Encode & Decode
JWT Decoder
Decode and inspect JWT headers, claims and expiry.
Signature is NOT verified — this tool only decodes the token so you can inspect it. Everything stays in your browser; the token is never sent anywhere.
No token yet
Paste a JWT above to inspect its header, payload and claims.
About this tool
Decode JSON Web Tokens locally to read the header and payload, with exp, iat and nbf claims as readable dates. The signature stays in your browser, unverified.
- 1Paste a JWT to split it into header, payload and signature.
- 2Each segment is Base64URL-decoded and pretty-printed in your browser.
- 3Time claims (exp, iat, nbf) are rendered as readable local dates.
- 4The signature is shown but not verified — this tool never contacts a server.
Private by design
Everything runs locally in your browser. Your text, files and images are never uploaded to a server — the entire tool works offline once the page has loaded.
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