Tools→Developer→JWT Decoder

JWT Decoder

Paste any JWT to instantly decode its header and payload into readable JSON with an expiry/validity check. Safe for inspecting real tokens because decoding happens locally.

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Frequently Asked Questions

Do you see my token?

No. Decoding is 100% local — the token never leaves your browser.

Does it verify the signature?

No. It only decodes header and payload. Signature verification requires the secret, which the tool deliberately never asks for.