JWT Debugger — Decode, Edit, and Re-Sign JWT Tokens
Interactive JWT debugger — decode any token, edit payload claims, and re-sign with your secret in real time.
HMAC secret or PEM private key for RS/ES algorithms
Frequently Asked Questions
Interactive JWT Debugging
The JWT Debugger gives you a live editing environment for JSON Web Tokens. Paste any JWT to immediately decode it into its header and payload components. Edit either JSON block and the tool will re-sign the token automatically using the secret you provide.
This workflow is invaluable for development: you can modify expiration times, add or remove claims, change roles, and generate updated test tokens without restarting your server or making API calls.
The re-signing happens entirely in your browser — no data is sent anywhere. If you need to test tokens against a real API, copy the output and use it in your HTTP client.