadBench JWT Decoder, open DevTools (F12) and go to the Network tab. Paste a JWT token and decode it. Check that no network request contains your token.
- How does the JWT Decoder work?
- PayloadBench decodes the JWT header and payload using base64url decoding. It displays the decoded JSON in a tree view and raw format. The signature is shown but not cryptographically verified; PayloadBench is a decoder, not a validator.
- Why shouldn't I paste a production JWT into a server-side decoder?
- Server-side JWT decoders can transmit your token to a remote server for processing. If the token is a production access token or contains sensitive claims, that information can end up on third-party infrastructure. A browser-local decoder reduces that exposure.
- What JWT claims can I see?
- The decoder displays standard and custom claims from the JWT payload, including sub, iss, aud, exp, iat, nbf, and custom claims. The header shows the algorithm (alg) and token type (typ).