JWT Decoder

Decode JWT headers and payloads without verifying the signature.

JWT Token

Header

Decoded JSON will appear here

Payload

Decoded JSON will appear here

Use cases

Paste a bearer token and inspect the header and payload while diagnosing login or API failures.

Read exp, iat, issuer, audience, and subject fields before deciding whether a token is stale or misconfigured.

Compare tokens from staging and production to find mismatched claims without running backend code.

Does this verify the JWT signature?+

No. It decodes the token only and does not verify trust or validity.

Should I paste production tokens here?+

The tool runs locally, but you should still avoid sharing sensitive tokens unnecessarily.

Endpoint

POST/api/tools/jwt-decoder

Request

{
  "input": "hello world",
  "options": {}
}

Response

{
  "result": "processed output",
  "tool": "jwt_decoder"
}