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JWT Token Decoder
Decode and inspect JWT tokens client-side. Splits header, payload, and signature.
Client-side only. This tool does NOT verify the JWT signature — it only decodes the header and payload.
About JWT Decoder
JWT Decoder parses and displays the header, payload, and signature sections of any JSON Web Token. It shows all claims in a readable format including expiration and issued-at times. Useful for debugging authentication flows and API integrations without needing a backend.
- Decodes header, payload, signature
- Displays all JWT claims clearly
- Shows expiration and iat times
- Works entirely client-side