JWT Decoder

Decode JWT tokens to view header, payload, and signature info

JWT Decoder — Decode and Inspect JSON Web Tokens for Debugging

1. Paste your JWT token into the input field. A JWT looks like three base64-encoded segments separated by dots: header.payload.signature. The tool accepts standard JWTs, including those with custom claims.
2. The decoder instantly parses and displays the header (algorithm type, token type) and the payload (claims, user info, permissions, expiration time). The decoded data is formatted as readable JSON with syntax highlighting.
3. Review the decoded claims — check the issued-at (iat) and expiration (exp) timestamps, verify user roles and permissions, inspect custom claims, and debug authentication issues in your application.

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