1. IronPDF
  2. Troubleshooting
  3. Font Kerning

Fixing Font Kerning Issues in IronPDF

This issue specifically affects the WebKit version (<=2021.3.1) of our library. Font kerning issues with system fonts such as Arial and Arial Bold are caused by faulty kerning within the Windows system fonts. To address this issue, we recommend transitioning to a later version of IronPDF. Starting from version (>=2021.9.3678), we introduced Chrome Engine rendering, which offers improved compatibility and resolves these font kerning issues.

Workaround

Please remove the system font and download a new font (such as ArialMT) from an online resource. Then, link this font into the HTML using @font-face:

@font-face { 
    font-family: 'ArialMT Regular'; 
    font-style: normal; 
    font-weight: normal; 
    src: local('ArialMT Regular'), url('arialmt.woff') format('woff'); 
    }

Replace font-family: Arial; with font-family: ArialMT Regular; in your HTML, and then render the PDF.