Kerning is lost when converting to PDF

GemBox.Document
1

Hello,

It appears that font kerning is lost when exporting a .docx document to PDF. Is there way to fix it?

gembox_kerning
gembox_kerning1044×696 31.3 KB

Thanks in advance!

2

Hi Alex,

Please try again with this NuGet package:

Install-Package GemBox.Document -Version 2025.9.103

Note that this is a hidden (unlisted) version. To install it, you’ll need to run the above command on the NuGet Package Manager Console (Tools → NuGet Package Manager → Package Manager Console).

Does this solve your issue?

Regards,
Mario

3

Hi Mario,

sorry, no, it didn’t resolve the issue. I also tried the last 2025.9.108 version, but also no luck

4

Hi Alex,

Please send us the DOCX file that reproduces your issue so we can investigate it.

Regards,
Mario

5

Hi Alex,

Unfortunately, the issue occurs because the two letters are in separate Run elements. Kerning is currently supported only within a single Run when exporting to PDF.

You can test this by placing “AV” in the same Run with identical formatting (for example, remove the highlight on “V” and ensure both letters use the same font).

Supporting kerning across multiple Runs would require a major refactoring of our rendering model, which we unfortunately don’t have the capacity to address now.

Regards,
Mario

6

Hi Mario,

Yeah, clear, thanks for your efforts.