Released: May 6, 2026

Updates in V26.5

Features

• Added support for importing Excel cell ranges as native PowerPoint tables via ExcelWorkbookImporter.
• Implemented transition behavior between slides with animation in HTML5.

Fixes

• Cannot open a presentation after PPT to PPTX conversion.
• Stack overflow when converting a slide to an image.
• Alright Sans fonts are displayed incorrectly when converting PPTX to PDF.
• Latest versions are slower during PPTX-to-HTML5 conversions.
• X-axis title is cut when converting a chart to an image.
• Text...

Released: Apr 6, 2026

Updates in V26.4

Fixes

• Embedded Japanese fonts are rendered as garbled text when converting slides to images.
• Slide layout 'ColorMapOverride' is not applied to master slide shapes when rendering.
• Dashed lines on a chart are displayed incorrectly when converting PPTX to PDF.
• 'PptxReadException' occurs when loading a PPTX file.
• Vertical text incorrectly rotated when converting PPTX to PDF.
• PowerPoint to PDF/UA-1: Table header options (Header Row / First Column) not mapped correctly.
• Accessing 'IChartSeries.Name...

Released: Mar 6, 2026

Updates in V26.3

Features

• Added support for opening text disguised as .ppt/.pps as text-imported presentations.

Fixes

• PowerPoint to PDF/UA - Existing alt texts not transferred for multiple element types.
• Extra paragraphs for animated text causing rendering artifacts.
• PowerPoint to PDF/UA - Automatically generated alt texts for tables, formulas, and images.
• PowerPoint to PDF - Font shadow and reflection rendered incorrectly.
• EMF image is displayed incorrectly when converting a slide to JPG.
• "No Image" is added...

Released: Feb 6, 2026

Updates in V26.2

Fixes

• An SVG image is missing when converting a slide to PNG.
• PowerPoint to PDF/UA - Empty H2 tag on last slide (no content, no reference).
• Exception "Unable to cast object of type 'e' to type 'System.Int32'" when creating Presentation from the PowerPoint file.
• SVG image is displayed incorrectly when converting PPTX to PDF.
• PowerPoint to PDF/UA - Formula path element has incorrect position and invalid BBox.

Released: Jan 13, 2026

Updates in V26.1

Features

• Added support for sensitivity labels.
• Restored access to graphics path information from ShapeElement.

Fixes

• Ink objects are displayed incorrectly when converting PPTX to PDF.
• Graphics object is shifted when converting PPTX to PDF.
• A shape's hyperlink is missing when converting PPTX to HTML.
• Images are distorted when converting PPTX to PDF.
• Text shadow is displayed incorrectly when converting PPTX to PDF.
• Aspose.Slides 23.11 - Image rendering issue when saving a particular PPTX to HTML...

Released: Dec 5, 2025

Updates in V25.12

Features

• Added support for managing Guides on masters and slide layouts.

Fixes

• Opening and saving a PPT file throws a NullReferenceException.
• Converting ODP to HTML produces an empty document.
• Image is slightly shifted when converting a slide to an image.
• PPTX to PDF: Incorrect pie chart color in output.
• Saving presentations with HtmlOptions.PicturesCompression produces unexpected results.
• Combo chart displays differently when converting PPTX to PDF.
• Combo chart missing when converting PPTX to...

Released: Nov 13, 2025

Updates in V25.11

Features

• Implemented the ability to assign custom image-saving handlers.
• Added support for retrieving font substitutions per slide.

Fixes

• ArgumentException error occurs when saving a presentation.
• NullReferenceException is thrown when calling Portion.GetRect.
• Failure to initialize presentation due to mathematical equations on slides.
• Force a fixed AutoShape height with text Autofit enabled.
• Text becomes bold when converting to PNG.
• Inaccuracies in animated text paragraph extraction and image...

Released: Oct 6, 2025

Updates in V25.10

Features

• Improved export of metafiles to PDF.

Fixes

• Characters are missing when converting PPTX to HTML.
• List bullets are changed when converting PPT to PDF.
• Converting PPT with EMF images to PDF adds borders to an image.
• Gray artifacts appear and circle edges are not smooth when converting PPTX to PDF.
• Returning an invalid value from the same cell in chart's workbook.
• Math formula is tagged as an artifact when converting PPT to PDF/UA.
• ActualMajorUnit property of a vertical chart axis always...

Released: Sep 3, 2025

Updates in V25.9

Features

• Improved import of extended Excel charts.

Fixes

• Drawn shapes and charts are incorrectly tagged as artifacts in the output PDF.
• Slide master content cropping when converting PPTX to PDF.
• PPTX to JPG: Output file is not rendered correctly.
• PPTX to PDF: EMF not rendered correctly in Linux.
• NullReferenceException occurs when saving a presentation to PPTX.
• Missing X, Y, Width, and Height values for chart elements.
• PptxReadException is thrown when loading a PPTX file.
• NullReferenceException...

Released: Aug 5, 2025

Updates in V25.8

Features

• Added the ability to insert Excel charts as editable charts in a presentation.
• Added support for setting the typeface of the major and minor fonts in the master theme's font scheme.
• Added the ability to extract brightness and contrast properties of an image.
• Improved adding HTML content immediately after an object.
• Added support for preserving comment hierarchy when cloning slides with modern comments.
• Added support for extracting closed captions from audio.

Fixes

• Presentation.Save...