If you want to create new 3D models in STL format or edit an existing STL model, you need dedicated third-party software that lets you open and modify such files. If you are looking for one such ...

Free tool Tinkercad makes it a snap for first-timers to create 3D objects for printing. ... Design > Download for 3D Printing and you'll immediately get an STL file you can load into your printer.

The first thing you need to know is what file formats are compatible with 3D printing. There are many types of 3D printing files, but the most common ones are STL, OBJ, and 3MF.

A file with .stl extension is a 3D graphic file native to Stereolithography technology. Stereolithography is basically a type of 3D printing technology to create 3D models.