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CAD file viewer
Open a 3D model or drawing in your browser to check its size, volume, weight, or cut length. Free, no sign-up, and your file never leaves your computer.
About this viewer
Open CAD files and drawings right in your browser to check their size and shape before you send them anywhere, with no CAD program needed. It opens STEP and STP, IGES and IGS, and BREP files from CAD programs; STL, OBJ, and 3MF files from CAD programs and 3D printing slicers; and DXF and SVG drawings for laser cutting and routing.
Is my file uploaded when I open it?
No. The viewer runs entirely in your browser, and your file never leaves your computer. It's only uploaded if you choose "Get a quote for this part" and submit the quote form.
Why is my model the wrong size?
STL and OBJ files don't store their units, and many CAD programs export them in millimeters. If your model looks 25 times too large, switch the file units to millimeters. STEP, IGES, and most DXF files record their units, so the viewer reads them automatically.
Can I open STEP, IGES, or DXF files?
Yes. The viewer opens STEP and STP, IGES and IGS, and BREP files from CAD programs, plus DXF and SVG drawings, along with STL, OBJ, and 3MF. STEP and IGES files are read with the same geometry engine many CAD programs use, so the size and volume match your design. The first CAD file takes a few seconds while the reader loads.
What does the viewer show for a DXF drawing?
The drawing from above, with its overall size, the total length of every line to be cut, and how many separate shapes it has. Those numbers drive the price of laser cutting and routing: a longer cut and more separate shapes take more time.
How is the volume calculated?
From the triangles of the model, exactly, as long as the model is a closed solid. If it has holes in its surface, the viewer tells you the volume can't be measured.