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Radio buttons are blurry when converting XLSM to HTML in .NET

Radio buttons look blurry when converting the attached file to HTML with GroupDocs.Viewer 21.8.
Please see the attached XLSM and HTML(generated by the Viewer) for comparison.
Excel radio buttons look blurry.zip (704.5 KB)

        using (var viewer = new Viewer(documentPath))
            var options = HtmlViewOptions.ForEmbeddedResources("output_viewer{0}.html");
            options.SpreadsheetOptions = GroupDocs.Viewer.Options.SpreadsheetOptions.ForOnePagePerSheet();

The issue does not happen with GroupDocs.Conversion (21.8).


We’ve reproduced this issue at our end. The issue ID in our bug-tracker is VIEWERNET-3538. We’ll let you know in case of any updates.

1 Like


GroupDocs.Viewer for .NET v21.10 that includes fix for this issue has been published. You can find the new version at

Have a nice day!