Your 3D printer doesn't read STL files. It reads G-code. This guide shows you how to convert STL to G-code using free slicer software, online tools, and mobile apps, plus the settings and mistakes that matter.
Layer lines ruining your prints? Learn how to sand 3D prints from start to finish — grit progression, wet sanding, material tips, and how to get a smooth result with or without paint.
Find the best free 3D print files from top websites. Learn which file format to download, how to check quality before printing, and the legal rules you need to know.
