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.

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 ...

According to Adobe, "STL was created by 3D Systems in 1987 as part of their stereolithography printing technology for commercial 3D printers. Since its creation, the STL file format hasn't changed ...