Online JWT Decoder

A JSON Web Token (JWT) is a compact and URL-safe format for securely transferring claims between two parties. The claims in a JWT are encoded as a JSON object, which serves as the payload of a JSON Web Signature (JWS) structure or as the plaintext of a JSON Web Encryption (JWE) structure. This enables the claims to be digitally signed or integrity protected with a Message Authentication Code (MAC) and encrypted. JWTs are commonly utilized for authentication and authorization purposes, ensuring the secure transmission of information between parties.

JWT(JSON Web Token)는 일반적으로 세 부분을 포함합니다:

• - 헤더: 이것은 일반적으로 두 부분으로 구성됩니다: 토큰 유형(즉, JWT)과 사용 중인 서명 알고리즘, 예를 들어 HMAC SHA256 또는 RSA.
• - Payload: This contains the claims. Claims are statements about an entity (typically, the user) and additional data. There are three types of claims: registered, public, and private claims. Registered claims include predefined claims such as iss (issuer), exp (expiration time), sub (subject), and aud (audience). Public claims can be defined at will by those using JWTs. Private claims are custom claims created to share information between parties that agree on using them.
• - Signature: To create the signature part, you have to take the encoded header, the encoded payload, a secret, the algorithm specified in the header, and sign that. The signature is used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.

The JWT Decoder is a convenient online tool for decoding and verifying JSON Web Tokens. Simply paste a JWT into the input field, and the tool will decode the header and payload, displaying their contents as JSON objects. This tool is helpful for understanding the structure, claims, and signature of JWTs, which is crucial for secure authentication and authorization in web applications.

JSON Web Tokens (JWTs) are frequently utilized for authentication and authorization in web applications. They serve as access tokens, enabling a user to access particular resources on a server following successful authentication. Moreover, JWTs can facilitate single sign-on (SSO) processes, allowing a user to log in to multiple services with a single authentication event. Additionally, JWTs can securely transmit information between two parties, guaranteeing the integrity and authenticity of the data.

JWT를 사용할 때, 그것의 안전한 처리와 저장이 매우 중요합니다. 기억해야 할 몇 가지 안전 고려 사항은 다음과 같습니다:

• - JWT 전송 시 항상 HTTPS를 사용하여 도청과 중간자 공격을 방지하세요.
• - JWT를 클라이언트에서 안전하게 저장하십시오. 예를 들어 HttpOnly 쿠키에 저장하여 교차 사이트 스크립팅(XSS) 공격을 방지하십시오.
• - 무단 액세스를 방지하기 위해 적절한 토큰 만료 및 해지 메커니즘을 구현합니다.
• - RS256(RSA와 SHA-256)과 같은 강력한 서명 알고리즘을 사용하여 위조를 방지합니다.
• - JWT 페이로드의 모든 주장을 검증하여 그 정확성과 진실성을 보장합니다.