Developer Tools
JWT Decoder
Decode and inspect any JSON Web Token (JWT) directly in your browser. View the header, payload, and expiry information — without sending your token to any external server. Useful for debugging authentication and API issues.
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Paste your JWT token into the input
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See header, payload, and claims decoded instantly
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Check token expiry time
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Verify the structure is valid
Paste JWT Token
💡 Pro Tips
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Never paste production JWT tokens into online tools — use this tool since it works entirely in your browser.
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The signature part of a JWT cannot be verified without the secret key — this tool shows claims only.
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JWT tokens are base64 encoded, not encrypted — anyone with the token can read the payload.
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The 'exp' claim is a Unix timestamp — use the Timestamp Converter to convert it to a readable date.
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Always validate JWTs on the server — client-side decoding is for debugging only.
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A JWT has three parts: header.payload.signature — each separated by a dot.
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Expired JWTs should be rejected by your server — check the exp claim matches your session logic.