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JWT Debugger

Decode and inspect JSON Web Tokens (JWT) headers and payloads without verifying the signature. Useful for debugging auth issues.

Free to use

Encoded token

Decode a JWT header and payload locally for troubleshooting. The signature is not verified, and decoded claims must not be treated as trusted.

Paste a JWT to begin.

How to use

Paste a JSON Web Token and click Decode locally. JWTs are encoded, not encrypted; avoid pasting production tokens into tools you do not control.

About JWT Debugger

Decode and inspect JSON Web Tokens (JWT) headers and payloads without verifying the signature. Useful for debugging auth issues.

How to use this tool

  1. Enter the requested data or choose an upload.
  2. Check the file type and size limit before submitting.
  3. Review the result, then download or copy it.
  4. Keep the original and use the actions above to continue safely.

Read the full JWT Debugger guide →