JWT Decoder
JWT FAQ
What is a JWT?
A JSON Web Token (JWT) is a secure way to transmit information between parties, consisting of a header, payload, and signature.
Is it safe to decode JWTs online?
Yes, if decoding is done locally in your browser (like this tool). The token never leaves your device.
Can I verify a JWT with this tool?
No, this tool only decodes JWTs. To verify authenticity, use your backend with the correct secret or public key.
What are JWTs used for?
They are commonly used for authentication, authorization, and secure information exchange in modern web apps.
About JSON Web Tokens (JWT)
A JSON Web Token (JWT) is a compact, URL-safe way to represent claims between two parties. It consists of three parts: a header, a payload, and a signature. JWTs are commonly used for authentication and secure information exchange.
This tool allows you to decode JWTs instantly in your browser. All decoding is done client-side, ensuring your data never leaves your device.
Note: This tool does not validate signatures. Always verify JWTs in your backend using the correct secret or public key.