Free online STEP file viewer

Open a STEP or STP file in your browser and turn it around in 3D. It's free, there's no account to make, and the file is never uploaded.

Open a STEP file or see a manual made from one

What you can do with it

Orbit, pan and zoom, or jump to the front, top, right or isometric view.
Browse the assembly tree, find parts by name, and hide parts to see inside.
Show the colours saved in the file.
Open STEP (.step, .stp), IGES (.iges, .igs) and BREP (.brep) files.

Your file stays on your computer

The viewer reads the file in your browser, with the Open CASCADE geometry kernel compiled to WebAssembly. It isn't sent to us or to anyone else. Security and your files says exactly what is and isn't sent.

Free, with no account

Viewing needs no sign-up. The free plan keeps one file in your browser at a time; to open another, the studio offers to delete the one that's there.

When you need a drawing of it

The same file can become an exact hidden-line drawing or an exploded view, exported as SVG, PDF or PNG. The free plan makes one drawing at a time, of up to 250 parts. Balloons, parts lists and step-by-step assembly manuals are on Pro.