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Decode and Inspect JWT Tokens

Decode the header and payload sections of a JSON Web Token (JWT) to inspect its claims.

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JWT tips

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JWTs have three parts separated by dots: header.payload.signature. Each part is Base64URL encoded. Decode the first two to inspect claims.

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Base64URL differs slightly from standard Base64: - replaces +, _ replaces /, and padding (=) is omitted. The decoder handles this automatically.

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Never decode a JWT on an untrusted public tool if it contains sensitive data. This tool processes everything locally in your browser.

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The payload contains exp (expiry), iat (issued at), and sub (subject) claims as Unix timestamps. Convert them to see exact expiry dates.

工作原理

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3
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