HowTo: HTTPS on IIS website with free auto-renewing certificate

Below is an image-based walk-through on how to configure HTTPS on an IIS website, making use of a free certificate for encryption from the non-profit Let’s Encrypt certificate authority, also configuring autorenewal of the certificate.

1) Download the win-acme client application (for the command-line).

There’s also a GUI app called IIS Crypto if you prefer. However, this article uses win-acme tool.

2) Run wacs.exe from the folder where win-acme tool is unpacked.

3) Follow same steps as below selecting your own site and binding.

Just press Q when finished and you’re done. No need to worry about next renewal (mentioned on the screen), will be done automatically.