JWT Decoder
Decode and verify JSON Web Tokens with detailed analysis
JWT Token Input
About JWT Decoder
Our JWT Decoder is a comprehensive tool for analyzing and understanding JSON Web Tokens. Whether you're debugging authentication issues, exploring token structure, or learning about JWT format, this tool provides detailed insights into every component of your tokens while maintaining complete privacy.
100% Client-Side
All decoding happens in your browser - tokens never leave your device for maximum security
Complete Analysis
Decode header, payload, and signature with detailed claim information and time validation
Instant Results
Fast Base64 decoding with real-time validation and formatted JSON display
Mobile Friendly
Responsive design works perfectly on desktop, tablet, and mobile devices
How to Use JWT Decoder
1
Paste JWT Token
Copy and paste your JWT token into the input field. The token should start with "eyJ".
2
Decode Token
Click "Decode JWT" to parse the token and display its header, payload, and signature components.
3
Analyze Contents
Review the decoded information including claims, expiration times, and algorithm details.
Complete Analysis
Decode header, payload, and display signature information with claim details
Time Validation
Check token expiration, issued at, and not before timestamps
Easy Copying
Copy individual sections or formatted JSON with one click
Client-Side Only
All decoding happens locally - your tokens never leave your browser