STL Viewer

Open, rotate, pan, zoom, and section binary or ASCII STL meshes directly in the browser.

No STL file loaded. Choose a file or drop one into the viewer.

Section plane

Enable section cut

Plane orientation

Plane positionZ

Visible half

Z at or above planeZ at or below plane

Positions use the coordinates stored in the STL. STL files do not declare physical units. The cut is intentionally uncapped so back-facing and internal surfaces remain visible.

Open or drop an STL fileClick here for the file picker, or drag a .stl file anywhere into this view.

Left drag: rotate · Right drag: pan · Wheel: zoom · View cube: drag or click to snap · Double-click: reset

Section inspection: choose a principal plane, enable the cut, move it through the mesh, and choose which half remains visible. Exterior faces are gray; visible back-facing surfaces are orange to make the opened interior easier to interpret.