Learn what's new across releases, with details of features, enhancements, and resolved issues.
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GroupDocs.Merger for .NET V26.9Major versionSep 29, 2026
Features
You can now merge Excel rows from multiple files into a single sheet.
You can now apply the PageBuilder page selection to the first TIFF document.
An exception is now thrown when SetLicense cannot find the license file.
You can now reject an empty license stream in SetLicense.
A clear exception is now thrown when joining an image or audio file into an unsupported format.
Dropped System.Drawing.Common from the cross-platform packages and reported missing dependencies clearly.
Fixes
Close the source file after Merger opens or joins a document by path.
Call the stream factory only once when constructing Merger.
Fixed corrupt DOC output when joining PDF or XPS documents into DOC from multiple threads.
Apply a page orientation change to every page when no page numbers are specified.
Honor the requested preview Width and Height in every document format family.
Reject ExtractPages and RemovePages called with no page numbers instead of silently producing an empty or unchanged document.
Fixed Visio documents intermittently failing with ArgumentNullException trueTypeFont when processed concurrently.
Fixed PDF portfolios failing with NullReferenceException when an embedded file has no modification date.
GroupDocs.Merger for .NET V26.7Major versionAug 1, 2026
Features
GroupDocs.Merger.LowCode: A new low-code edition is now shipped as a separate NuGet package with seven single-purpose, individually licensed products - JoinPdf, JoinDocx, JoinPptx, SplitPdf, SplitDocx, SplitPptx and RemovePagesPdf. Each performs one document operation through a minimal API: construct the object with the source document and operation inputs, then call Save.
Aspose.Drawing dependency removed: Eliminated the external library from the package, reducing binary size and avoiding version conflicts, which simplifies deployment and improves runtime stability.
GroupDocs.Merger for Python via .NET V26.6Major versionJun 2, 2026
Features
Rebuilt the Python binding - A typed, per-overload API with bundled .pyi stubs.
Updated Python 3.14 support (Requires-Python is now >=3.5,<3.15).
Page-preview rendering (generate_preview) and stream-based split are now callable from Python via page-stream callbacks.
Now ships AGENTS.md inside the package for AI agent / LLM integration.
GroupDocs.Merger for .NET V26.4Major versionApr 30, 2026
Features
Continuous Page Numbering in Word Merges - Page number fields now continue sequentially across merged Word documents when using Continuous mode, delivering accurate pagination in the final output.
Per-TFM NuGet Packages - Distribution is now split per target framework, allowing developers to reference only the packages that match their .NET version, which reduces package size and simplifies restore operations.
Streamlined Deployment Across .NET Targets - The new per-TFM packaging improves compatibility with .NET 6, .NET 7, .NET 8, and .NET Framework, enabling faster and more reliable integration into diverse projects.
GroupDocs.Merger for Java V26.4Major versionApr 14, 2026
Fixes
Merge PDF is doubling in size when using GroupDocs PDF Merge.
GroupDocs.Merger for Java V25.12Major versionJan 20, 2026
Features
Improved preservation of accessibility metadata when merging tagged PDFs.