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Open a CAD model or drawing

Drag files onto this window, or pick one. Everything is processed locally in your browser; nothing is uploaded.

Drop a file here (for OBJ + MTL or glTF + BIN, drop all files together)

STEP (.step .stp), IGES (.iges .igs), BREP

STL, OBJ + MTL, PLY, 3MF, AMF, OFF, glTF / GLB, FBX, DAE, 3DS, VRML, 3DM

DXF, PDF, SVG

PCD, XYZ, G-code

Left-drag: rotate · Right-drag: pan · Wheel: zoom at cursor · Double-click: zoom to fit Units

Left drag	Active tool: Rotate (default), Pan, Zoom, Zoom to Area or Measure. In 2D drawings left-drag pans.
Middle drag	Rotate. `Ctrl` + middle drag pans, `Shift` + middle drag zooms.
Right drag	Pan. A right click without dragging opens the context menu.
Wheel	Zoom in/out about the cursor.
Click / double-click	Select a component / zoom to fit.
Touch	One finger rotates, two fingers pinch-zoom and pan.

`1`–`6`	Front, Back, Left, Right, Top, Bottom
`7` `8` `9`	Isometric, Trimetric, Dimetric
`Space`	View orientation menu
`F`	Zoom to fit
`Z` / `Shift`+`Z`	Zoom out / zoom in
Arrow keys	Rotate 15° (`Shift`: 90°, `Alt`+←/→: roll, `Ctrl`: pan)
`P` `S` `M` `E`	Perspective, Section, Measure, Explode
`H` / `Shift`+`H`	Hide selection / show all
`Esc`	Close tool, clear selection
`Ctrl`+`O`	Open file

STEP, IGES, BREP	Full B-rep import through OpenCascade (WebAssembly). Assembly structure, colors and true model edges are kept.
STL, OBJ, PLY, 3MF…	Mesh formats through three.js loaders. For OBJ with MTL/textures or glTF with .bin files, drop all files at once.
DXF	Model space with layers, blocks, colors, linetypes, text, hatches and dimensions.
PDF	Drawings exported to PDF open with every page as a sheet in millimetres, sharp at any zoom.
Open Folder	Lists every file in a project folder that the viewer can open.
CAD programs' own files	Files in a CAD program's own format cannot be opened here. Export the model as STEP, or the drawing as DXF or PDF, and open that file.