Developer

JWT Decoder

Paste a JWT to decode its header and payload JSON instantly. Useful for debugging authentication tokens, inspecting claims, and verifying token structure.

Signature verification is not performed. Never paste production secrets into untrusted tools.

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Frequently asked questions

Does this tool verify JWT signatures?+

No. This decoder only parses and displays the header and payload. Signature verification requires the secret key and is not performed here.

Is this tool free?+

Yes. Every Utilio utility is free with no sign-up, usage limits, or paywalls.

Do you store my data?+

No. Processing happens entirely in your browser. Your input never leaves your device.

Can I use this tool offline?+

Yes. Once the page loads, most tools continue working without an internet connection.