Compare STL vs OBJ vs STEP: The Ultimate Guide to 3D Printing File Formats
Last Updated: 15 Sep, 2025
So, you’ve designed a brilliant 3D model and you’re ready to bring it to life. You hit “export” and are immediately confronted with a dropdown menu of file formats: STL, OBJ, STEP, AMF and 3MF. Which one do you choose? If you simply go with the default, you might be sacrificing print quality, color, or even the ability to easily edit your design later.
At the heart of this technology are CAD (Computer-Aided Design) file formats, which act as the bridge between digital 3D models and physical printed objects.
CAD File Formats at FileFormat.com
Computer-aided design (CAD) applications are used by professionals like architects, engineers, drafters, artists and others to create precision drawings or technical illustrations. CAD software can be used to create two-dimensional (2-D) drawings or three-dimensional (3-D) models. These models are represented by a number of CAD file formats for storage and display on computer systems. FileFormat.com is your one stop for guidance about such file formats. Its unique combination of file format wiki, news and support forums gives you the opportunity to get knowledge about file types and engage in fruitful discussions with file format community.