The free STL Cross-Section to DXF / SVG Outline
Slice an STL, OBJ, 3MF or STEP model at any height or position along X, Y or Z, see the outline, measure section area and perimeter.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
What is the STL Cross-Section to DXF / SVG Outline?
A section outline answers questions a 3D view cannot: how thick is the wall exactly here, how large is the cross-section area for a flow or stress calculation, and what shape do I cut from plywood to make this profile? Load a model, choose the cutting plane (X, Y or Z), slide it through the part and read the outline, area, perimeter and number of holes live.
Export the current section as DXF or SVG, or export a whole stack of evenly spaced sections as one sheet with a layer per slice — ready for laser cutting stacked contour models, topographic terrain, relief carvings and waffle structures. Slicing is exact (edge by edge) and runs entirely in your browser.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Slide the plane through the model with live outline.
Net area with holes subtracted, total cut length, hole count.
N evenly spaced layers in one DXF/SVG sheet.
Warns about open contours (gaps in the mesh).
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This 3d tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
Does it work on assemblies?
Yes, every shell is cut.
What are the axes of the 2-D drawing?
X–Y for Z cuts, Y–Z for X cuts, Z–X for Y cuts.
How accurate is the area?
Exact for the mesh; curved parts depend on triangle density.
Is anything uploaded?
No.
How do I use the STL Cross-Section to DXF / SVG Outline?
1. Drop in a model. 2. Pick the plane axis and move the slider. 3. Check area and perimeter. 4. Download the section or the full layer sheet.
More free tools
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Try the STL Cross-Section to DXF / SVG Outline now
Cut a 3D model with a plane and export the section outline, area and perimeter, or all. Free to use.
Try it free