JWT Debugger

Decode and inspect your JSON Web Tokens securely in your browser.

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How to debug JWT?

1. Paste

Paste your base64 encoded JWT string.

2. Decode

Our tool instantly parses the JSON payload.

3. Verify

Check claims and expirations securely.

Frequently Asked Questions

It helps developers to decode, inspect, and verify the contents of a JSON Web Token payload and header.

Yes! Our tool runs entirely in your browser (client-side). No token data is ever sent to our server.

It supports standard Base64URL encoded JWT strings consisting of three parts (Header, Payload, Signature).

Ensure your token has three parts separated by dots (.) and that it is a valid Base64 encoded string.

Absolutely! This JWT debugger is 100% free and requires no subscription or login.

Yes, our interface is fully responsive and optimized for mobile devices.