JWT decoder

Parse a token's header and payload without secret validation.

JWT workspace

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Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234",
  "name": "Dev Tools",
  "iat": 1516239022
}

More JWT guides

JWT Decoder Online: Inspect Header and PayloadDecode a JWT online to read its header and payload claims in your browser. No secret needed, nothing uploaded — ideal for quick auth debugging.How to Decode a JWT OnlineDecode a JWT online in seconds: paste the token, read the header and payload, and check claims like expiry, issuer and audience.JWT Header vs Payload: What Goes WhereUnderstand the difference between a JWT header and payload, what each section contains, and why the signature ties them together.How to Decode a JWT Safely in the BrowserWhy decoding JWTs in the browser is safer than server-side tools, what risks remain, and how to inspect tokens without leaking them.Checking JWT Token ExpiryHow to read the exp and iat claims to check when a JWT expires, why timezone confusion causes false alarms, and how to debug expiry issues.JWT Claims Explained: sub, iss, aud, exp and MoreA reference to standard JWT claims — sub, iss, aud, exp, iat, nbf — what each means, and how custom claims fit alongside them.

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JWT decoder is built for the search intent behind "jwt decoder online": a fast, browser-based developer tool that helps with API debugging, data formatting and everyday coding tasks without sign-up.

What this online developer tool is best for

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