View STL files online, free — no install, no sign-up. Orbit, zoom, X-ray, and measure any STL in your browser, then scale, repair, or edit it and export STL, 3MF, OBJ, or GLB.
Drop in an STL to orbit, zoom, X-ray, and measure it — free, no install, no sign-up. And when you want to change something, the same window edits and re-exports it.
Free · Runs in your browser · No account needed
Most online STL viewers only let you spin the model. OwlCAD inspects it and edits it in the same place.
Drag an STL into the browser and it loads on the build plate — orbit, zoom, fit to view, and toggle X-ray to see through the model. Nothing to install.
Measure between any two points, and read the model’s bounding size, volume, and triangle count — the numbers you need before you print.
A plain viewer stops at looking. OwlCAD keeps going: scale to exact dimensions, combine with other shapes, repair non-watertight geometry, and re-export.
STL, 3MF, OBJ, GLB, and STEP all open here, with units detected on import so every model loads at the right size.
View it, measure it, and edit it — all in the browser, no download.
Yes. Drag an STL into the browser and view it in 3D for free — no install, no sign-up. Orbit, zoom, fit to view, and switch on X-ray to see inside the model.
Yes — OwlCAD runs entirely in your browser. Drop in a .stl and inspect it immediately: rotate it, measure between any two points, and read its bounding size, volume, and triangle count.
Yes — unlike a plain viewer, OwlCAD is a full editor. Once your STL is open you can scale it to exact dimensions, combine it with other shapes, repair non-watertight geometry, and export it again.
STL, 3MF, OBJ, GLB, and STEP — units are detected on import, so a model always loads at the right size.