There are various compendiums available that provide this. The Monster Manual is the primary one, but there are additional books as well. Try this search to see all 5e options available. <a href="https://marketplace.roll20.net/browse/search?keywords=5e&category=RPG%20Rulebooks:Bestiaries" rel="nofollow">https://marketplace.roll20.net/browse/search?keywords=5e&category=RPG%20Rulebooks:Bestiaries</a>