Hello :) I work in IT and here's what I would put if I were writing it: "WebButtons is a free collection of buttons developed using HTML and CSS." "Browse to find the buttons you would like for your website to copy their HTML and CSS code." Hope this helps :) let me know if you need any other help with IT related English because it can be difficult to get the balance between sounding technically correct and sounding natural.

Hi, Henrique! So your writing is very good. I would probably just mention a couple things regarding your sentences. 1. WebButtons is a collection of free buttons made only with HTML and CSS." I switched the words around simply because it sounds more natural. 2."Browse to find the buttons you want to use on your website and easily copy HTML and CSS code." "Wanna" is more slang-ish, so if you're planning this for your business it may be best to use the full phrase "want to". Also, in English we use the preposition "on" instead of "in" when talking about websites. Oh and one more thing. "I'm creating a website that contains a bunch of creative buttons for web developers so they can easily copy the button code and use it on their websites." Your original sentence made sense, but again this sounds more natural. Hope you have success with your efforts!