@ sohamb03 It looks that it's using ZeroSSL and also requires being registered. @ Krydos When trying to paste LE account key that I've already created in the past with ZeroSSL, it warns me that it's incorrectly formatted. Maybe that's just different prefix?... I'll try to play with it later. After browsing a little bit, personally - on Windows - I found it easy, quick and comfortable to use Win32/Win64 portable client: https://github.com/do-know/Crypt-LE/releases It doesn't require any installation, no dependencies, you just need to type the right command. So it's not web based, I wonder how easy (or not) it will be to instruct some total layman.