🎫 JWT Decoder

Decode a JSON Web Token. View header, payload, and signature. Check expiration (exp) and issued-at (iat) timestamps.

JWT (paste a token)

Header

Payload

Signature

Claims analysis

🔒 Privacy: decoding happens in your browser. Tokens are not transmitted.

⚠️ This tool only decodes the token — it does NOT verify the signature. For signature verification, use a proper library with the original secret/key.