JWT Decoder & Debugger Online — Inspect Token Claims
Decode JSON Web Tokens, inspect header, payload claims, and check expiry status.
FAQ
JWT Debugger — frequently asked questions
Does it verify the token's signature?
No. It decodes the header and payload and shows the expiry status. Verifying a signature needs your secret key, which you should never paste into a website.
Is it safe to paste a real token?
Decoding happens in your browser and nothing is sent anywhere. Still, avoid pasting live production tokens where you do not need to.
Are my input uploaded or stored anywhere?
No. JWT Debugger runs in your browser, so your input stay on your device and are never sent to our servers or saved anywhere.
Is JWT Debugger really free? Do I need to sign up?
Yes, it is completely free. There is no account, signup, watermark or email to hand over; open the page and use it as often as you like.
More free tools: JSON Formatter · Base64 Encoder/Decoder · URL Encoder/Decoder · All developer tools
QUICK GUIDE
How to use JWT Debugger & Inspector
- Paste or type your input.
- Choose any options you need.
- See the result instantly below.
Privacy
This tool runs in your browser. No data is ever sent to a server.