Essential Studio® for Document Processing - v32.1.19 Release Notes

v32.1.19

December 16, 2025

Test Results: 225445 Success , 0 Failure

PDF Library

.NET PDF Library

Features

Added support for creating PDF/X-1a:2001 compliant documents in cross platform.
I729871 - Added support for Tesseract 5.0 in OCRProcessor for enhanced OCR capabilities. The default Tesseract engine has been switched from Tesseract 4 to Tesseract 5.
Enhanced OCR accuracy by introducing advanced image preprocessing techniques to improve overall image quality.

Bug Fixes

I787984 - Resolved performance issues when applying redactions to PDFs.
I792069 - Resolved an issue where signature fields were not preserved correctly.
I784271 - Fixed an issue where text appeared incorrectly after converting a PDF to PDF/A.
I786824 - Fixed a preservation issue that occurred when flattening measurement annotations using the FlattenFields method.
I789882 - Resolved an exception that occurred while merging documents on the .NET Core platform.
I787852 - Resolved an exception that occurred during document merge for a specific PDF.
I787134 - Fixed an issue where PDF text alignment did not work for Unicode fonts.
I792491 - Resolved an issue where the exported annotation JSON file was not in the proper format.

Word Library

.NET Word Library

Features

I367969, I376279, I389546, I503392, I565136, I601288, I649136, I649139 - Added fallback font support for 38 additional scripts during Word to PDF and image conversions.
I152052, I244274 - Provided support for an API that retrieves the list of font names used in a Word document.
I772020, I386089, I407397, I414301, I472276, I500715, I79626, I90898, I101804, I127647, I127846, I176098, I176319, I205772, I221064, I226099, I230572, I243331, I295569, I299325, I300942, I301802, I302341, I314928, I322594, I340962, FB35361, F149459, F145497, F149459, F163690 - Provided support for Id, Class, Descendant, Compound and Element selectors during HTML-to-Word conversion.
Upgraded SkiaSharp and SkiaSharp.HarfBuzz to v3.119.1 in DocIORenderer to convert Word to PDF/Image.
Provided support to preserve Waterfall, Sunburst, TreeMap, Box and Whisker, and Pie of Pie charts during Word to PDF and Image conversions.
Improved the performance of Word to PDF and Image conversions.

Java Word Library

Features

I152052, I244274 - Provided support for an API that retrieves the list of font names used in a Word document.
I645070, I678676, I720322, I740673, I749759, I761352, I763240, I766310, I763732, I763731 - Improved accuracy of Word document comparison by adopting the Longest Common Subsequence (LCS) algorithm.

Excel Library

.NET Excel Library

Features

Added support for rendering the Sunburst chart during chart-to-image conversion.
Added support for rendering the Pie of Pie chart during chart-to-image conversion.
Added support for rendering the Waterfall chart during chart-to-image conversion.
Added support for rendering the Treemap chart during chart-to-image conversion.
Added support for rendering the Box and Whisker chart during chart-to-image conversion.
Improved memory usage for creating, reading, and saving Excel documents.
Upgraded SkiaSharp to version v3.119.1 in XlsIORenderer for improved Excel to PDF/Image conversions.
#I779149 - Introduced the LockText property to enable or disable text editing within shapes when the worksheet is protected.
#I785389 - Added the KeepLeadingZeros property to preserve or remove leading zeros when loading CSV documents.

Bug Fixes

#I788599 - Conditional formats with multiple cell references are now rendered correctly in Excel to PDF conversion.
#I781132 - Exception is no longer thrown when using template markers with nested ExpandoObject collection.

PowerPoint Library

.NET PowerPoint Library

Features

Added fallback font support for 38 additional scripts during PPTX to PDF and image conversions.
Provided support to preserve Waterfall, Sunburst, TreeMap, Box and Whisker, and Pie of Pie charts during PPTX to PDF and Image conversions.
Upgraded SkiaSharp and SkiaSharp.HarfBuzz to v3.119.1 in PresentationRenderer to convert Presentation to PDF/Image.

PDF Viewer

Web PDF Viewer (Javascript, Angular, React, Vue, ASP.NET Core & MVC)

Features

#I628857 - Implemented Redaction support in the PDF Viewer.
#I249427 - Implemented Extract Page support in Page Organizer.
Enhanced Print preview performance, achieving up to 80% improvement.

Bug Fixes

#I788313 - Resolved an issue where free text justify alignment was not working properly.
#I249427 - Resolved an issue where the post button was enabled even after clearing the text in comment panel.
#I788308 - Resolved an issue where the free text border overlapped with text when changing the thickness.
#I790733 - Resolved an issue where annotation toolbar items were not visible when enableDesktop API was set to true on devices with smaller widths.
#I791260 - Resolved an issue where the comment panel did not open on double-click when the enableDesktop API was set to true on smaller-width devices.
#I791261 - Resolved an issue where free text annotation color changed to black in the downloaded document when FillColor in freeTextSettings was set to transparent.
#I788326 - Fixed an issue where the previousText value in the annotationPropertiesChange event was incorrect when updating annotation text from the Comments panel.
Resolved an issue where the signature was rendered twice in the same field after updating other form fields.
#I783067 - Resolved an issue where page became unresponsive when findTextAsync was executed for non-existent words.
#I783922 - Resolved an issue where programmatically updating the isChecked property for a checkbox field did not work on non-rendered pages.
#I780028 - Resolved an issue where the last added reply was missing after exporting the sticky note annotations.
#I783430 - Resolved an issue where form fields were not visible when opening a PDF document with exactly 100 pages.
#I779883 - Fixed a script error that occurred after completing measurement annotations with the provided document.
#I782204 - Fixed an issue where annotation property sliders were hidden when toolbarSettings was applied.
#I790584 - Resolved an issue where the previousText value in the annotationPropertiesChange event was incorrect when double-clicking an existing annotation and adding a new annotation.
#I788882 - Resolved an issue where sticky note annotations were not locking properly on non-rendered pages.

Blazor PDF Viewer

Features

Implemented Organize Pages functionality to manage PDF page organization, including insertion, deletion, rotation, import ,extract and zoom page tile in the Blazor PDF Viewer.
Enhance the Annotation Toolbar refinement by dynamically displaying options that are relevant to the currently selected annotation tools for Blazor PDF Viewer

Bug Fixes

#I758901 - Resolved an issue where the EditAnnotationAsync not works properly in non-rendered pages to update the properties in specific cases.
#I197480 - Corrected the Dutch localization for the ‘PdfViewer_Close’ key in the PDF Viewer.
#I754720 - Resolved issues where reply comments were hidden and comment selection did not navigate to readonly annotations in the Blazor PDF Viewer.
#I772426 - Resolved issue where Screen Reader read content in the PDF Viewer very slowly, improving accessibility performance.
#I780530 - Resolved an issue where an exception occurred when double-clicking a FreeText annotation while the toolbar was not injected of the PDF Viewer.
#I782463 - Resolved an exception that occurred during double-tap and other interactions with FreeText annotations on mobile devices of the PDF Viewer.
#I775862 - Resolved an issue where an annotation was deleted when pressing the Delete or Backspace key inside the comment panel editor of the PDF Viewer.
#I70547 - Resolved an issue where resizing a Dynamic Stamp annotation to a smaller size caused its content to be cropped after reloading the saved document in the PDF Viewer.
#I790134 - Resolved an issue in the PDF Viewer’s Form Designer property panel where the transparent color option was not available in the color picker.
#I790845 - Resolved the issue that loading PDF document as byte array using LoadAsync is not working in PDF Viewer.

.NET MAUI PDF Viewer

Features

#FB69267 - Provided support to view a comprehensive list of all PDF annotations and manage comments for each annotation directly within the viewer.
Provided support for AnnotationsLoaded event, which is raised after all existing annotations in the PDF have completed loading.
Provided support for redaction in the PDF Viewer, including text-based, selected-area, and page-based redaction, allowing users to securely hide sensitive content from PDFs.

DOCX Editor

Web DOCX Editor (Javascript, Angular, React, Vue, ASP.NET Core & MVC)

Bug Fixes

#I781421 - Fixed the issue where paragraph formatting was lost after pressing Enter when Track Changes was enabled.
#I779125 - Fixed a script error that occurred while exporting the document as DOCX.
#I775775 - Fixed the issue where white space appeared when opening the attached document.
#I778025 - Fixed a script error that occurred when opening a document containing chart elements.

Blazor DOCX Editor

Bug Fixes

WPF DOCX Editor

Bug Fixes

I791489 - Line spacing applied via the Paragraph dialog was reflected correctly when a theme was applied.

Spreadsheet Editor

Web Spreadsheet Editor (Javascript, Angular, React, Vue, ASP.NET Core & MVC)

Features

#I766184 - Introduced rich, threaded cell comments, featuring reply, edit, delete, and resolve actions. Includes visual indicators, a dedicated review pane for streamlined collaboration, and a comprehensive API for creating, updating, and managing comment threads.
#I766095, #I766088 - Added lightweight, non-threaded cell notes, designed for quick annotations with ribbon controls for easy navigation and visibility
toggling. Provides full API support for integration and automation.
#I764457 - Enhanced chunk processing, triggering the beforeOpen event for each chunk request to enable per-chunk header customization.

Blazor Spreadsheet Editor

Features

Introduced Autofill series, extending patterns and formats horizontally or vertically. This enhancement supports numbers, dates, and custom lists, while preserving formatting, respecting selection direction, and maintaining applicable cell formatting for efficient and consistent data entry.

Introduced Number Formatting, ensuring consistent numeric display using the ribbon’s Number Format dropdown. Predefined formats Currency, Percentage, Date, and Time-enhance readability and interpretation and can be quickly applied across selections for a professional, uniform presentation.

Code Example:

  <button @onclick="FormatAsCurrency">Format as Currency</button>

  <SfSpreadsheet @ref="SpreadsheetReference" DataSource="DataSourceBytes" AllowNumberFormatting="true">
      <SpreadsheetRibbon></SpreadsheetRibbon>
  </SfSpreadsheet>

  @code {
      public SfSpreadsheet SpreadsheetReference;
      public byte[] DataSourceBytes { get; set; }

      private async Task FormatAsCurrency()
      {
          // Applies professional currency format to current selection
          await SpreadsheetReference.NumberFormatAsync("\"$\"#,##0.00");
      }
  }

#I742767, #I790466 - Added Merge cells functionality, enabling adjacent cells to be merged for creating headers, grouping data, and refining layouts. The feature supports alignment and formatting with predictable validation for overlapping or partial selections. APIs are available to merge or unmerge by selection or range and integrate seamlessly with import/export workflows.

Code Example:

  <button @onclick="MergeCell">Merge Cell</button>
  <button @onclick="UnMergeCell">UnMerge Cell</button>
    
  <SfSpreadsheet @ref="SpreadsheetReference" DataSource="DataSourceBytes" AllowMerge="true">
      <SpreadsheetRibbon></SpreadsheetRibbon>
  </SfSpreadsheet>

  @code {
      public SfSpreadsheet SpreadsheetReference;
      public byte[] DataSourceBytes { get; set; }
    
      private async Task MergeCell()
      {
          // Merges the range using the specified MergeType: Cells, Across, or Centre.
          await SpreadsheetReference.MergeAsync(MergeType.Cells, "D4:F8");
      }
      private async Task UnMergeCell()
      {
          // Unmerges the merged cell at D4 and restores individual cells.
          await SpreadsheetReference.UnmergeAsync();
      }
  }

#I618842 - Provided Cell borders and Grid lines customization, allowing custom borders to be applied to cells or ranges to highlight sections and improve readability. Presets include outline, inside, and all borders, with options for line style, color, and thickness. Grid lines are toggle able via UI or APIs, and settings persist through import/export.

Code Example:

  <button @onclick="ApplyBorders">Apply Outside Borders</button>

  <SfSpreadsheet @ref="SpreadsheetReference" DataSource="DataSourceBytes">
      <SpreadsheetRibbon></SpreadsheetRibbon>
  </SfSpreadsheet>

  @code {
      public SfSpreadsheet SpreadsheetReference { get; set; }
      public byte[] DataSourceBytes { get; set; }

      private async Task ApplyBorders()
      {
          // Applies thin black outside borders to the current selection
          await SpreadsheetReference.SetBordersAsync(BorderType.OutsideBorders, ExcelLineStyle.Thin, "#000000");
      }
  }

#I770758, #I780645, #I784392, #I788342 - Added support for programmatic saving, enabling files to be downloaded using the SaveAsync method with customizable SaveOptions such as file name. Additionally, spreadsheet content can be saved as a MemoryStream via the SaveAsStreamAsync method.

Code Example:

  <button @onclick="DownloadExcel">Download as Excel</button>
  <button @onclick="SaveToServer">Save to Server</button>

  <SfSpreadsheet @ref="SpreadsheetReference" DataSource="DataSourceBytes">
      <SpreadsheetRibbon></SpreadsheetRibbon>
  </SfSpreadsheet>

  @code {
      public SfSpreadsheet SpreadsheetReference { get; set; }
      public byte[] DataSourceBytes { get; set; }
    
      private async Task DownloadExcel()
      {
          // Triggers an immediate browser download of the current workbook as "Report.xlsx"
          await SpreadsheetReference.SaveAsync(new SaveOptions
          {
              FileName = "MyReport",
              SaveType = SaveType.Xlsx
          });
      }
      private async Task SaveToServer()
      {
          var stream = await SpreadsheetReference.SaveAsStreamAsync();
          // Use the stream for further processing (send to API, cloud, etc.)
      }
  }

PDF Library

JavaScript Library

Features

Introduced a new Syncfusion JavaScript PDF library to create, load, manipulate, and save PDFs. This release brings a comprehensive set of features for working with PDF documents:
Create PDF documents from scratch with ease.
Load, edit, and save existing PDF files.
Open and manipulate password-protected PDF documents.
Enhance PDFs by adding text, images, shapes, and other graphical elements.
Add and manage interactive components such as bookmarks, annotations, and form fields.
Flatten form fields and annotations for a finalized document.
Import and export form field data and annotations seamlessly.
Merge multiple PDFs or split a document into separate files.
Apply text watermarks, image watermarks, and watermark annotations.
Insert hyperlinks for both web and document navigation.
Add, remove, or modify bookmarks for better document organization.
Create, remove, and flatten layers within PDFs.
Design and apply templates for consistent layouts and branding.
Digitally sign PDF documents for secure authentication.
Extract or redact text from PDF files.
Extract images from PDF documents.
Redact shapes to protect sensitive graphical content.

For more details and step-by-step instructions, refer to our User Guide.

Visual Studio Extensions

Syncfusion Document SDK Extension

Features

Syncfusion has introduced Document SDK Extension enabling developers to build Blazor applications using powerful document processing components for PDF, Excel, Word, and PowerPoint without relying on Microsoft Office or Adobe tools.
With ready-to-use templates and code generator, developers can quickly configure projects and insert Document SDK component code directly into Razor files.

Syncfusion PDF Viewer SDK Extension

Features

Syncfusion has introduced PDF Viewer SDK Extension which helps to create Syncfusion application based on the platform selection such as Blazor, .NET MAUI, WPF and Windows Forms using Syncfusion PDF Viewer SDK component.
The Blazor PDF Viewer SDK Code Generator inserts component code directly into Razor files, auto-configuring namespaces, styles, and NuGet references.
Windows Forms and WPF item templates allow easy integration of PDF Viewer component into existing projects and Reference Manager simplifies adding PDF Viewer SDK assemblies to WinForms and WPF projects, supporting GAC, installed locations, and NuGet sources.
The .NET MAUI PDF Viewer Toolbox enables drag-and-drop integration of PDF Viewer SDK component into XAML files, automatically adding required namespaces and NuGet packages.

Syncfusion DOCX Editor SDK Extension

Features

Syncfusion has introduced DOCX Editor SDK Extension for Visual Studio which helps to build Blazor and WPF applications to create, edit, and write DOCX files without external dependencies.
Includes ready-to-use project templates and a Blazor DOCX Editor SDK code generator to insert DOCX Editor component directly into Razor files.
Includes WPF DOCX Editor SDK item templates to WPF projects, and adds DOCX Editor SDK references easily through the reference manager.

Syncfusion Spreadsheet Editor SDK Extension

Features

Syncfusion has introduced Spreadsheet Editor SDK Extension which helps to create Syncfusion application based on the platform selection such as Blazor, WPF and Windows Forms using Syncfusion Spreadsheet Editor SDK component.
The Blazor Spreadsheet Editor SDK Code Generator inserts component code into Razor files, auto-configuring namespaces, styles, and NuGet references.
Enhance existing WinForms or WPF projects by injecting Spreadsheet Editor SDK component through intuitive item templates and Reference Manager options.

Test Results

Component Name	Platform	Test Cases	Passed	Remarks
Calculate	Windows Forms	138	138	All Passed
Calculate	WPF	9	9	All Passed
DOCX Editor(Document Editor)	Blazor	1944	1944	All Passed
DOCX Editor(Document Editor)	Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC)	5023	5023	All Passed
Excel Library	.NET	37836	37836	All Passed
Metafile Renderer	.NET	863	863	All Passed
PDF Library	.NET	13703	13703	All Passed
Pdf Viewer	Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC)	19374	19374	All Passed
PDF Viewer	.NETMAUI	14684	14684	All Passed
PdfViewer	WPF	2998	2998	All Passed
PdfViewer	Windows Forms	207	207	All Passed
PowerPoint Library	.NET	54476	54476	All Passed
SfPdfViewer2	Blazor	14134	14134	All Passed
SfSpreadsheet	WPF	2699	2699	All Passed
Spreadsheet	Blazor	2780	2780	All Passed
Spreadsheet	Web(Javascript, Angular, React, Vue, ASP.NET Core & MVC)	10411	10411	All Passed
Word Library	.NET	40087	40087	All Passed
Word Library	Java	4079	4079	All Passed