Convert to CAD formats with advanced options Leave feedback

Supported CAD Formats

The following CAD (Computer-Aided Design) formats are recognized:

Format	Extension	Description
DWG	.dwg	AutoCAD Drawing Database (binary format)
DXF	.dxf	Drawing Exchange Format (ASCII/binary)
DWF	.dwf	Design Web Format (compressed 2D/3D)
DWFX	.dwfx	Design Web Format XPS
DWT	.dwt	AutoCAD Drawing Template
DGN	.dgn	MicroStation Design File
IFC	.ifc	Industry Foundation Classes (BIM)
STL	.stl	Stereolithography (3D printing)
PLT	.plt	HPGL Plot File
IGS	.igs	IGES Drawing File
CF2	.cf2	Common File Format (3D package designs)

Properties

Format - Specifies the desired CAD file format. Available options are: Dwg, Dxf, Dwf, Dwfx, Dwt, Dgn, Ifc, Stl, Plt, Igs, Cf2.

SizeSettings - A PageSizeOptions object that sets the output page size:

PageSize - the page size (A3, A4, Letter, etc.).
PageWidth - custom page width in points. When set, PageSize automatically changes to Custom.
PageHeight - custom page height in points. When set, PageSize automatically changes to Custom.

Note
Starting with version 26.9, the page size is set only through SizeSettings; the PageSize, PageWidth and PageHeight properties directly on CadConvertOptions were removed.

PageNumber - Specifies the starting page number for conversion.

PagesCount - Specifies the number of pages to convert.

API Structure

The following example shows the API structure for CadConvertOptions:

using GroupDocs.Conversion.Options;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

// Create options object
CadConvertOptions options = new CadConvertOptions
{
    Format = CadFileType.Dwg,
    SizeSettings = new PageSizeOptions { PageSize = PageSize.A4 },
    PageNumber = 1,      // Starting page
    PagesCount = 10      // Number of pages to process
};

Conversion Examples

CadConvertOptions supports conversion between CAD formats. The following examples demonstrate common conversions.

DWG to DXF

Convert an AutoCAD DWG file to DXF (Drawing Exchange Format):

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "drawing.dwg";
string outputFile = "drawing.dxf";

using (var converter = new Converter(sourceFile))
{
    var options = new CadConvertOptions
    {
        Format = CadFileType.Dxf
    };
    converter.Convert(outputFile, options);
}

DWG to DWF

Convert a DWG file to DWF (Design Web Format):

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "blueprint.dwg";
string outputFile = "blueprint.dwf";

using (var converter = new Converter(sourceFile))
{
    var options = new CadConvertOptions
    {
        Format = CadFileType.Dwf
    };
    converter.Convert(outputFile, options);
}

Page Size Options

Control output page dimensions through SizeSettings, using a standard page size or custom dimensions:

Using Standard Page Size

Set a standard page size (A4, A3, Letter, etc.):

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "technical-drawing.dwg";
string outputFile = "technical-drawing-a4.dxf";

using (var converter = new Converter(sourceFile))
{
    var options = new CadConvertOptions
    {
        Format = CadFileType.Dxf,
        SizeSettings = new PageSizeOptions { PageSize = PageSize.A4 }
    };
    converter.Convert(outputFile, options);
}

Using Custom Page Dimensions

Define custom page width and height in points:

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "floor-plan.dwg";
string outputFile = "floor-plan-custom.dxf";

using (var converter = new Converter(sourceFile))
{
    var options = new CadConvertOptions
    {
        Format = CadFileType.Dxf,
        SizeSettings = new PageSizeOptions
        {
            PageWidth = 800,   // Width in points
            PageHeight = 600   // Height in points
        }
    };
    converter.Convert(outputFile, options);
}

Format Support Notes

CAD to CAD conversions are supported for select format combinations:

DWG → DXF, DWF
DGN → DXF, DWF
DWT → DXF, DWF
STL → DXF, DWF (limited support)
Other CAD formats → DXF, DWF (varies by format)

Conversions from non-CAD formats (PDF, Word, Excel) to CAD formats are not supported.

Note: To convert FROM CAD formats to PDF or images, use PdfConvertOptions or ImageConvertOptions.

More Resources

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