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JWT Decoder

Decode and inspect JSON Web Tokens — view header, payload claims, and expiry status. Runs entirely in your browser.

✓ FreeNo loginInstant results

JWT Token

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

HeaderCopy

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

PayloadCopy

{
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022
}

⚠ This tool only decodes JWTs — it does not verify the signature. Never share secret keys.

How it works

A JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. JWTs consist of three Base64URL-encoded parts: header (algorithm & type), payload (claims), and signature. This tool decodes the header and payload sections and checks the exp claim for expiry — it does NOT verify the signature.

Paste your JWT token

View decoded header and payload

Check expiry and copy claims

🪙JWT Decoder

JWT Decoder

How it works