JWT Decoder
Decode and inspect JSON Web Tokens
JWT Token Decoder
Decoded Output
| Claim | Value | Description |
|---|
Usage Examples
Basic JWT Token
A simple JWT with basic user claims like subject and name. Perfect for understanding JWT structure.
Expired Token
An expired JWT token to see how the decoder shows expiration status and issued-at timestamps.
Full Claims Token
A comprehensive JWT with all standard registered claims: iss, sub, aud, exp, nbf, iat, and jti.
Features
Color-Coded Sections
Header (blue), payload (green), and signature (red) are visually separated for easy reading
Expiry Detection
Automatically checks if the token is expired or still valid by comparing exp claim with current time
Claims Inspector
Displays all registered JWT claims (iss, sub, aud, exp, nbf, iat, jti) with human-readable dates
Privacy First
All decoding happens locally in your browser using JavaScript. No tokens are sent to any server
How to Use?
Paste Token
Paste your JWT token into the input field. The token will be automatically decoded on paste.
Inspect Output
View the decoded header, payload, and signature in color-coded sections. Check registered claims and expiry status.
Copy Sections
Copy individual sections (header, payload, signature) to your clipboard using the copy buttons.
Frequently Asked Questions
What is JWT Decoder?
Got a JWT token from an API and wondering what's inside? Paste it here and instantly see the header, payload, and claims decoded in a readable format. It also tells you right away if the token is expired.
Why Use This JWT Decoder?
Color-coded sections (header blue, payload green, signature red) make it easy to read. Auto-detects expiry, shows all registered claims with actual dates instead of Unix timestamps. Everything stays in your browser - your tokens never leave your device.