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How it works
Paste a JWT and its header and payload are Base64URL-decoded and pretty-printed. Decoding happens locally — the token is never sent anywhere. Note: the signature is not verified.
Frequently asked questions
Is my data private?
Yes. The JWT Decoder runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the JWT Decoder free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on developer tools and the rest of the platform, you can use it as often as you like.
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