Use official binaries from slproweb.com or compile from source with specific flags.
# Check version openssl version -a openssl genrsa -out test.key 2048 Create a self-signed certificate openssl req -new -x509 -key test.key -out test.crt -days 365 Test HTTPS connection to a website openssl s_client -connect google.com:443 Summary For most users: Download from slproweb.com → install → add to Path → verify. how to install openssl windows
Use winget install OpenSSL.OpenSSL for quick setup. Use official binaries from slproweb
openssl version Expected output: