JWT Decoder

What is JWT Decoder?

The JWT Decoder is a free online tool that instantly decodes JSON Web Tokens (JWTs) and displays their header, payload, and signature in a readable format, all within your browser. JWTs are widely used in modern web applications for authentication and authorization — they are returned by login APIs, OAuth providers, and single sign-on systems. When debugging authentication issues, verifying token claims, or checking expiration times, you need to quickly inspect what is inside a token without writing code. This tool decodes any JWT in one paste, showing you the algorithm, token type, user claims, expiration timestamp, and all other payload fields in a clean, formatted view. All decoding happens locally in your browser so your tokens are never transmitted anywhere.

Why Use DevBench JWT Decoder?

DevBench JWT Decoder runs entirely in your browser — your data never leaves your device. No sign-up, no limits, no watermarks, completely free forever.

How to Use JWT Decoder

1. Paste your JWT token into the input field
2. The tool automatically decodes and displays header and payload
3. View algorithm, token type, and expiration time
4. Check token claims and user data
5. Verify token structure and validity

Examples

• Decode JWT from API authentication response
• View user claims and permissions in JWT payload
• Check JWT expiration time before making API calls
• Debug JWT authentication issues
• Inspect JWT structure for security analysis

Use Cases

• Debugging JWT authentication in web applications
• Inspecting JWT tokens from API responses
• Verifying JWT claims and permissions
• Checking JWT expiration times
• Analyzing JWT structure for security audits
• Testing JWT-based authentication systems
• Troubleshooting OAuth 2.0 implementations
• Inspecting JWT tokens in mobile apps
• Debugging single sign-on (SSO) systems
• Analyzing JWT tokens for compliance

Frequently Asked Questions