JWT Decoder
Decode JWT header and payload sections locally without verifying or uploading the token.
Frequently asked questions
Is this tool free?
Yes. Calchemy tools are free to use in your browser.
Is my data uploaded?
No. The tools are designed to run locally in your browser unless clearly stated otherwise.
Does this verify JWT signatures?
No. This tool decodes JWT content for inspection only; it does not verify signatures.
Should I paste sensitive tokens?
Avoid pasting production secrets into any website. This tool runs locally, but caution is still best.