To actually see a custom icon in-game, you generally don't download a separate "maker app," but rather modify your game files: Locate Game Files : On Steam, right-click Geometry Dash Properties Installed Files Access Resources : Open the folder to find the PNG sprite sheets containing the icons. Replace Sprites
Geometry Dash doesn't have an official standalone "Icon Maker" app for download, but the community has built several incredible tools to help you design and preview your character. 🛠️ Popular Community Icon Kits geometry dash icon maker download