Most sheets are player created/maintained, so either you can contact the game's developers if they have interest in creating one, create one yourself or as others to make one. All sheets are made with html/css and there exist suggestions and help on the roll20 wiki, starting with here and here . Here you can go and look how the html/css for other sheets looks like. Looking at sheets that are similar and using them as basis for your sheet is smarter than making it from scratch I'd say, and finally converting the pdf to html/css is a possibility but is painful and I wouldn't recommend it even if it sounds that it would reduce the work needed. Since November I gone from knowing only little about html to improving one sheet considerably and have created three, so it's doable if you put your mind and work to it. There are several members here who are willing to help out new sheet authors with questions.