JWT Decoder — free online tool
You've got a long token that starts with "eyJ..." and you need to see what's inside it. Maybe you're checking why a login expired, or just want to read what a token actually says. Pasting it into some random website feels risky. We added a free tool that does it — JWT Decoder — right in your browser.
What it does
It decodes a JWT for you and shows the three parts in plain view: the header, the payload, and the expiry. You paste the token, and it pulls out the readable details so you can check what's there and when it runs out.
Nothing leaves your device
The whole thing runs in your browser. Your token is never uploaded to a server and nothing is saved. When you close the tab, it's gone. That matters here, because a token can hold things you don't want to share.
How to use it
- Open JWT Decoder and paste your JWT into the box.
- Read the header, payload and expiry it shows.
- Copy whatever you need from the result.
It's free with no limit. There are more small tools on the Apps page.