Generate a Certificate Signing Request (CSR) with a single curl command — no OpenSSL installs, no config files, no signup, no API key. The CSR and private key are returned as JSON. Open-source and MIT-licensed, with example scripts in curl, Bash, Python, and JavaScript. Free with a per-IP rate limit. The same domain also hosts a CSR decoder, SSL check, and certificate expiry monitor. Never fight openssl req flags or a misformatted -subj value again.