/ step / viewer
STEP viewer
Open a .step or .stp file and see it, with its real dimensions and units. It renders in this tab.
Your file never leaves your browser. STEP, IGES and BREP fetch the OpenCASCADE kernel (2.3 MB over the wire); 3DM fetches rhino3dm (2.5 MB before compression); every mesh and scene format fetches neither. Nothing downloads until you pick a file.what we bundle ↗
estimate · above the measured floor
This will take about
Your file is . STEP parsing measured at across real CAD files, and this machine benchmarked . Nothing has been downloaded yet.
- Kernel to download — OpenCASCADE
- 2.3 MB
- Parse and tessellate
nobody should wait that long without having been told
above 25 MB · may not fit in a browser
This file may be too big for a browser
At this needs roughly here. Whether it fits depends on the geometry, not the size: a large CAD assembly can open, while a much smaller STEP exported from a mesh can run out of memory. If it does, this page says so, and the file never leaves your computer either way.
If it does not open here
the same sourced table as the format page — dated, not invented
we never block the attempt, we only tell you the cost first
rendered locally · — fps
drag to orbit · scroll to zoom · shift-drag to pan
What the STEP dimensions tell you
The dimensions describe the model's overall bounding box. Use them to check its scale or whether it fits in a space. They do not measure individual holes or manufacturing tolerances.
The viewer draws triangles calculated from the STEP surfaces. Facets in the preview do not, by themselves, mean the original file contains faceted CAD geometry. Keep the STEP file when you need its exact surfaces.
If part of an assembly is missing, check whether the export included every component in one file. An assembly that references separate part files needs those files in an application that supports the references. Read more about STEP assemblies.