JWT Decoder

Inspects JSON Web Tokens (JWTs) to reveal their internal structure, allowing users to break down the token into its three distinct parts: header, payload, and signature. Users input a complete JWT string, and the tool decodes each segment, presenting the raw data for inspection. The interface displays the decoded content of the header, which specifies the algorithm used, and the payload, which contains the actual claims or user information. Additionally, it provides validation capabilities to verify the token's signature integrity against provided keys. Security professionals, developers building authentication systems, and students studying cryptography utilize this utility. It helps users quickly validate whether a received JWT is properly formatted and if its contents have been tampered with since issuance.