Dear GroupDocs customers,
We are pleased to announce the release of GroupDocs.Conversion for .NET v26.6. This release centers on richer conversion event support — introducing font-substitution notifications, a unified events aggregator, and customizable image handling for PDF-to-Markdown — while strengthening conversion accuracy and stability with RTL auto-detection, form-control handling, and fixes for PDF, image, and spreadsheet outputs.
Key New Features
OnFontSubstituted Event: Receive real-time notifications whenever a source document font is replaced, enabling applications to log, replace, or adjust rendering for Word, Excel, PowerPoint, PDF, PCL, TeX, and Diagram files.
ConversionEvents Aggregator: Manage all conversion-related events through a single, typed aggregator with per-call-wins precedence, simplifying configuration and reducing scattered event-handling code.
Custom Image Extraction for PDF → Markdown: Hook into the conversion process to extract images and insert custom placeholders, eliminating the need for post-conversion parsing.
Major Improvements & Fixes
Added RTL auto-detection for DOCX documents lacking proper bidi markup, ensuring correct text flow and layout without manual intervention.
Honored form controls and prevented overlapping text in Spreadsheet-to-PDF conversions when using SkipEmptyRowsAndColumns.
Introduced a NuGet package split for more flexible dependency management.
Fixed corrupted characters appearing in JPEG/TIFF output.
Resolved a hang when converting certain XFA PDFs to image that produced no result.
Fixed a “Unable to load Aspose.PDF” error when converting Publisher documents.
Breaking Changes
Event names have been renamed and the event aggregation model has changed. The old per-document OnConversionCompleted is now OnDocumentConverted, OnConversionFailed is now OnDocumentFailed, and the by-page events are now OnPageConverted / OnPageFailed. Existing per-result event properties and fluent chain methods, along with ConverterSettings.Listener and IConverterListener, are obsolete and will be removed in v26.9. They remain functional in v26.6 but emit compiler warnings. Please review the full release notes for migration examples.
Useful Links
Full Release Notes – View the complete list of changes and technical details.
Download from NuGet – Update your project to the latest version.
Product Documentation – Explore guides and API references.
If you rely on conversion events, font substitution, or PDF-to-Markdown workflows, we highly recommend upgrading to this version for improved flexibility and stability. Note the breaking changes above if you currently use the legacy event APIs.
As always, we value your feedback. Please let us know if you have any questions or feature requests for our upcoming releases!
Best regards,
The GroupDocs Team