JWT Debugger
Skill
Encoded
Header: Algorithm & Token Type
Payload: Data
Verify Signature

Privacy

Your data stays in your browser. These tools run entirely client-side. Tokens, PEMs, SAML payloads, Markdown source, and mock-response bodies are never sent to the Secutils.dev server. State that needs to survive a reload (or be shared) lives in the URL fragment (#…), which browsers never transmit to the server.

Anonymous usage analytics. We use Plausible Analytics, a privacy-first, GDPR-compliant tool, to collect aggregate usage data. No cookies, no personal data, no individual tracking. The data is limited to top pages, referral sources, visit duration, and device-class metadata (device type, OS, country, browser). Full details in the Plausible Data Policy.

See the full Secutils.dev privacy policy for details on the wider service.

Credits

This tool is powered by the following open-source libraries:

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