Tools > JWT Decoder
JWT Decoder
Decode JWT token header and payload
JWT Token
🔒 This tool runs in your browser only. No input data is sent to any server.
About JWT Decoder
JWT Decoder parses and displays the header and payload of JSON Web Tokens without needing a secret key. View claims like issuer, expiration time, and custom data at a glance. The tool also shows real-time token expiration status to help you debug authentication issues.
How to Use
- Paste your JWT token into the input field.
- The header and payload are decoded and displayed instantly.
- Check the expiration status indicator (valid/expired).
- Copy individual sections (header or payload) as needed.
Key Features
- Decode JWT header and payload without a secret key
- Real-time expiration status indicator with countdown
- Display all standard claims (iss, exp, iat, sub, etc.)
- Copy decoded header and payload separately