PDFBundle4NET (PDFView4NET WinForms Edition + PDF4NET) Releases

Learn what's new across releases, with details of features, enhancements, and resolved issues.

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PDF4NET 16.3.2Aug 1, 2026
Features
  • PDF4NET.View
    • Performance improvements.
Fixes
  • PDF4NET
    • Some PDFPageSize predefined values are not correct.
    • Merged PDF file is displayed incorrectly after the fonts are merged.
    • Documents with page transparency groups cannot be loaded in partial mode.
    • Invisible signatures (zero size) have an appearance object.
  • PDF4NET.Render
    • Page with invalid indexed colorspace cannot be rendered.
PDFView4NET Windows Forms Edition V11.3.33Aug 1, 2026
Fixes
  • PDF Rendering:
    • Some pages with content stream errors cannot be displayed.
  • PDF Viewer:
    • Some pages with content stream errors cannot be displayed.
PDF4NET 16.3.1Jul 1, 2026
Features
  • PDF4NET
    • Move pages within the document.
  • PDF4NET.View
    • Reorder pages using drag & drop in PDFThumbnailsView control.
Fixes
  • PDF4NET
    • Some 1bpp images are not redacted correctly.
  • PDF4NET.Render
    • Text is not rendered correctly in some situations.
PDFView4NET Windows Forms Edition V11.3.32Jul 1, 2026
Fixes
  • PDF Rendering:
    • Text is not rendered correctly in some situations.
  • PDF Viewer:
    • Text is not rendered correctly in some situations.
PDF4NET 16.3.0Jun 1, 2026
Features
  • PDF4NET
    • New public Bitmap ConvertPageToBitmap(PDFRendererSettings settings) method.
  • PDF4NET.View
    • Added PDF page thumbnails viewer control.
Fixes
  • PDF4NET
    • Text with bold & italic font is not wrapped correctly in some cases.
    • PDFFile.ExtractPage hangs indefinitely for some invalid PDF files.
    • New page cannot be added to some invalid PDF files.
    • RGB/CMYK/Gray page transforms drop the /Mask for converted images.
    • Text is clipped incorrectly in composite cells is some situations when MaxHeight has been set for a row.
    • Incremental updates invalidate previous signatures for some PDF files.
    • PDF files with empty (0 entries) xref section cannot be loaded.
    • Content cannot be extracted from PDF files with circular references in form XObject content.
    • Files merged with PDFMerger do not display their attachments in Adobe Acrobat if their number is less than 32.
    • Image cannot be decoded if it references a recursive ICC colorspace.
    • Image cannot be decoded if it references a recursive indexed colorspace.
    • Image cannot be decoded if it references a recursive separation colorspace.
  • PDF4NET.Render
    • Page cannot be rendered when it contains circular references in form XObject content.
PDFView4NET Windows Forms Edition V11.3.31Jun 1, 2026
Fixes
  • PDF Rendering:
    • PDF files with empty (0 entries) xref section cannot be loaded.
    • Page cannot be rendered when it contains circular references in form XObject content.
  • PDF Viewer:
    • PDF files with empty (0 entries) xref section cannot be loaded.
    • Page cannot be displayed when it contains circular references in form XObject content.
PDFBundle4NET - includes PDFView4NET Windows Forms Edition V11.3.30May 1, 2026
Fixes
  • PDF Rendering:
    • Page with damaged LZW encoded image is not rendered correctly.
    • Some pages with JPEG2000 images cannot be rendered.
  • PDF Viewer:
    • Page with damaged LZW encoded image is not rendered correctly.
    • Some pages with JPEG2000 images cannot be rendered.
    • PDFPageView blocks indefinitely in some situations when changing the work mode.
PDFBundle4NET - includes PDF4NET 16.2.2May 1, 2026
Features
  • PDF4NET
    • Duplicate redacted images.
    • PDFFlowTableContent.MaxRowHeight and PDFFlowTableRow.MaxHeight properties to limit the maximum height of a row.
Fixes
  • PDF4NET
    • AppendFile method hangs indefinitely for some input files with invalid fields.
    • Text cannot be extracted if it is stroked with a pattern color and filled with a non-pattern color.
    • Tiff images with multiple alpha channels are not handled correctly.
    • DataMatrix actual data encoding is not selected correctly in some cases, when DataEncoding is set to Auto.
    • Some documents with invalid fields cannot be loaded.
    • Some text glyphs are not extracted correctly.
    • Hidden text is extracted with additional spaces.
  • PDF4NET.Render
    • Page with damaged LZW encoded image is not rendered correctly.
    • Some pages with JPEG2000 images cannot be rendered.
  • PDF4NET.View
    • PDFDocumentView cannot display PDF file with invalid fields.
    • PDFDocumentView hangs in some situations when an exception is raised during page parsing.
PDFBundle4NET - includes PDFView4NET Windows Forms Edition V11.3.29Apr 1, 2026
Features
  • PDF Rendering and Viewer:
    • Rendering improvements.
Fixes
  • PDF Viewer:
    • Highlight annotations cannot be serialized.
PDFBundle4NET - includes PDF4NET V16.2.1Apr 1, 2026
Features
  • PDF4NET
    • Create PDFRawImage objects from COS image streams.
    • Added PDFDocumentFileAttachment.GetPayloadStream method for efficient access to large attachments.
  • PDF4NET.View
    • WinForms - You can now select annotations outside page area.
Fixes
  • PDF4NET
    • StructureTree cannot be loaded for some PDF files.
  • PDF4NET.View
    • Loading a PDF file in incremental mode in PDFDocumentView throws an IO exception.
    • PDFDocumentView hangs on document load when running on .NET 10.
    • WinForms - PDFDocumentView.ContentPainted event allows user to draw over the loading indicator area.
    • WinForms The PDFDocumentView page number indicator is not displayed correctly on High-Dpi screens.
    • WPF - Annotation group selection does not work correctly when PDFDocumentView.RestrictAnnotationsToVisiblePageArea is false.
PDFBundle4NET - includes PDF4NET V16.2.0Mar 4, 2026
Features
  • PDF4NET
    • Added support for PDFFowTableContent horizontal align.
  • PDF4NET.View
    • Added annotation tooltips.
    • Added show/hide annotations.
    • Added show/hide form fields.
    • Added show/hide the page number indicator (bottom left corner).
Fixes
  • PDF4NET
    • Fixed some 1bpp images which were not redacted correctly.
  • PDF4NET.View
    • PDFDocumentView crashes when an annotation is added in PageRenderingCompleted event.
    • Some documents were displayed incorrectly because of caching across documents.
PDFBundle4NET - includes PDFView4NET Windows Forms Edition V11.3.28Mar 4, 2026
Features
  • PDF Rendering:
    • Rendering improvements.
  • PDF Viewer:
    • Rendering improvements.
    • Free text annotations are now included in the PDFAnnotationsView control.
PDFBundle4NET - includes PDF4NET V16.1.2Feb 1, 2026
Features

PDF4NET

  • Added support for page transparency group.
  • PDF/A-1 validation now checks the presence of page transparency group.

PDF4NET.View

  • Memory usage improvements.
Fixes

PDF4NET

  • Colorspaces are not extracted from PDF file.
  • Some existing PDF files are resaved incorrectly.

PDF4NET.Render

  • Some text is not displayed because the backing TrueType font is invalid.
  • Page with invalid font cannot be rendered, throws stack overflow exception.
  • Text is not rendered correctly, characters are scrambled.
PDFBundle4NET - includes PDFView4NET Windows Forms Edition V11.3.27Feb 1, 2026
Fixes

PDF Rendering:

  • Some text is not displayed because clip paths spread across q/Q boundaries.

PDF Viewer:

  • Some text is not displayed because clip paths spread across q/Q boundaries.
PDFBundle4NET - includes PDFView4NET Windows Forms Edition V11.3.26Jan 5, 2026
Fixes

PDF Rendering

  • Damaged file could not be loaded.
  • Thin lines were rendered very faint at high resolution.

PDF Viewer

  • Damaged file could not be loaded.
  • Thin lines were rendered very faint at high resolution.
PDFBundle4NET - includes PDF4NET V16.1.1Jan 5, 2026
Features

PDF4NET

  • PDFTextExtractionOptions has been renamed PDFTextExtractionContext.
  • PDFContentExtractionContext.TextExtractionOptions has been renamed PDFContentExtractionContext.TextExtractionContext.
Fixes

PDF4NET

  • Field border definition is generated even if it is not stroked.
  • An exception is thrown when a multiline textbox field does not have a size and a color is set on it.
  • Some existing PDF files are resaved incorrectly.
  • Some incremental updates are not performed correctly.

PDF4NET.Render

  • Thin lines are rendered very faint at high resolution.

PDF4NET.View

  • PDFDocumentView hangs if the page content has errors.