Following our monthly release process, GroupDocs.Conversion for .NET 18.4 has been released and available for download. This release covers some new features, one improvement and a bug fix. You can specify bookmark, headings and expanded level when converting from Words to PDF and XPS. Grayscale PDF conversion is introduced. Aside these, HTML 5 compliant markup generation is improved. For further details included in this month’s release, please visit the release notes. We’d recommend you to integrate latest version of the API in your application and share your feedback.


Specify bookmark, headings and expanded levelAPI allows to specify bookmark, headings and expanded level when converting from Words to PDF and XPS formats.

Option for creating Linearize PDF when converting to PDF```

var saveOptions = new PdfSaveOptions(); saveOptions.PdfOptions.Linearize = true;

## Implement option for converting to grayscale PDF```
var saveOptions = new PdfSaveOptions();
saveOptions.PdfOptions.Grayscale = true; 

Resource optimization when converting to PDF```

var saveOptions = new PdfSaveOptions();

// all images in the document are re-compressed. The compression is defined by the ImageQuality property. saveOptions.PdfOptions.OptimizationOptions.CompressImages = true;

// value in percent where 100% is unchanged quality and image size. To decrease the image size, use ImageQuality less than 100 saveOptions.PdfOptions.OptimizationOptions.ImageQuality = 50;

// Link duplcate streams saveOptions.PdfOptions.OptimizationOptions.LinkDuplcateStreams = true;

// Remove unused objects saveOptions.PdfOptions.OptimizationOptions.RemoveUnusedObjects = true;

// Remove unused streams saveOptions.PdfOptions.OptimizationOptions.RemoveUnusedStreams = true;

// Make fonts not embedded if set to true saveOptions.PdfOptions.OptimizationOptions.UnembedFonts = true;

## Image watermarkA new property **byte\[\] Image** is introduced.```
byte[] image = System.IO.File.ReadAllBytes ( "image.jpg" );
var saveOptions = new PdfSaveOptions();
saveOptions.WatermarkOptions.Image = image; 


  • Create HTML 5 compliant markup when converting to html

Bug Fixes

  • Index was outside the bound of the array, when cache is enabled and watermarks are applied

API Resources

Here are a few channels and resources for you to download, learn, try and get technical support on GroupDocs.Conversion:


We always welcome you to share your feedback to improve this product. We will be happy to know your thoughts. Just create a forum thread and our dedicated support team will be there to respond.