Does this JWT decoder verify signatures?
No. It decodes the header and payload only. Signature verification needs the correct secret or public key.
Developer
JWT Decoder
Paste a JSON Web Token to inspect the decoded header, payload and common timestamp claims locally.
✓ Tool inputs are processed in your browser✓ No account
Decode JWT header and payload locally.
When to use this tool
Use it when a JWT header and payload need to be inspected locally without verifying the signature or sending the token away.
- Inspect token claims while debugging auth.
- Check expiry and issued-at timestamps locally.
- Read a JWT payload without pasting it into an external service.
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FAQ
Questions
Questions
Is my token uploaded?
No. Decoding runs locally in your browser.
Which JWT claims are highlighted?
The tool highlights common algorithm, type, issuer, subject, expiry and issued-at values when present.