To view a STL file, drop it below. It opens in this page — drag to turn it, scroll to zoom — and is read by your own browser, so it is never uploaded.
Free, unlimited, no account.
Drop a STL file.stl · read in your browser, never uploaded
FormatWhat you are holding
STL file (stereolithography) (.stl)
STL is the lingua franca of 3D printing: a flat list of triangles. No unit, colour, material or history — a cylinder is a fan of flat strips. The missing unit is the classic cause of scale accidents. Every slicer and mesh tool reads it.
No. A STL file is read by your browser on your own machine and drawn in the page. Nothing is sent to our servers, so there is no limit on how many you view.
Is it free?
Yes, with no account and no daily limit, because viewing a mesh costs us nothing.
Can I measure the part?
The viewer shows its overall size along each axis, in the units stored in the file. For distances between features, convert it and open it in your CAD system.
What does the viewer not show?
Colours, textures and materials are not drawn, and every surface is shown as triangles. A mesh holds only triangles, so nothing is lost by showing it this way.