Cadence
Play the levels from your own copy of Geometry Dash in the browser, with physics matched to the real game step for step.
Your game folder
Drop the Geometry Dash folder here, or choose it.
Steam on Mac: right-click Geometry Dash in your library, Manage, Browse local files, then drop the app. On Windows, drop the Geometry Dash folder.
Your game files stay on this device: the page reads only the sprite sheets, icons and levels it needs, and never uploads them. Online levels, songs and (if you log in) your account requests go to the game's servers through this site's relay, which passes them on without storing or logging anything.