Danilo Pinotti

JWT Decoder

JWT inspector

Inspect JWT structure without sending the token anywhere

Decode Base64URL header and payload locally, review claims quickly and keep in mind that this tool does not verify signatures.

Decode token

Paste a JWT with two or three segments. Header and payload will be pretty-printed for inspection.

JWT token

Header.Payload.Signature

Header

Payload

Signature

Signature will appear here

Security note

Decoding a JWT only reveals its contents. It does not prove authenticity, validity window, issuer trust or signature correctness.

Quick summary

Status
Idle
Algorithm
Unknown
Type
Unknown
Expires
Not provided

What to expect

  • Supports standard JWT Base64URL decoding.
  • Header and payload are rendered as formatted JSON.
  • Malformed tokens return a clear error state instead of partial output.
  • Useful for inspecting claims like `sub`, `iss`, `aud`, `iat` and `exp`.

This was useful for you? Do you have a suggestion? Please, consider submit a PR on this project on GitHub