Dokumenty Google and other 86,400 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
This icon of Google Docs is a piece of paper. It has rounded edges and the top right corner is folded over. On the lower half of the paper are a series of 4 horizontal lines, with the bottom most one being shorter than the others.