Open every 3D file on your PC. No upload, no account, no internet. Open3D opens 22 file formats in seconds. Drop a model, drag to orbit, get to work. Looking for a Windows 3D Viewer replacement? Microsoft removed its built-in 3D Viewer app in June 2026. Open3D opens the same files plus 16 formats Microsoft never supported. SUPPORTED FORMATS • GLB, GLTF — the web's 3D standard, used by Sketchfab and Khronos • STL, 3MF, AMF — 3D-printing meshes • G-code (.gcode, .gco) — preview your sliced toolpath before printing • OBJ — the universal mesh format, with .mtl and texture support • FBX — Maya, Blender, Unreal, Unity, with rigs and animation • PLY — point clouds from photogrammetry, LiDAR, 3D scans • PCD, XYZ — point clouds from LiDAR and scanners • DAE (Collada) — SketchUp, Daz, older Blender • 3DS — legacy Autodesk • VRML (.wrl) — classic 3D web and CAD export format • VTK (.vtk, .vtp) — scientific and simulation meshes • DXF, DWG — AutoCAD drawings (2D plans render top-down) and 3D entities • STEP / STP — SolidWorks, Fusion 360, CATIA, Onshape • IGES / IGS — CAD interchange standard • BREP — OpenCASCADE solid models • FCStd — FreeCAD projects, with part colours • 3DM — Rhino models • IFC — BIM building models from Revit, ArchiCAD and more NEW: AI Tools (MCP), experimental Connect Open3D to Claude Desktop, ChatGPT/Codex, Cursor, Windsurf, Zed or Antigravity in one click. Your AI assistant can open your 3D files, take screenshots, measure, drop pins and even edit meshes, all locally on your PC. Off by default; turn it on in Settings → AI Tools. TOOLS THAT EARN THE INSTALL • Measure — click two points, get the real-world distance in mm or inches • Cross-section — slice through the model along X, Y or Z with a precise slider • Print-readiness check — manifold, normals, volume and dimensions • High-detail CAD — smoother curves and fillets for STEP, IGES, BREP, FreeCAD and IFC • Render modes — Solid, Wireframe, X-ray • Real HDR lighting — 5 image-based scenes for accurate reflections • Lighting console — ambient, hemisphere, directional and HDR intensity sliders • 6 solid-color backgrounds plus 5 HDR scenes • Screenshots and animated GIF capture • Auto-rotate, real-scale grid BUILT FOR • 3D-printer owners — STL, OBJ, 3MF, AMF with manifold and thickness checks before you slice, plus G-code preview after • CAD pros — STEP, IGES, BREP, FreeCAD, Rhino, DXF, DAE load with no conversion step • Game designers — GLTF, FBX with rigs and animation tracks • Architects — IFC/BIM models, DXF floor plans, STEP and IGES building elements • Photogrammetry and 3D scanning — PLY, PCD and XYZ point clouds rendered as proper splats WINDOWS INTEGRATION • Right-click any .glb, .stl, .step, .ifc, .3dm, .dxf, .obj file in Explorer and "Open with Open3D" • Set Open3D as the default handler for any supported format • Files load instantly from local disk — no cloud round-trip PRIVACY YOU CAN VERIFY Your files never leave the device. The viewer is fully local — open your network activity tab while loading a model and nothing crosses the wire. No accounts, no sign-up, no model uploads, no usage tracking on your files. A 3D viewer that respects your work. OPEN3D vs MICROSOFT 3D VIEWER Microsoft 3D Viewer was removed in June 2026. Open3D opens everything Microsoft 3D Viewer did, plus STEP, IGES, IFC, Rhino, FreeCAD, DXF, G-code and more — formats Microsoft never supported. Free, no sign-up, no telemetry. Drop a file and try it. Open3D Viewer is an independent product and is not affiliated with the Open3D open-source library (open3d.org).

Opens GLB, GLTF, STL, OBJ, FBX, PLY, 3MF, STEP, IGES, DXF, DAE, 3DS, DWG Point-to-point measurement in real-world units Cross-section any axis to inspect interiors 100% offline — zero network, zero account Free, no ads, no in-app purchases HDR lighting for accurate reflections Wireframe, X-ray, and solid render modes Right-click "Open with" for any 3D file in Explorer Print-readiness check for STL and 3MF Export STL or GLB — convert any supported model (OBJ, PLY, 3MF, FBX, DAE, 3DS, STEP, IGES, DXF) into a 3D-printable STL or a portable GLB. Works with your AI assistant: connect Claude, ChatGPT or Cursor in one click (MCP) to open, view, measure and fix 3D files, experimental

• AI Tools (MCP) for Claude, ChatGPT, Cursor and more (experimental) New formats: IFC (BIM), Rhino 3DM, FreeCAD, BREP, G-code, AMF, VRML, VTK, PCD and XYZ point clouds. New High-detail CAD option in Settings for smoother curves in STEP, IGES, BREP, FreeCAD and IFC. Big IFC building models are much faster to orbit.