Made it because I sometimes need to diff strings and I never remember how to do it from command line. And partially as an experiment of how important the url is to get traffic.

Any tip on how I should host this site as cheap as possible? It's just html,css,javascript

If you're checking your code into GitHub anyway, you could turn on GitHub Pages [1] for your project and serve it from there.

[1] https://help.github.com/articles/configuring-a-publishing-so...