Free SLDPRT to STL converter
Convert SolidWorks files to STL without SolidWorks.
Got a SLDPRT or SLDASM but no SolidWorks licence? Many SolidWorks files contain a saved display mesh. Caddis reads it and writes a binary STL you can print or view.
Why convert SLDPRT to STL?
SolidWorks files are often shared with people who don't have SolidWorks. Without the software, the saved display mesh is the only geometry you can get from the file.
How to convert SLDPRT to STL
- Choose your SLDPRT or SLDASM file above, or drag it onto the box.
- Check that STL is selected. You can switch to any other output.
- Select Convert. The file downloads straight away. Nothing is uploaded.
Good to know
- This uses the display mesh SolidWorks saved in the file, not the exact solid, so curved faces are faceted at SolidWorks' display quality.
- Files saved without display data can't be converted. Ask the sender for a STEP or STL export instead.
What converts, and what doesn't
- Every output is a triangle mesh. STEP and IFC solids are tessellated for display, so the result is not an editable solid or B-rep.
- When the source names its parts (STEP and IFC assemblies, for example), they become named groups in OBJ. STL, PLY and GLB hold a single combined mesh.
- Colours and materials are not carried over.
- Coordinates keep the source units, except GLB, which is scaled to metres when the source declares its units.
Frequently asked questions
Why does my SolidWorks file fail?
Some files don't contain a saved display mesh. Caddis can't rebuild the geometry without SolidWorks itself, so ask the sender to export STEP or STL.
Is my file uploaded?
No. The file is read and converted by the Caddis engine running inside your browser tab. It is never sent to a server, so confidential drawings stay on your device.
Is it really free?
Yes. There's no account, watermark, page limit or daily quota. The converter runs on your own computer, so it costs us nothing per file.
Need to measure or mark up the drawing too?
The same engine powers the free Caddis viewer on the web and on iPhone. Open DWG, DXF, STEP and STL files, measure, and add markup, all on your device.
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