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JWT Debugging Tools

Browser-local JWT, Base64, and JSON tools for inspecting token payloads safely.

Inspect token data deliberately

JWT debugging usually means checking claims such as subject, issuer, audience, and expiration. This page groups token decoding with JSON and Base64 helpers.

Decoding is not verification. A decoded payload is readable, but trust still depends on signature verification and the issuer’s security model.

Tools in this group

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JWT Decoder

Decode JWT header and payload locally without verifying the signature.

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Base64

Encode and decode Base64 strings locally.

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JSON Formatter

Format minified JSON into readable two-space indentation.

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JSON Validator

Validate JSON syntax locally and get parse errors.

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