JWT Decoder Tool
The JWT Decoder helps you decode JSON Web Tokens and view their header and payload instantly. This tool works entirely in your browser and does not send any data to a server.
It is useful for debugging authentication, inspecting API tokens, and understanding JWT structure.
Use the Tool
Try Real Examples
Header
Payload
What Does This Tool Do?
This tool decodes JWT tokens and extracts useful information such as user data, roles, expiration time, and issued time.
Common Use Cases
- Debug authentication tokens
- Inspect API authorization data
- Check token expiration issues
Real Use Case Examples
1. Debug Login Authentication
Check user roles and ID inside token payload.
2. Token Expiry Issues
Verify exp to see when token expires.
3. API Debugging
Check if correct claims are sent in API requests.
Why Use This Tool?
- No server processing (secure)
- Fast decoding
- Readable JSON format
Frequently Asked Questions
Is this tool secure?
Yes, everything runs locally in your browser.
Can it verify JWT signature?
No, it only decodes the token.
Is it free?
Yes, completely free.