OpenSSL - generate localhost *.pem certificate under Windows

In this short article, we want to show how to generate localhost *.pem certificate (+ private key) using openssl command under Windows.

Quick solution (run in cmd.exe):

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openssl.exe req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj '/CN=localhost'

Note: be sure that openssl.exe is added to system paths.

Simple steps:

1. find openssl location path (or install openssl that is available in Git for Windows),
2. open Command Prompt (cmd.exe),

   Hint: motivation to use cmd.exe are freezes that may occur with external terminals.

3. run the following command:
   Copy

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   "C:\Program Files\Git\usr\bin\openssl.exe" req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj '/CN=localhost'

Screenshots: