Changelog

Release Notes

Stay up to date with the latest features, improvements, and bug fixes.

26.1.0Latest

January 29, 2026

Excel Viewer

  • Enhancement: Improved highlighted text positioning for vertically oriented cell content, ensuring accurate alignment and visual consistency.

Excel Converter

  • Bug: Fixed an issue where line spacing between text became compressed when converting Excel files to PDF.

PDF Viewer

  • Bug: Fixed an issue where text appeared in different positions on tiles with identical dimensions, ensuring consistent layout and accurate text placement.

PDF Converter

  • Bug: Fixed an issue where annotated text became transparent and invisible when converting PDF files to HTML.
  • Bug: Resolved a problem where header text was missing during PDF-to-HTML conversion.

PSD Viewer

  • Bug: Fixed incorrect blending of transparent pixels for certain blending modes, ensuring accurate layer composition and visual rendering.

Project Viewer

  • Bug: Fixed incorrect behavior when rendering Microsoft Project files that use formula-calculated extended attributes.

Visio Viewer

  • Bug: Fixed an issue where an embedded object could disappear from the diagram during rendering.

Word Viewer

  • Enhancement: Improved EQ field rendering by enhancing displacement handling and updating layout logic for more precise positioning and bounding.
  • Bug: Fixed an issue where text was rendered with corrupted or invalid characters in certain Word documents.

Features

  • Word Viewer Culture Support: Added support for explicitly defining the document culture when viewing DOC and DOCX files. This ensures that localized content—such as dates—renders exactly as it does in Microsoft Word (e.g., Hebrew dates).

    Configuration example:
    var config = new WordConfig { DocumentCulture = "he-IL" };

25.12.0

December 31, 2025

Excel Viewer

  • Fixed issues with shape rendering and formatting in XLSX files, ensuring correct layout.
  • Resolved misalignment problems affecting shapes when viewing XLS and XLSX documents.
  • Fixed an issue where Excel chart data labels were incorrectly repositioned, causing text alignment shifts during file viewing.

Email Converter

  • Fixed a FormatException that occurred when decoding malformed Base64 subject headers containing misplaced periods in encoded words, ensuring more robust email rendering.

Image Viewer

  • Improved JPEG2000 decoding performance to speed up image processing and rendering.
  • Fixed an issue during CDR rasterization where German umlaut characters were lost or not recognized correctly.

PDF Viewer

  • Fixed an issue where the background layout appeared scrambled in the rendered output.
  • Resolved a problem where the PDF Viewer could enter an infinite loop when processing certain tables and images.

PDF Converter

  • Fixed an issue where converting PDF files to images resulted in images with an incorrect black background.

Word Viewer

  • Fixed an issue where math equation shapes were rendered improperly.

Word Converter

  • Fixed an issue where equations were not rendered correctly during DOCX to PDF conversion.
  • Resolved a problem where content controls appeared in grey font color when converting DOCX files to PDF.

Visio Viewer

  • Fixed an issue where some shapes were missing when viewing VSDX files.
  • Resolved a System.NullReferenceException that occurred when opening Visio files containing hyperlinks.

25.11.0

November 28, 2025

Excel Viewer

  • Fixed a histogram value calculation error that occurred when exporting Excel files to PDF.
  • Resolved an issue where leader lines, chart axes, and shadow effects were missing during sheet-to-image rendering.

Image Viewer

  • Optimized JPEG2000 processing to significantly improve decoding speed and overall rendering performance.

Email Converter

  • Fixed an issue occurring during PDF-to-MSG conversion where a null value in the content-type named property caused the process to fail.

PDF Viewer & Converter

  • Improved performance in PDF-to-Image conversion, significantly reducing processing time.
  • Fixed an issue where certain languages were rendered incorrectly when converting EPUB files.
  • Resolved a highlight opacity issue during PDF-to-DOCX conversion.

Word Viewer

  • Implemented native rendering support for PDF radial gradients within Word documents.
  • Improved the handling and rendering of gradient brushes in Word files.

Features

  • Excel Printing Configuration: New properties PrintGridlines and PrintHeadings added.

25.10.0

October 31, 2025

New Product Launch

  • Doconut Converter Plugin: A new module for document conversion (PDF, DWG, PNG, JPG, MSG, EML, PPTX, XLSX, DOCX).

Excel Viewer

  • Optimized performance issues with pattern rendering.
  • Fixed green line appearing when rendering certain Excel files.

PDF Viewer

  • Improved PDF viewing performance for large and complex documents.
  • Fixed replacing text issue with large strings.
  • Fixed table rendering issue where page breaks were not created properly.

Word Viewer

  • Fixed content overlap in document header.
  • Fixed incorrect position of images in document headers.

25.9.0

September 30, 2025

Excel Viewer

  • Added support for applying user-defined print areas.
  • Resolved an issue where shapes in XLSX format were not rendered correctly.

Email Viewer

  • Resolved an issue where the Sent Date appeared twice when viewing MSG files.

PDF Viewer

  • Resolved an issue where some PDF files produced incorrect image rendering.
  • Corrected text formatting issues and scaling problems with embedded pictures.

Word Viewer

  • Resolved an issue where Chinese text became invisible.
  • Corrected spacing inconsistencies between parentheses and colons.
  • Addressed rendering issues where chart labels and plot areas were displayed incorrectly.

General

  • Improved handling of client IP normalization in .NET Framework for security.txt.

25.8.0

August 29, 2025

Excel Viewer

  • Resolved an issue where textboxes did not auto-adjust their width.
  • Corrected a rendering problem where chart labels were displayed incorrectly.

Email Viewer

  • Fixed a security issue in the version targeting .NET Framework 4.8.

Image Viewer

  • Optimized memory and CPU usage for PNG images.
  • Resolved an infinite loop issue encountered when processing JPEG2000 files.

PDF Viewer

  • Reduced page optimization time.
  • Improved memory efficiency during the processing of large volumes of text data.

Word Viewer

  • Corrected an issue where Chinese text was distributed improperly.

Visio Viewer

  • Optimized memory usage during rendering.
  • Resolved an issue where some shapes were stretched during rendering.

General

  • Addressed an issue where conversions running inside a background Task would fail.

25.7.0

July 31, 2025

Image Viewer

  • Added support for EMF, AVIF, and DJVU image formats.
  • Enhanced performance and resolved stability issues in DNG image viewer.
  • Resolved an error where CMX images could not be opened.

Project Viewer

  • Added support for rendering Title Horizontal and Title Vertical gridlines in Gantt charts.
  • Corrected an issue where certain MPP files containing a VBA project could not be read.

Visio Viewer

  • Resolved an issue where lines were incorrectly connected.
  • Corrected text alignment inside shapes.

General

  • Resolved an issue in ExportMetadata method where security.txt was not populated correctly.
  • Updated image processing engine in .NET 6 version for .NET 9 compatibility.

25.6.0

June 30, 2025

Word Viewer

  • Updated SkiaSharp to 3.119.0.
  • Corrected table width rendering inside text boxes and shapes.
  • Fixed page numbers in INDEX section.
  • Fixed table column widths in RTF documents.
  • Resolved missing images after rendering.

Excel Viewer

  • Fixed chart contents shifting.
  • Fixed arrow graphics size and position.
  • Fixed chart label positioning.

Email Viewer

  • Enhanced rendering quality for inline images in EML and MSG files.
  • Fixed embedded images extraction issue.

Image Viewer

  • Improved PNG compression level.
  • Resolved CMX and CDR image format opening issues.

25.5.0

May 30, 2025

Excel Viewer

  • Fixed negative number formatting.
  • Fixed legend text orientation.

Email Viewer

  • Optimized rendering performance.

Image Viewer

  • Enhanced TIFF viewing performance.
  • Improved color export quality and performance for TIFF images with ICC profiles.

PDF Viewer

  • Fixed green-tinted background issue.

Project Viewer

  • Fixed Gantt chart timescale label rendering.

PSD Viewer

  • Enhanced drop shadow rendering.

Visio Viewer

  • Fixed bold text sizing.
  • Fixed content cutoff issue.

25.4.0

April 29, 2025

Excel Viewer

  • Fixed text box collapse issue.
  • Addressed performance degradation.

Visio Viewer

  • Fixed extra white space in grouped shapes.
  • Resolved incorrect rendering of hyphens and slashes.

Email Viewer

  • Fixed lost spaces in EML viewer.

PDF Viewer

  • Fixed Japanese text formatting.
  • Resolved SVG rendering issue.

Project Viewer

  • Fixed timescale rendering issues.
  • Corrected start and finish dates for timephased data.

25.3.0

March 28, 2025

Features

  • Email Encoding property added.
  • Subject & Body Encoding properties added.

Enhancements

  • Improved PDF performance and memory consumption.
  • Improved email character encoding handling.

Bug Fixes

  • Resolved blacked out PDF document issue.

25.2.0

February 28, 2025

Enhancements

  • CAD Viewer: Added MTEXT support, fixed DWF visibility, improvements for .NET Core.
  • Excel Viewer: Added Rich Text support, resolved chart alignment.
  • Email Viewer: Fixed EML date shift issue.
  • Image Viewer: Fixed blank TIFF output, optimized SVG memory, resolved CDR rendering bugs.
  • PDF Viewer: Enhanced image compression, improved table rendering, fixed Chinese character rendering.

Bug Fixes

  • Resolved Word file loading issue due to custom fonts.

Important

  • Update System.Text.Json to 8.0.5.

25.1.0

January 31, 2025

Features

  • Resolved issues in ExportToPng and ExportMetadata methods.

Enhancements

  • Excel Viewer: Added AutoShapes support for ODS, fixed chart background colors.
  • Email Viewer: Resolved MSG file display issue.
  • Image Viewer: Improved CDR stability, enhanced TIFF frame loading.
  • PSD Viewer: Corrected PSD shape layer handling, fixed rendering for older Photoshop versions.
  • Visio Viewer: Fixed VSDX background and text corruption.

24.12.1

December 30, 2024

Features

  • FontFolders property added to WordConfig.

Enhancements

  • Excel Viewer: Font/Cell Color in Data Sorter, Center alignment support.
  • Email Viewer: Fixed TO field parsing in EML.
  • PowerPoint Viewer: Precise text placement, restored text shadows.
  • Project Viewer: Fixed Timescale rendering.
  • PSD Viewer: Correct handling of Shape layers.
  • Visio Viewer: Improved Arabic language support.

24.10.0

October 30, 2024

Features

  • Embedded JavaScript and CSS Resources in Doconut DLLs.

Enhancements

  • Resources Folder added to Samples.
  • CAD Viewer: Line styles support, optimized CadHatch.
  • Excel Viewer: Limit/grouped equations support.
  • Email Viewer: SMIME support.
  • Image Viewer: Enhanced TIFF memory management.
  • PSD Viewer: Optimized Gradient Effects.
  • PowerPoint Viewer: Improved chart rendering.
  • Project Viewer: Task bar shapes support.
  • Word Viewer: Color control for shading, improved background rendering.

Bug Fixes

  • Visio Viewer: Fixed rogue line issue.

24.9.0

September 30, 2024

Enhancements

  • Embedded libraries for .NET Standard/Core and .NET 6.
  • Performance fixes in PDF and Word.
  • Added AutoFitAllTables property in Word configuration.
  • Added GetThumbnailDimensions method.

Bug Fixes

  • Resolved image annotations issue.

24.8.0

August 20, 2024

Enhancements

  • Search and copy functionalities in Word, Excel, PowerPoint.
  • New ExportFileToPdf function.
  • SplitSegments option in PDF configuration.
  • Added Doconut.Plugins.dll.
  • Custom error log path in Doconut.Clouds.dll.

Bug Fixes

  • Resolved image attachment overflow in emails.
  • Resolved Ionic.Zip.dll issue.

24.7.0

July 15, 2024

Enhancements

  • Added TimeZoneOffset in EmailConfig.
  • New Configurations: PsdConfig, TxtConfig, TiffConfig.
  • CAD Viewer: DGN rendering, optimized loading.
  • Excel Viewer: Image recoloring, color adjustments.
  • Email Viewer: New rendering option.
  • Image Viewer: SVG detection fix, EPS rendering resolution.
  • MHT Viewer: New render support.
  • PDF Viewer: Multi-layer PDF fix.
  • PSD Viewer: Performance enhancements.
  • PowerPoint Viewer: Font/hyperlink fixes.
  • Project Viewer: Multi-page generation fix.
  • Word Viewer: Additional render optimization.
  • Visio Viewer: Extended rendering capability.
  • XPS Viewer: New render support.

Fixes

  • Fixed multiple page display issue.
  • Fixed CallContext exception.

24.6.0

June 17, 2024

Enhancements

  • CAD Viewer: Optimized loading, enhanced export, improved DXF text.
  • Email Viewer: Accurate date handling, enhanced EMLX support.
  • EPUB Viewer: Enhanced performance, refined paragraph processing.
  • Excel Viewer: Seamless cell merging, embedded images, text direction.
  • MHT Viewer: Performance optimizations, image rendering.
  • PowerPoint Viewer: Accurate chart rendering, optimized memory, reliable hyperlinks.
  • Project Viewer: Precise unit display, portrait view option.

Fixes

  • Improved focus handling in iframe.
  • Fixed printing crop issue.

24.5.3

May 31, 2024

General

  • Custom Fonts Support for PowerPoint.
  • Doconut License Integration via XML/Stream.
  • Memory Usage Optimization.
  • Improved PDF viewer performance.
  • Boosted CAD viewer performance.
  • Fixed TIFF viewing issue.
  • Resolved DWG file error.

24.4.0

April 15, 2024

General

  • CAD/DGN engine improvements.
  • Excel engine optimization.
  • PowerPoint engine optimization.
  • PSD engine optimization.
  • Fixed watermark issues.
  • Fixed PowerPoint opening errors.

24.3.2

March 25, 2024

General

  • Doconut .NET 6 released.
  • Added to Nuget repository.
  • Optimized PDF loading.
  • Upgraded Word processing.
  • Enhanced Visio viewer.
  • Image memory optimization.
  • Custom cultures support.
  • Flexible licensing.
  • Fixed PDF checkbox issue.
  • Fixed custom watermark strings.
  • Important: Update Newtonsoft.Json and System.Text.Encoding.CodePages.

1.0.5.2

February 14, 2024

General

  • Improved PDF performance.
  • Upgraded Word viewer.
  • Enhanced Visio viewer.
  • Addressed Project viewer performance.
  • Improved email engine.
  • Fixed DWG display.
  • Fixed PDF hyperlink issue.

1.0.5.1

January 05, 2024

General

  • Visio compatibility improvements.
  • New AWS/Azure samples.
  • Fixed stamp annotation resizing.
  • Fixed annotation export duplication.
  • Fixed DWG blurry rendering.
  • Fixed Excel header positioning.

1.0.5.0

October 25, 2023

General

  • Updated Word engine.
  • Fixed Arabic Word docs issues.
  • Updated PDF engine for Arabic fonts.
  • Resolved PDF generation bug.
  • Optimized Email Engine.
  • Improved PSD engine.
  • Important: SkiaSharp and System updates.

1.0.4.2

January 15, 2022

General

  • Update ExportAnnotationToPdf name changed.
  • Update ExportToPdf parameters.
  • New ExportToPdf with filePath overload.
  • Speed improvements in annotation pdf export.
  • New FixInvalidImages option.
  • New ExportToPdfImage method.
  • New ExportAnnotationsToPdf native option.
  • New ExcelConfig options.
  • New Config option CachePages.
  • New samples and functions.

1.0.4.1

August 01, 2022

General

  • New Watermark RGB color support.
  • New Session restriction feature.
  • New IP restriction feature.
  • New DoconutOptions.
  • New perPageThread parameter.
  • New grayScale parameter.
  • New ExcelConfig options.
  • Update InitCache.
  • Update ExportPdfA and ConvertPdf defaults.
  • Fix touch support.
  • Improvements in rendering.

1.0.4.0

April 02, 2022

General

  • New .Net 6 compatible.
  • New Angular sample.
  • New ExportToPdfWatermark method.
  • New Annotation code behind API.
  • New GetPdfBookmarks method.
  • New custom license path.
  • New SetWatermark overload.
  • Improvements in rendering.

1.0.3.9

Feb 01, 2022

General

  • Update: .NET framework min version 4.7.
  • Update: IncludeJqueryUI default false.
  • New Cloud support.
  • New ExportToCloud/UploadToCloud methods.
  • New InitCache method.
  • New LargeDocument sample.
  • New SplitToPdf and MergeFromPdf methods.
  • New client side events.
  • Fixes for Slides, BouncyCastle, Pdf links, AutoLoad, Search result div, Zoom.

1.0.3.8

Sep 01, 2021

General

  • New Search without OCR/SRH.
  • New AllowSearch option.
  • New CopyMode option.
  • New AllowCopy option.
  • New SaveSearch method.
  • New Pdf links available.
  • New ConvertPdf option.
  • New FileFormat API.
  • Fixes for Excel, Document links, Search div, Focus, Tif files.

1.0.3.7

May 25, 2021

General

  • Blazor/Razor pages samples added.
  • New Sample solutions.
  • .NET Core CSS updates.
  • Improvements in CAD viewer.
  • New TifConfig.
  • New SetWatermark method.
  • New CloseDocument method.
  • New ExportAnnotationsToPng method.
  • New ExportToPng overload.
  • New WebFarm settings.
  • New Search support in WebFarm.
  • New Note annotation features.
  • New WordConfig option.
  • Fixes for Note annotation, Pdf DefaultRender, Console JS errors, Annotation save.

1.0.3.6

Feb 15, 2021

General

  • New GetRotateInfo method.
  • New DefaultRender option in PdfConfig.
  • New Flip feature.
  • New EmailCofig SkipExternalImages.
  • New ExcelConfig options.
  • Update in WordConfig and EmailConfig.
  • Update in ExportToPng.
  • Fixes for Freehand annotation, FitWidth/Height, CSS padding, Tooltip, Excel formula, Pdf links.

1.0.3.5

Nov 01, 2020

General

  • OpenDocument Uri overload update.
  • Webfarm support for annotation.
  • jQuery 3.5.1 default.
  • jQuery UI upgrade.
  • HideThumbs bug fix.
  • Culture option in excel config.
  • Annotation improvements.

1.0.3.4

July 20, 2020

General

  • Viewing enhancements.
  • Improvements in Diskimage handler.
  • New Webfarm support.
  • DWG, MPP & VSD native support in .NET core.
  • New OpenDocumentService.
  • New ImageConfig options.
  • New HyperlinksPageCount.
  • New ImageResolution.
  • New DefaultRender for CAD.
  • New 3D support in CAD.
  • New ExportAnnotationToPdf method.
  • Fix rotation bug.

1.0.3.3

Jan 08, 2020

General

  • Fix for large Project / MPP files.
  • Fix for Word files with ConvertPdf.
  • New PdfMargins in DWG.

1.0.3.2

Aug 15, 2019

General

  • New FixedZoom properties.
  • New clickable links in docs.
  • New Search MVC sample.
  • Fix excel viewing.
  • Fix watermark font.
  • Fix text annotation border.

1.0.3.1

July 01, 2019

General

  • Watermark corner support.
  • New web.config setting.
  • Fix page reload bug.
  • New ExcelConfig options.

1.0.3.0

May 01, 2019

General

  • Moving after rotation bug fixed.
  • Added watermark support for DiskHandler.
  • Fix zoom and fittype bug.
  • New ImageConfig.
  • New Refit() call.
  • New MSG/EML as HTML option.
  • New samples.

1.0.2.9

February 20, 2019

General

  • Added support for .NET core / standard.
  • Added PDF-A support.
  • Fixed empty excel error.
  • New modern UI sample.

1.0.2.8

September 15, 2018

General

  • Improved Excel export.
  • Search supports multiple words.
  • Fix for jQuery 3.0+ scroll.
  • Added touch zoom.

1.0.2.7

July 15, 2018

General

  • Improved AutoCAD support.
  • Improved Html rendering.
  • Support for latest jQuery.
  • Better PDF export.

1.0.2.6

April 15, 2018

General

  • Improved AutoCAD support.
  • Html plugin Windows 2016 support.

1.0.2.5

December 06, 2017

General

  • Added OnPageClicked event.
  • New DocumentConfig options.
  • New GetDocumentFormat method.
  • Support for AutoCAD 2018.
  • Removed Submit Query text.

1.0.2.4

August 24, 2017

General

  • Support for MVC Razor.
  • New DCN server project.
  • Fixed Annotation border size.

1.0.2.3

March 01, 2017

General

  • Improvements in CAD format, DXF support.
  • Added custom configurations support.
  • Threading added to DiskImageHandler.
  • Fixed bugs in text annotation.

1.0.2.2

October 01, 2016

General

  • Improvements in CAD format.
  • New LargeDoc property.

1.0.2.1

March 01, 2016

General

  • Added support for MHT.
  • Improvements in Tiff viewing.
  • SafeLoad option in Excel.
  • New ExportToPdf overload.
  • Freehand annotation bugs fixed.

1.0.2.0

September 10, 2015

General

  • Fixed Annotation plug-in load issue.
  • Fixed Annotation Ajax saving issue.

1.0.1.9

March 31, 2015

General

  • Support for client side JavaScript events.
  • Stamp annotation control improved.
  • Mobile support added.
  • ShowAnnotations function update.
  • New property MaxZoom.
  • New javascript function VisiblePages().
  • Bug fixed when annotating multiple documents.

1.0.1.8

October 15, 2014

General

  • Annotation creation improved.
  • Arrow annotation rendering improved.
  • Annotation sample page enhanced.
  • Thumbnails show annotations.
  • Support for CSV added.
  • New WatermarkInfo and AutoClose property.
  • New sample pages.
  • jQuery updated.

1.0.1.7

July 31, 2014

General

  • New properties AutoLoadPages and CacheEnabled.
  • Support for OpenOffice formats.
  • New function to hide pages.
  • Asp.Net print landscape support.
  • SVG and EPUB discontinued.
  • Password sample page added.
  • User Control sample page added.
  • New help pdf file.

1.0.1.6

May 15, 2014

General

  • New properties for tooltip and zoom.
  • New Mobile, Update Panel samples.
  • Bug in HTML and MPP fixed.
  • Support for EPUB & SVG discontinued.

1.0.1.5

February 20, 2014

General

  • New function for exporting documents to PDF.
  • New Office Ribbon sample.
  • Bug in Word and Dicom fixed.
  • New Support for EPUB & SVG formats.

1.0.1.4

December 25, 2013

General

  • Smooth text annotations and new image annotation type.
  • Note annotation non ASCII support.
  • New property IncludeJQueryUI.
  • New property BasePath.
  • New JavaScript property IsLoaded.
  • Fix for Excel, PowerPoint and CAD formats.

1.0.1.3

June 01, 2013

General

  • Added search function.
  • Better support for XLS files.

1.0.1.2

March 29, 2013

General

  • New property FitType.
  • Change FitType from javascript api.
  • Support added for TXT files.
  • Print Silverlight window icons.
  • Fixed bug for MSG files.

1.0.1.1

March 15, 2013

General

  • You can now save documents to a common .DCN format.

1.0.1.0

Feb 20, 2013

General

  • Added print support which requires silverlight.
  • Added annotation support.