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slaveoftime
slaveoftime

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ACadSharp.Image: Render DXF and DWG to images in .NET without AutoCAD

#dotnet #csharp #opensource #tooling

If you work with CAD files in .NET, one annoying gap is turning DXF or DWG drawings into images for previews, docs, web apps, or automation.

I recently came across ACadSharp.Image, an open source project built on top of ACadSharp and SixLabors.ImageSharp that focuses exactly on that problem.

It renders DXF/DWG files to common raster formats including PNG, BMP, JPEG, GIF, and WebP, and it does it without requiring AutoCAD.

What stood out to me:

  • It ships as both a .NET library and a CLI
  • You can control width, height, background color, and output quality
  • It supports model space, paper layouts, and viewports
  • You can hide specific layers during export
  • It supports native AOT publishing for standalone binaries

Here is the kind of CLI flow it enables:

cad-to-image "drawing.dxf" --format webp --width 1400 --height 1400 --quality 85
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And a more customized example:

cad-to-image "part.dwg" --format png --width 1800 --height 1200 --background "#0c0c0c"
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This feels especially useful for:

  • generating preview images for CAD repositories
  • producing visual artifacts in CI/CD pipelines
  • embedding drawing previews in internal tools or customer portals
  • building automated documentation workflows

Project link:

https://github.com/slaveOftime/ACadSharp.Image

What I would want to test next is how it behaves on more complex production drawings, but the direction is already very promising for teams that need CAD-to-image automation inside .NET systems.

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