![]() ![]() Switch (output.Length % 4) // Pad with trailing '='sĬase 0: break // No pad chars in this caseĬase 2: output += "=" break // Two pad charsĬase 3: output += "=" break // One pad charĭefault: throw new System. A valid JWT can consist of just the header and payload sections. payload (often referred to as body) signature. First, let's understand the structure of a JWT: header. Output = output.Replace('_', '/') // 63rd char of encoding In this tutorial, we'll decode and verify the integrity of a JWT. Output = output.Replace('-', '+') // 62nd char of encoding ![]() You should validate the token in your server-side logic by using something like express-jwt, koa-jwt, Owin Bearer JWT, etc. IMPORTANT: This library doesn't validate the token, any well formed JWT can be decoded. Thanks to Kalten, here's the solution for my case: JwtTokenContent ReadJwtTokenContent(string token) 23 Versions jwt-decode is a small browser library that helps decoding JWTs token which are Base64Url encoded. (content is eyJJZCI6IjUyYjg3ZTUwLTViYmMtNDE0Ny1iOTMwLWY2ZGI0ZTUyNDEwYiIsIlVzZXJuYW1lIjoiZGF0dm1Ab3V0bG9vay5jb20iLCJpc3MiOiJodHRwczovL2xvY2FsaG9zdDo0NDMyMi8ifQ) The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.ĮyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJJZCI6IjUyYjg3ZTUwLTViYmMtNDE0Ny1iOTMwLWY2ZGI0ZTUyNDEwYiIsIlVzZXJuYW1lIjoiZGF0dm1Ab3V0bG9vay5jb20iLCJpc3MiOiJodHRwczovL2xvY2FsaG9zdDo0NDMyMi8ifQ.4wKxDCwQ6onvNA_atndSitGjufR-tXutWq-tRNhqKzc The final part is the signature, and it helps you ensure that a given token wasn't tampered with because signing JWTs requires either a secret or a public/private key pair agreed on previously. JWT Decoder is a free online developer tool to decode a JSON Web Token (JWT) instantly to view the claims inside, such as the algorithm used to sign it and. In a login scenario, this would be information about the user. How can I decode the payload? It doesn't seem to be just a base64 string. While the payload (or the body) carries information about a given asset. JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a. string jwtDecode(string jwt, string key, string algorithm, bool ignoreSignature false). Return JsonSerializer.Deserialize(jsonPayload) The function decodes a JSON Web Token (JWT). Exception here, it's not a valid base64 string JwtTokenContent ReadJwtTokenContent(string token) I think parsing the payload content should be simple enough to just write it in a method. I'd like to know a simple way to read the token payload content without adding additional dependency because I don't need the other information and don't need to validate the token. I am writing the client app with Blazor that has access to a JWT. ![]()
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