Developer
JWT Decoder
Decode a JSON Web Token's header and payload without verifying it.
Decoded locally in your browser. Free; nothing is transmitted.
About this tool
Free JWT decoder. Inspect the header and claims of any JWT for debugging. Verification is not performed — never paste production secrets.
Frequently asked questions
Do you verify signatures?
No. This only decodes the token for inspection, which is what you usually need while debugging.
Is it safe to paste my token?
Decoding is local, but treat tokens as sensitive. Redact them in any output you share.
Why can't I decode it?
Paste a full three-part JWT; malformed tokens cannot be parsed.
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