Online JWT Encoder and Decoder
Decode a JSON Web Token to view its header, payload, and signature, or encode your own for testing auth flows. Free, private, browser-based.
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Why use our JWT Tool?
Privacy First
We believe in developer privacy. Unlike other JWT tools that might log your tokens, our logic runs 100% in your browser. Your sensitive data never touches our servers.
Bidirectional Tool
Whether you need to debug an existing token or create a mock JWT for your local development environment, our encoder and decoder handles both effortlessly.
Frequently Asked Questions
Can I decode JWTs without uploading them?
Yes. JWT parsing and verification are handled in-browser so token content is processed locally during use.
Does the tool support signed JWT generation?
Yes. You can generate tokens with supported algorithms and inspect decoded claims in the same workflow.
Is this tool free online?
Yes. This is a free online tool and you can use it without registration.
Is this tool free to use?
Yes. This is a free online tool and you can use it anytime without registration.
Is my data private?
Your input is processed with privacy in mind, and sensitive content is not shared with third parties.
Does it work on mobile?
Yes. The tool is responsive and works on modern phones, tablets, and desktop browsers.