What is a JWT (JSON Web Token)?

JWT (JSON Web Token) is a compact token format used to securely transmit information between parties as a JSON object. Learn more: - [RFC 7519 – JSON Web Token](https://datatracker.ietf.org/doc/html/rfc7519) - [Wikipedia – JSON Web Token](https://en.wikipedia.org/wiki/JSON_Web_Token)

What does this JWT decoder do?

This tool decodes the JWT header and payload so you can inspect claims and metadata for debugging or learning purposes.

Does this tool verify JWT signatures?

No. This tool does not verify the JWT signature or validate the token. It only decodes the readable parts of the token.

Is decoding a JWT the same as decrypting it?

No. JWTs are Base64URL-encoded, not encrypted. Decoding simply converts the token into a readable JSON format. Related concept: - [Base64](https://en.wikipedia.org/wiki/Base64)

Who should use a JWT decoder?

JWT decoders are commonly used by developers to debug authentication flows, inspect token claims, or learn how JWTs are structured.

Is it safe to decode JWTs in this tool?

Yes. All decoding is performed locally in your browser. No tokens are sent to any server or stored.

When should I not use a JWT decoder?

You should not rely on a decoder to validate security or authorization. Always verify JWTs on the server using proper libraries.

FlowTooly

JWT Decoder

Decode JWT tokens instantly in your browser. View header and payload for debugging and inspection without uploading any data.

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