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JWT Decoder

Decode a JSON Web Token to inspect its header and payload.

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What is JWT Decoder?

JWT Decoder is a free, browser-based tool that lets you convert or generate data with the jwt decoder in seconds — no software installs, no account, and no file size limits for typical use. Everything runs locally in your browser tab, so your content is never uploaded to a server, making it fast, private, and safe to use for work or personal projects.

How do I use the JWT Decoder?

  1. Type or paste your text into the input box.
  2. Adjust any available options to match what you need.
  3. Click the “Run” button and get your result instantly.
  4. Copy or download the output — no sign-up required.
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Frequently Asked Questions

Yes. JWT Decoder is completely free, with no usage limits, watermarks, or sign-up required.
Yes. JWT Decoder processes everything directly in your browser. Your files and text are never uploaded to a server, so nothing leaves your device.
No installation is needed. JWT Decoder works instantly online in any modern web browser, on desktop or mobile.
Yes — your original input stays in the input box, so you can edit it and re-run the tool at any time.