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JWT Decoder
Decode JWT headers and payloads instantly. Inspect JSON Web Tokens in your browser without verifying or uploading the token.
Decode a JSON Web Token to inspect its header, payload, and signature parts. This tool is useful when debugging authentication flows, API requests, and token claims.
How to use JWT Decoder
- Paste a JWT into the token field.
- Review the decoded header and payload JSON.
- Copy the decoded sections for debugging or documentation.
Features
- Decodes Base64URL JWT header and payload sections.
- Pretty prints decoded JSON for easier inspection.
- Clearly separates header, payload, and signature.
- Runs in the browser and does not verify signatures.
Examples
Inspect token claims
Input
A JWT with header.payload.signature
Output
Readable JSON showing claims such as iss, sub, aud, iat, and exp
Privacy
JWT decoding happens locally in your browser.
FAQ
Does this verify JWT signatures?
No. It only decodes token contents. Signature verification requires the correct secret or public key.
Is decoding a JWT the same as decrypting it?
No. Most JWTs are encoded, not encrypted, so claims can be read by anyone with the token.
Should I paste production tokens?
Avoid pasting sensitive production tokens into any online tool unless your security policy allows it.
Related searches
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