PEM Generator Online

This tool generates PEM-formatted cryptographic artifacts for development, testing, and automation workflows. Primary users include software developers, DevOps engineers, QA testers, and security engineers who need TLS-ready material without a full PKI. Typical use cases include local service authentication, API client TLS testing, and mock environments in CI pipelines. Outputs are PEM blocks suitable for OpenSSL-compatible tooling and containerized apps. The tool does not perform CA signing or trust establishment; artifacts are intended for testing and integration only.

Core workflow: the user selects a key type (RSA or EC), a size or curve and provides subject fields (CN, O, C). They may set a validity period and optional passphrase. The tool then generates a key pair, and, if requested, a self-signed certificate or a Certificate Signing Request (CSR). It outputs PEM blocks for the private key, the certificate or CSR, and optional public key. For advanced scenarios, SANs may be included, and private keys can be exported in PKCS#8 format or encrypted with a passphrase. Outputs are PEM-encoded and OpenSSL-compatible.

Value and differentiators: the tool focuses on developer-friendly PEM artifact generation with strict adherence to PEM and X.509 formatting rules, ported to CI and local dev environments. It supports RSA and EC, standard subject fields, SANs, and multiple output options without requiring external network access. Typical users benefit by reducing setup time, avoiding manual certificate creation mistakes, and enabling repeatable test setups. Limitations include no production PKI capabilities, no trust anchor management, and no storage or key management features beyond in-session exports.