Learn what's new across releases, with details of features, enhancements, and resolved issues.
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GroupDocs.Viewer for Python via .NET V26.9Major versionSep 25, 2026
Features
Added WordProcessingOptions.page_number_location and the WordsPageNumberLocation enum to stamp page numbers on rendered Word documents.
Added WordProcessingOptions.horizontal_resolution / vertical_resolution to set the DPI of PNG and JPEG output for Word documents.
Added support for rendering Microsoft Project files (MPP, MPT, MPX) on Linux and macOS.
Updated GroupDocs.Viewer engine from 26.4 to 26.8.
Updated the embedded .NET runtime from 10.0.0 to 10.0.12.
Removed the libgdiplus / mono-libgdiplus requirement on Linux and macOS.
Ship the same Python API on every platform - The Linux and macOS packages gain ProjectManagementOptions and the Project, Photoshop, Illustrator and OneNote FileType members.
Added docstrings with summaries, parameters and code examples to the Python API.
Added a Developer Guide section to the API reference.
Fixes
Cannot use the package on Python 3.5 - 3.7.
pip installs the package on Linux and macOS versions that cannot run it.
GroupDocs.Viewer for Node.js via Java V26.9Major versionSep 19, 2026
Features
Added Open Fixed-layout Document (OFD) file-format support.
Implemented exposing of annotations in PDF that are hidden by default during rendering.
Added the ability to specify horizontal and vertical resolution in WordProcessing options while rendering WordProcessing documents to raster formats.
Added page numbering for WordProcessing documents during rendering.
Improved viewing archive files with external resource.
Fixes
Archive name is not displayed correctly.
Special characters incorrectly rendered and table borders are missing while converting EML to HTML and raster formats.
Issue with missing comments while rendering PDF.
DOCX to HTML rendering is incorrect with Arabic characters and EnableOpenTypeFeatures option enabled.
EPSF format support is limited. An error occurred while parsing the EPSF file content.
Mismatch between actual dimensions of rasterized archives and calculated by GetViewInfo.
GroupDocs.Viewer for Java V26.9Major versionSep 18, 2026
Features
Added Open Fixed-layout Document (OFD) file-format support.
Implemented exposing of annotations in PDF that are hidden by default during rendering.
Added the ability to specify horizontal and vertical resolution in WordProcessing options while rendering WordProcessing documents to raster formats.
Added page numbering for WordProcessing documents during rendering.
Improved viewing archive files with external resource.
Fixes
Archive name is not displayed correctly.
Special characters incorrectly rendered and table borders are missing while converting EML to HTML and raster formats.
Issue with missing comments while rendering PDF.
DOCX to HTML rendering is incorrect with Arabic characters and EnableOpenTypeFeatures option enabled.
EPSF format support is limited. An error occurred while parsing the EPSF file content.
Mismatch between actual dimensions of rasterized archives and calculated by GetViewInfo.
GroupDocs.Viewer for .NET V26.8Major versionSep 1, 2026
Features
Implemented TFM-Split NuGet Packaging for GroupDocs.Viewer.
Implemented exposing of annotations in PDF that are hidden by default during rendering.
Added the ability to specify horizontal and vertical resolution in WordProcessing options while rendering WordProcessing documents to raster formats.
Added page numbering for WordProcessing documents during rendering.
Fixes
Special characters incorrectly rendered and table borders are missing while converting EML to HTML and raster formats.
Issue with missing comments while rendering PDF.
Bug DOCX to HTML rendering is incorrect with Arabic characters and EnableOpenTypeFeatures option enabled.
EPSF format support is limited. An error occurred while parsing the EPSF file content.
Mismatch between actual dimensions of rasterized archives and calculated by GetViewInfo.
[UI] Groupdocs viewer 8.0.7/8.1.x - Pages not loaded in viewer are not available in print preview.
GroupDocs.Viewer for Node.js via Java V26.5Major versionJun 6, 2026
Features
Added the ability to return mail message properties through specialized view info.
Added support for xml-stylesheet processing instruction.
Improved CSS color parsing and serialization.
Fixes
"Could not load file. File is corrupted or damaged." error during call 'viewer.View' for the DXF file.
Fixed bug with exception while loading specific DXF file to Viewer on Windows only.
Missing Chinese characters when rendering EML to PDF.
Bad performance for some pages when rendering PDF to HTML and PNG.
GroupDocsViewerException while rendering PPT and PPS to any format.
5-digit row numbers overlap right sibling cells and AutoFit is not applied for long textual cells when rendering Spreadsheet to HTML.
WinDing font is not preserving while converting XLS to HTML.
Exception during detection of raw URIs in mail message body.
Default font is not applied when detection and wrapping of raw URIs in mail message body is working.
Unable to cast object of type 'Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities.IfcFacetedBrep'.
GroupDocs.Viewer for Java V26.5Major versionJun 5, 2026
Features
Added the ability to return mail message properties through specialized view info.
Added support for xml-stylesheet processing instruction.
Improved CSS color parsing and serialization.
Fixes
"Could not load file. File is corrupted or damaged." error during call 'viewer.View' for the DXF file.
Fixed bug with exception while loading specific DXF file to Viewer on Windows only.
Missing Chinese characters when rendering EML to PDF.
Bad performance for some pages when rendering PDF to HTML and PNG.
GroupDocsViewerException while rendering PPT and PPS to any format.
5-digit row numbers overlap right sibling cells and AutoFit is not applied for long textual cells when rendering Spreadsheet to HTML.
WinDing font is not preserving while converting XLS to HTML.
Exception during detection of raw URIs in mail message body.
Default font is not applied when detection and wrapping of raw URIs in mail message body is working.
Unable to cast object of type 'Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities.IfcFacetedBrep'.
GroupDocs.Viewer for Python via .NET V26.5Major versionMay 21, 2026
Features
Built the Linux and macOS wheels on GroupDocs.Viewer.CrossPlatform for native cross-platform rendering.
Document per-platform format support - The Project Management family renders on Windows only.
Added a platform note to the in-package AGENTS.md and the Supported File Formats page.
Reviewed and updated related documentation topics.
GroupDocs.Viewer for Python via .NET V26.4Major versionApr 24, 2026
Features
Added Python 3.14 support.
Starting with this release, the pip package bundles a machine-readable AGENTS.md file at groupdocs/viewer/AGENTS.md. AI coding assistants that scan installed packages (Claude Code, Cursor, GitHub Copilot, and others) can discover the API surface, usage patterns, and troubleshooting tips without any extra configuration.
New documentation page - Agents and LLM Integration (MCP server, machine-readable docs, AI pipelines).
Public API expansion - Added new font-inspection API, stream-factory interfaces, drawing enums, search options, and format-specific *ViewInfo results.
Reviewed public API.
Simplified wheel distribution: four wheels per release (Windows x64, Linux x64, macOS Intel, macOS Apple Silicon).
GroupDocs.Viewer for .NET V26.4Major versionApr 22, 2026
Features
Added the ability to return mail message properties through specialized view info.
Added and implemented support of HorizontalResolution and VerticalResolution for SpreadsheetOptions.
Added support for xml-stylesheet processing instruction.
Improved CSS color parsing and serialization.
Fixes
'"Could not load file. File is corrupted or damaged."' error during call 'viewer.View' for the DXF file.
Fixed bug with exception while loading specific DXF file to Viewer on Windows only.
Missing Chinese characters when rendering EML to PDF.
Bad performance for some pages when rendering PDF to HTML and PNG.
GroupDocsViewerException while rendering PPT and PPS to any format.
5-digit row numbers overlap right sibling cells and AutoFit is not applied for long textual cells when rendering Spreadsheet to HTML.
Wingding font is not preserving while converting XLS to HTML.
Exception during detection of raw URIs in mail message body.
Default font is not applied when detection and wrapping of raw URIs in mail message body is working.
Unable to cast object of type 'Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities.IfcFacetedBrep'.
[UI] Viewer doesn't load document with lot of 404s for /get-page calls.
[UI] GroupDocs viewer (8.1.3) - Problems with print loader popup.