🔑 JWT (JSON Web Token) Inspector & Decoder
Inspect and decode JSON Web Tokens (JWT) locally to examine headers, payload claims, and expiration status. 100% client-side, private, and secure.
🔑 Encoded Token String
🔴 Decoded Header
🟣 Decoded Payload Claims
❓ Frequently Asked Questions
Is my JWT token or secret sent to any external server?
No. All JWT string parsing, Base64URL decoding, timestamp conversions, and claim inspections execute 100% locally inside your web browser for total privacy.
How does the tool calculate whether a JWT token is expired?
The tool parses the 'exp' (Expiration Time) claim within the JWT payload and compares it against your local system's current Unix epoch timestamp.
What are the three parts of a JSON Web Token?
A standard JWT consists of three dot-separated parts: Header (algorithm & token type), Payload (user claims and expiration data), and Signature (verification hash).
