How to use
01
Paste your JWT
Drop a JSON Web Token in the box.
02
Inspect
We decode the header and payload instantly.
Why JWT Decoder
- 100% client-side. Your tokens never leave your browser.
- Reveals header, payload, and signature parts.
- Highlights expired tokens via the exp claim.
Common questions
Does this verify the signature?
No. JWT verification requires the signing key. Use a server-side library for that.
Is it safe to paste tokens here?
Yes, everything happens in your browser. We don't transmit your token.
Is JWT Decoder free to use?
Yes. JWT Decoder is completely free. There is no sign up, no trial, and no usage cap.
Do I need an account to use JWT Decoder?
No. You can start using JWT Decoder straight away. We do not ask for an email address or a login.
Is my data uploaded to a server when I use JWT Decoder?
No. JWT Decoder runs entirely inside your browser, so the code or data you enter never leaves your device and nothing is sent to us.
Do you store the code or data I use with JWT Decoder?
No. Because everything happens locally in your browser, there is nothing for us to store. Close the tab and it is gone.
Can I paste minified or messy code into JWT Decoder?
Yes. JWT Decoder handles compact, minified, or untidy input and processes it the same way.
Does JWT Decoder flag errors in my input?
Where it applies, JWT Decoder points out where something looks invalid so you can fix it quickly.
How do I use JWT Decoder?
Enter or paste your code or data and JWT Decoder updates the result as you go. When it looks right, copy or download it with one click.
Does JWT Decoder work on phones and tablets?
Yes. JWT Decoder is responsive and works in any modern browser on mobile, tablet, and desktop.
Which browsers does JWT Decoder support?
It works in current versions of Chrome, Firefox, Safari, and Edge. For the best experience, keep your browser up to date.
Is there a limit on how often I can use JWT Decoder?
No. You can use JWT Decoder as many times as you need, at no cost.
Can I use JWT Decoder for commercial or client work?
Yes. You are free to use the output in personal, educational, and commercial projects.
Why is JWT Decoder free?
The site is supported by advertising, which lets us keep every tool free and open to everyone.
What should I do if JWT Decoder gives an unexpected result?
First check that your code or data is formatted as expected. If something still looks wrong, use the feedback link on the page and we will take a look.