Learn what's new across releases, with details of features, enhancements, and resolved issues.
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:
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:
- PDF Viewer:
- Rendering improvements.
- Free text annotations are now included in the PDFAnnotationsView control.
PDFBundle4NET - includes PDF4NET V16.1.2Feb 1, 2026
FeaturesPDF4NET
- Added support for page transparency group.
- PDF/A-1 validation now checks the presence of page transparency group.
PDF4NET.View
- Memory usage improvements.
FixesPDF4NET
- 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
FixesPDF 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
FixesPDF 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
FeaturesPDF4NET
- PDFTextExtractionOptions has been renamed PDFTextExtractionContext.
- PDFContentExtractionContext.TextExtractionOptions has been renamed PDFContentExtractionContext.TextExtractionContext.
FixesPDF4NET
- 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.