STL, 3MF & STEP viewer
See your 3D file.
Then make it fit.
Free online viewer for STL, 3MF and STEP files. The file is opened right in your browser — viewing uploads nothing. Check size, volume and weight — and if it doesn’t quite fit, edit it below.
Doesn’t fit? Say what to change.
Fit it to your pipe, add a wall mount, make it stronger — the assistant edits the model and checks it still prints and holds.
Free to try · Free account to download · By pressing “Design my part” you accept the Terms of use. Privacy policy
Short breakFull for todayOffline
Live status →The part designer is taking a short break. Today’s free designs are used up. The part designer is offline right now.
Back soon. New ones open tomorrow. We’re on it. Leave your e-mail and we’ll write once when you can start.
Is my file uploaded?+
Not for viewing: the viewer reads the file in your browser, STEP files too. Only when you press “Design my part” is the file sent to our server, so the assistant can edit it — see the privacy policy.
How is the weight calculated?+
From the closed volume of the mesh, as a solid part in PLA (1.24 g/cm³) and PETG (1.27 g/cm³). With infill, the printed part is lighter.
Can I open STEP files?+
Yes, .step and .stp — right in your browser, like STL. The first STEP takes a few seconds longer to open.
How big will it print?+
The size box above shows it, in millimetres and inches, before you print. STL files carry no units, so compare it with the real thing: if a part meant to be 50 mm shows as 2 mm, it was exported in inches — scale it by 25.4 in your slicer.