Synvara
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JWT Decoder

Decode JSON Web Tokens locally in your browser instantly.

Encoded Token

Decoded Data

Header (Algorithm & Type)
{
  // Awaiting token input...
}
Payload (Data & Claims)
{
  // Awaiting token input...
}
Verify Signature
hmacSha256(base64UrlEncode(header) + "." + base64UrlEncode(payload), secret_key)

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