JWT Decoder
Decode and validate JSON Web Tokens. Inspect JWT headers, payloads, and verify signatures.
Decode and inspect JSON Web Tokens (JWTs) to view their header, payload, and signature. Useful for debugging authentication and API tokens.
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Instant JWT decoding
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View header, payload, and signature
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No registration required
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Completely free
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Works in your browser
How to Use
- Paste your JWT token into the input box
- Click Decode JWT
- View the decoded header, payload, and signature
- Copy the result for your records or debugging
Frequently Asked Questions
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties.
Can I verify the signature with this tool?
This tool decodes JWTs but does not verify their signatures.
Is my data sent to a server?
No, all decoding happens in your browser. Your data never leaves your device.