Andrey Burkov asked me to let the world know about his website Texify. He’s running mimeTeX, so that you don’t have to. You can use the site to generate images from TeX code for your site. You can link to the site rather than hosting the image yourself, and the site even supports directly encoding TeX into the URL of the image. For example, this image
was generated on the fly by his site from TeX I embedded in the URL.
MimeTeX is a tool that converts TeX formulas into GIFs. We posted about it last year.