Tool
JWT Decoder
Decode JWT header and payload locally for debugging. Signature not verified.
Developer Tools
What this tool does
Paste a JWT to decode its header and payload segments for debugging OAuth and API tokens.
How to use
- Paste a JWT token.
- Click Decode.
- Review header, payload, and exp/iat timestamps.
Examples
Sample token
Input: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
Output: Header and payload JSON
Base64url segments decode to JSON objects.
Common use cases
- Debug OAuth access tokens
- Inspect JWT claims during development
- Check token expiration
FAQ
Is the signature verified?
No. This tool decodes only; it does not validate signatures.
Are tokens sent to a server?
No. Decoding runs locally in your browser.
Can I decode Bearer tokens?
Yes. A leading Bearer prefix is stripped automatically.
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Last reviewed: 2026-05-23