JWT Generator Generate signed JSON Web Tokens with custom claims, algorithm selection, and expiration.

A JWT Generator is a tool that creates JSON Web Tokens, which are used to authenticate and verify users in web applications. Developers use it to generate tokens with custom payloads, expiration times, and secret keys, solving the problem of securely transmitting information between parties without having to store sensitive data on the server-side. Specifically, it helps developers create JWTs for testing or debugging purposes, eliminating the need to set up a full authentication system.

The tool is different from others in its class because it allows users to select from three HMAC signing algorithms: HS256, HS384, and HS512, via the Web Crypto API, providing flexibility in terms of security requirements. It also automatically adds issued-at (iat) and expiration (exp) claims to the payload, ensuring that generated tokens follow the standard RFC 7519 format. Additionally, it enables users to customize the payload with any JSON claims and set expiration times in hours.

It supports client-side crypto operations using SubtleCrypto, allowing for secure token generation without exposing sensitive data to the server. Users can create a JWT token by entering their secret key, customizing the payload, and selecting an algorithm, making it a useful jwt maker or jwt builder for developers who need to generate jwt tokens quickly and securely. The generated tokens are standard-compliant and suitable for use in OAuth 2.0 and API authentication scenarios, allowing developers to focus on implementing stateless auth in their modern apps rather than worrying about the intricacies of JWT generation.