JWT Decoder & Debugger

Free online JWT decoder and debugger. Decode and inspect JSON Web Token header, payload and claims instantly — nothing leaves your browser.

Use this free online jwt decoder directly in your browser — no installation and no sign-up. All processing happens locally on your device, so it is private, secure and works offline.

Features

• 100% client-side — your data never leaves your browser
• Free and unlimited, no account required
• Works offline as an installable PWA, on desktop and mobile
• Fast, no ads and no tracking

Frequently asked questions

Is this jwt decoder free to use?

Yes. The JWT Decoder & Debugger is completely free with no sign-up, no limits and no ads.

Is my data private and secure?

Yes. Everything runs 100% in your browser — your data never leaves your device, and the tool works fully offline.

Do I need to install anything?

No. It is a browser-based tool that works instantly on desktop and mobile, and can be installed as a PWA for offline use.

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