YurlieJWT Decoder
Decode and inspect JWT tokens. View header, payload claims, expiration, and algorithm. Signature verification requires the secret key and is not performed here.
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzEyMyIsIm5hbWUiOiJBbGljZSIsImVtYWlsIjoiYWxpY2VAeXVybGllLmNvbSIsInJvbGUiOiJ1c2VyIiwiaWF0IjoxNzAwMDAwMDAwLCJleHAiOjk5OTk5OTk5OTl9.example_signature
HeaderPayloadSignature
ClaimValueDescription
sub"user_123"name"Alice"email"alice@yurlie.com"role"user"iat1700000000Nov 14, 2023, 10:13:20 PM UTCexp9999999999Nov 20, 2286, 05:46:39 PM UTCSignature verification requires the secret key and is not performed in the browser. This tool is for decoding and inspecting only.
JWT Structure
A JWT has three Base64url-encoded parts separated by dots: header.payload.signature. The header specifies the algorithm; the payload contains claims (user data + expiry); the signature verifies integrity.