JSON Web Token (JWT) Decoder & Inspector
Decode and inspect JSON Web Tokens (JWTs) instantly. View decoded Header claims, Payload data, issued-at time (iat), and expiration timestamps (exp) safely.
Key Features
- Decode JWT Header, Payload, and Signature components
- Human-readable date formatting for exp (expiration) and iat (issued at)
- Live token expiration countdown indicator
- Syntax highlighted JSON payload display
- 100% private: tokens are never transmitted across the network
How to Use JWT Token Inspector
- Paste your raw JWT string (e.g. eyJhbGciOi...) into the input box.
- View automatically decoded Header and Payload JSON structures.
- Check whether the token is active or expired.
- Copy parsed payload parameters with a single click.
Frequently Asked Questions
Is it safe to paste authentication JWT tokens here?
Yes! Unlike external decoder websites, our tool runs 100% client-side in your browser. Zero network requests are made.
Can this tool verify JWT signature secret keys?
It decodes token structure and claims. Signature verification can be checked locally if secret key is provided.
What does the "exp" claim mean in a JWT token?
The "exp" claim represents the Unix timestamp after which the JWT token is rejected as expired.
Is this decoder free for developers?
Yes, 100% free with unlimited token decoding.