Learn what's new across releases, with details of features, enhancements, and resolved issues.
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Document Solutions for PDF .NET v9.1.4Aug 8, 2026
Fixes
Fixed an issue where `GcPdfDocument.RemoveDuplicateImages()` could incorrectly deduplicate distinct image XObjects, resulting in incorrect image substitution in the generated PDF.
Corrected a packaging issue affecting the digital signatures of the included assemblies.
Document Solutions for PDF .NET v9.1.3Jul 10, 2026
Fixes
Fixed an issue where a PDF file could be rendered incorrectly in a multithreaded environment.
Fixed an issue where applying a redaction annotation on a scaled (enlarged or reduced) page created from a specific PDF threw System.InvalidOperationException.
Fixed an issue where TrueType (TTC) and WOFF fonts were incorrectly embedded in the generated PDF when 'FontEmbedMode' was set to 'EmbedFullFont', causing rendering issues in some browsers.
Document Solutions for PDF .NET v9.1.2Jun 25, 2026
Fixes
Fixed an issue where saving a PDF containing a specific GIF image caused the application to crash with an access violation.
Document Solutions for PDF .NET v9.1.1Jun 5, 2026
Fixes
Fixed Metadata.Clone() to return a proper deep copy instead of a reference to the original object.
Fixed an issue where hidden PDF annotations could become visible after loading and saving a PDF.
Fixed an issue where GcPdfDocument.Load() could hang indefinitely when loading a corrupted PDF file instead of throwing an exception.
Use more appropriate fallback fonts when exporting PDFs without embedded fonts to images, matching the rendering behavior of Adobe Acrobat and other PDF viewers.
Document Solutions for PDF .NET v9.1.0Major versionMay 5, 2026
Features
Added GcPdfDocument.JavaScripts property: Gets the dictionary of document level JavaScript actions.
Added AcroForm.CalculationOrder property: Gets or sets the array of fields that are recalculated whenever the value of any field changes.
Document Solutions for PDF v9.0.0Major versionJan 6, 2026
Features
Added GcPdfDocument.Optimize() method: optimizes the document and saves it to a file or a stream.
Added OptimizeDocumentOptions class: represents options controlling the behavior of the GcPdfDocument.Optimize() method.
Fixes
Fixed an issue where the AcroForm field hierarchy was generated incorrectly when loading certain PDF files.