JWT decoder
Read a JSON Web Token's header and payload, see when it expires, and check an HS256 signature with your secret.
Paste a JWT to start.
- 1Paste a token.
- 2Read the header, payload and dates.
- 3Optionally check the signature with your secret.
- Does my data leave my device?
- No. Everything you paste or open is processed in your browser and stays on your device.
- Does it work offline?
- Yes. Once this page has loaded, it keeps working without an internet connection.
- Is there a size limit?
- No limits from us. Very large inputs can be slow because the work uses your device's memory.
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