JWT Generator RS256

The tool produces a RS256 JWT by signing a header and payload with an RSA private key. It is intended for developers implementing token-based authentication in APIs and microservices. The process follows RFC 7519 rules: the header and payload are encoded with base64url, then signed to form a three-part token. The output is suitable for use in authorization headers and token-based security schemes. Conceptually, you prepare a header (typically {"alg":"RS256","typ":"JWT"}) and a payload with claims such as iss, sub, aud, exp, and iat, then compute a cryptographic signature using RSA SHA-256. The tool does not perform verification; it only generates the token string. Beneficiaries include backend engineers, DevOps, and security teams integrating with API gateways or identity providers. Unique value lies in exact RS256 compliance, deterministic encoding, and zero-knowledge of key material handling during generation. Use cases include API access tokens, service-to-service authentication, and testing token-based flows in development and CI pipelines. The tool emphasizes standard-compliant token creation, clear input schemas, and a clean JWT output for immediate use in secured requests.