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Decode JSON Web Tokens instantly and securely — entirely in your browser.
JWT Decoder
Decode JSON Web Tokens instantly.
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Why use our JWT Decoder?
Decode Instantly
Instantly parse and decode the Header and Payload of your JSON Web Token.
Fully Private
All decoding happens in your browser. Your token is never sent to any server, keeping your credentials secure.
Works Instantly
No login, no upload, no waiting. Paste your JWT and get the decoded JSON output right away.
What is a JSON Web Token?
How to Decode a JWT
Frequently Asked Questions
Is it safe to decode my JWT here?
Yes. The decoding happens entirely in your browser using JavaScript. No data is transmitted to our servers.
Can this tool verify a JWT signature?
This tool decodes the Header and Payload. Signature verification requires your secret key, which should never be pasted online.
What is a JSON Web Token (JWT)?
A JWT is a secure way to transmit information between parties as a JSON object, commonly used for authentication.