How to view PLT files

PLT and HPG formats are based on the plotter language developed by Hewlett-Packard (HP-GL). These formats are designed for sending information to plotter printers, contain text/binary instructions on HPGL language to draw vector images on paper.

How to view PLT files

The PLT/HPG can be opened with desktop applications like e.g. Autodesk AutoCAD.

In case you need to view a PLT/HPG file in a browser or in a standard image or PDF viewer application, you can convert it to HTML, JPEG, PNG  PDF format with GroupDocs.Viewer for .NET. 

Convert PLT to HTML

To convert PLT/HPG files to HTML with GroupDocs.Viewer for .NET use following code:

using (Viewer viewer = new Viewer("sample.plt"))
{
       HtmlViewOptions options = HtmlViewOptions.ForEmbeddedResources("output.html");
       //options.CadOptions = CadOptions.ForRenderingByScaleFactor(0.7f); // Render image and reduce it by 30%
       //options.CadOptions = CadOptions.ForRenderingByWidthAndHeight(400,400); // Render image and set output size to 400x400
       //options.CadOptions = CadOptions.ForRenderingByWidth(500); // Render image, fix width by 500 px and recalculate height
       //options.CadOptions = CadOptions.ForRenderingByHeight(500); // Render image, fix height by 500 px and recalculate width

       viewer.View(options);
}

The following screenshot shows the output HTML file opened in a browser.

Convert PLT to JPG

To convert PLT/HPG files to JPG with GroupDocs.Viewer for .NET use following code: 

using (Viewer viewer = new Viewer("sample.plt"))
{
       JpgViewOptions options = new JpgViewOptions("output.html");
       //options.CadOptions = CadOptions.ForRenderingByScaleFactor(0.7f); // Render image and reduce it by 30%
       //options.CadOptions = CadOptions.ForRenderingByWidthAndHeight(400,400); // Render image and set output size to 400x400
       //options.CadOptions = CadOptions.ForRenderingByWidth(500); // Render image, fix width by 500 px and recalculate height
       //options.CadOptions = CadOptions.ForRenderingByHeight(500); // Render image, fix height by 500 px and recalculate width

       viewer.View(options);
}

The following screenshot shows the output JPG file opened in a Windows Photo Viewer application.

Convert PLT to PNG

To convert PLT/HPG files to PNG with GroupDocs.Viewer for .NET use following code:

using (Viewer viewer = new Viewer("sample.plt"))
{
       PngViewOptions options = new PngViewOptions("output.html");
       //options.CadOptions = CadOptions.ForRenderingByScaleFactor(0.7f); // Render image and reduce it by 30%
       //options.CadOptions = CadOptions.ForRenderingByWidthAndHeight(400,400); // Render image and set output size to 400x400
       //options.CadOptions = CadOptions.ForRenderingByWidth(500); // Render image, fix width by 500 px and recalculate height
       //options.CadOptions = CadOptions.ForRenderingByHeight(500); // Render image, fix height by 500 px and recalculate width

       viewer.View(options);
}

The following screenshot shows the output PNG file opened in a Windows Photo Viewer application.

Convert PLT to PDF

To convert PLT/HPG files to PDF with GroupDocs.Viewer for .NET use following code:

using (Viewer viewer = new Viewer("sample.plt"))
{
       PdfViewOptions options = new PdfViewOptions("output.pdf");
       //options.CadOptions = CadOptions.ForRenderingByScaleFactor(0.7f); // Render image and reduce it by 30%
       //options.CadOptions = CadOptions.ForRenderingByWidthAndHeight(400,400); // Render image and set output size to 400x400
       //options.CadOptions = CadOptions.ForRenderingByWidth(500); // Render image, fix width by 500 px and recalculate height
       //options.CadOptions = CadOptions.ForRenderingByHeight(500); // Render image, fix height by 500 px and recalculate width

       viewer.View(options);
}

The following screenshot shows the output PDF file opened in a browser.

More resources

View CAD Drawings Online

Along with full-featured .NET library we provide simple but powerful free online Apps. View DXF, DWG, and DWF files online with GroupDocs Viewer App.

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples: