Board Thread:Support Requests - Designing Your Wiki/@comment-35289850-20200818165331/@comment-9605025-20200818181650

If you don't want to pay, GIMP is a free alternative to Photoshop. I don't know which online compression tools you have been using but some of them are actually very decent. If you used one of the more decent tools and couldn't get it down enough, I don't think Photoshop/GIMP will help. In general, the more colors you have the larger the file has to be. So if you image has a lot of different shades and whatnot, then it may not be possible to get it under 300 KB without loosing quality.