Is my input sent to a server?

No. The tool runs in your browser and does not upload the values you enter.

Do I need to install anything?

No. localkit works directly in a modern web browser.

JWT Decoder

Decode a JWT into header and payload. Signature verification is not performed. Everything runs in your browser.

Signature verification is not performed. Do not enter secrets.

JWT

Decoded Result

0 chars

Related Tools

Base64 Encoder / Decoder
URL Encoder / Decoder
JSON Formatter
UUID Generator

What is JWT Decoder?

Split a JSON Web Token into header, payload, and signature, and inspect exp, iat, and nbf claims as dates. Signature verification is intentionally not performed.

How it works

JWT Decoder runs locally in your browser. You can paste data, inspect the result immediately, and keep sensitive values off external servers.

Privacy

Input and output values are not sent to localkit servers. Browser storage is used only for interface preferences such as theme and recently used tools.

FAQ

Is my input sent to a server?: No. The tool runs in your browser and does not upload the values you enter.
Do I need to install anything?: No. localkit works directly in a modern web browser.