Decode and inspect JWT headers and payloads without sending them anywhere.

Is JWT Decoder free to use?

Yes — JWT Decoder is free to use, with no sign-up, no install and no account.

Does JWT Decoder upload or store my data?

No — JWT Decoder runs entirely in your browser, so your text, files and results never leave your device.

No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.

What is JWT Decoder?: Decode and inspect JWT headers and payloads without sending them anywhere.
Is JWT Decoder free to use?: Yes — JWT Decoder is free to use, with no sign-up, no install and no account.
Does JWT Decoder upload or store my data?: No — JWT Decoder runs entirely in your browser, so your text, files and results never leave your device.
Do I need to install anything to use JWT Decoder?: No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.