JWT Claims Inspector & Expiration Checker
Safely inspect JWT tokens without exposing secrets. View header algorithm, claims, subject (sub), issuer (iss), audience (aud), and real-time expiration countdown.
How to Use JWT Claims Inspector & Expiration Checker
Paste JWT Token
Paste your Bearer token or raw JWT string.
Inspect Claims
View formatted JSON header and payload with human-readable timestamps.
Check Expiry
Inspect token validity status and remaining lifetime.
About JWT Claims Inspector & Expiration Checker
Splits token into three base64url-encoded segments, applies base64 decoding with URL-safe padding replacement, and parses JSON structures.
Supported Formats
Operational Limits
- •Decodes and inspects claims; cryptographic signature verification requires a shared secret or public key.
Key Features
- Decodes header, payload, and signature components
- Converts exp and iat Unix epoch timestamps to local and UTC date strings
- Live token expired/active status badge
- Calculates remaining token validity time
- 100% private client-side decoding
Frequently Asked Questions
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