STEP Viewer
Open and inspect .step files in your browser. Free, no upload, no sign-up.
Open and inspect .step / .stp files in your browser. Rotate, zoom, switch to wireframe and read exact dimensions. Nothing is uploaded.
How to view a STEP file online
- 1Drop the file
Drag your .step file into the box or click to pick it.
- 2Inspect
Orbit with the left mouse button, pan with the right, zoom with the wheel. Toggle wireframe to see the triangles.
- 3Read the numbers
Dimensions, volume and mesh health are shown under the viewport.
About the STEP format
STEP (ISO 10303, files ending in .step or .stp) is the neutral CAD exchange format. Unlike mesh formats it stores exact B-rep geometry: analytic surfaces, NURBS, edges and assembly structure with real units. Every CAD system can export STEP, and it is what you receive from suppliers, McMaster-Carr or GrabCAD.
Commonly used by: SolidWorks, Fusion 360, Onshape, FreeCAD, CATIA, Siemens NX, machine shops
The exact geometry is tessellated into triangles in your browser using OpenCascade (the same kernel FreeCAD uses). You can control the mesh density before exporting. Large assemblies may take a while; the first load downloads a 7 MB engine.