JWT Decoder
Decode the header and payload of a JWT and check its expiry time. The signature is not verified.
JWT Decoder
Decode the header and payload of a JWT and check its expiry time. The signature is not verified.
About this tool
Privacy
What you enter is calculated on this device and never sent to a server.
How to use
- Enter numbers or paste text in the box above, and pick any options you need.
- The result appears right away. Generators (UUID, password) make a new one each time you press the button.
- Copy the result and paste it wherever you need it.
Frequently asked questions
Does it verify the signature?
No. It decodes the header and payload and tells you whether the token has expired (exp), but it does not verify the signature. The token never leaves your browser.
Is the JWT Decoder free?
Yes. It is free with no sign-up, no install and no usage limit. It runs right in your browser.
Is what I enter sent to a server?
No. Everything is calculated on your device, and nothing you type is sent or stored. Only the currency converter downloads the latest exchange rates.
Does it work on a phone?
Yes. It works in any modern browser on phones, tablets and computers, so there is no app to install.