JWT Decoder
Decode a JSON Web Token and inspect its header, claims and expiry.
Input
Settings
Run
Results
Results will appear here once you run the tool.
About JWT Decoder
Decode a JSON Web Token and inspect its header, claims and expiry. Paste or type your text into JWT Decoder, adjust the settings, and the result appears below.
Your files stay on your device. ZyncTools has no upload step: the file is read in your browser, processed there, and handed straight back to you. There is no account, no watermark and no size cap beyond what your own device can hold.
Settings. JWT Decoder gives you control over show raw decoded json.
Also known as: jwt, token, decode, auth, bearer.
How to use JWT Decoder
- Add your input. Paste or type your text into the input box. You can also load a text file from your device.
- Choose your settings. Adjust show raw decoded json to suit what you need.
- Run the tool. The result updates as you type. Press Run to refresh it at any point.
- Save the result. Copy the output, or press Download to save it. Nothing is kept once you close the tab.
Frequently asked questions
Are my files uploaded when I use JWT Decoder?
No. JWT Decoder runs entirely inside your browser. Your text is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.
Is JWT Decoder free?
Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.
Does JWT Decoder work offline?
Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.