JWT Decoder
Debug and Decode JSON Web Tokens (JWT). Inspect headers and payload claims without verifying the signature. Client-side only.
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key Features
- Decode header, payload, and signature
- Human-readable date format for 'exp' and 'iat'
- Color-coded JSON output
- Works offline/locally
The JWT Decoder allows you to inspect the contents of a JSON Web Token. JWTs are commonly used for authentication in modern web applications (e.g., logging in).
This tool decodes the Base64Url encoded parts of the token so you can read the claims (like User ID, Expiry Date, Roles). Note: We do not verify the signature, we simply display the data contained within the token.
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