What's wrong with MS Word/OpenOffice/LibreOffice? You might need an updated CV every couple of years and who knows if other web-based tools still exist then.
I've never enjoyed making my CVs in a text-processor. Maybe I have the wrong idea of a CV, but I'd like it to be somewhat pretty and also maintainable. I really wish that jsonresume.org takes off and to finally have one standard that works everywhere. Whether a web app dies or not.