Aspose.HTML for Python via .NET Releases

Released: Apr 26, 2026

Updates in V26.4

Features

  • Added support for named @page rules with mixed page sizes in the generated output.
  • Improved tagged PDF generation for nested and definition lists, ensuring correct structure tree mapping and accessibility semantics.
  • Enhanced Flex layout handling and standards compliance for complex sizing and alignment scenarios.

Fixes

  • Fixed an ArgumentException that could occur when processing auto values during HTML layout.
  • Fixed PDF rendering problems when drawing complex borders and paths.
  • Fixed...

Released: Mar 20, 2026

Updates in V26.3

Features

  • MHTML - Added the ability to select and render specific attachments.

Fixes

  • MHT to PDF - Embedded images are missing in the output.
  • HTML-to-Tagged-PDF - Definition lists incorrectly mapped to L/LI structure elements — PDF/UA "inappropriate LI" warning (v26.x).

Released: Feb 27, 2026

Updates in V26.2

Fixes

  • HTML to PDF: Table max-width property is not applied correctly.
  • Fixed specifying page size settings so that they have no effect on the content max width/max height.
  • Error in ValidateWebsiteTest.
  • Incorrect document encoding detection.
  • Exception when converting EPUB to PDF.
  • Font information gets lost for unicode characters when converting from HTML to DOCX.
  • Aspose is unable to convert large HTML file to PDF.

Released: Jan 29, 2026

Updates in V26.1

Fixes

  • HTML to PDF: High Memory and CPU usage.
  • HTML to Image (Single Image).
  • Exception is thrown when trying to convert particular HTML to DOCX.
  • Table row splitting between pages when converting HTML to PDF.
  • HTML to PDF conversion runaway memory usage.
  • XHTML to PDF conversion issues.

Released: Dec 22, 2025

Updates in V25.12

Features

  • Implemented a CSS Grid layout
    • Full implementation of the CSS Grid Layout algorithm, compliant with the CSS Grid Layout Level 1 specification.
    • Support for core properties: grid, grid-template-, grid-auto-, grid-row*, grid-column*, grid-area, and gap*.
    • Advanced capabilities: explicit and implicit grid resolution, along with auto-placement logic.
    • API Expansion: Introduction of asynchronous methods to the public API.
    • Layout Property Updates: The align-, justify-, and place-* properties have...

Released: Nov 28, 2025

Updates in V25.11

Features

  • Implemented a new SVG rendering algorithm that displays only visible elements on each page, eliminating glitches, dramatically reducing processing time, memory consumption, and the size of the output PDF file.

Fixes

  • Crash during conversion.

Released: Nov 12, 2025

Updates in V25.10

Features

  • Improved FORM element handling:
    • Reduced memory usage and faster loading of large HTML documents.
    • Optimized Arabic font processing.
    • Introduced support for the DPCM CSS unit.

Fixes

  • HTML to PDF: Styles are not applied in PDF output.
  • MHT to PDF - exception -System.NullReferenceException.

Released: Sep 26, 2025

Updates in V25.9

Features

  • Advanced Text and Symbol Rendering - The processing and rendering of complex text content have been significantly improved:
    • SVG Text Decorations: Extended support for text decorations in SVG, specifically adding the line-through property.
    • Extended Unicode Support: Improved handling of emojis and characters from extended Unicode range (≥ 0x10000) through:
      • Implementation of format 12 sub-table support in font CMAP tables.
      • Enhanced parsing of HTML numeric character references beyond 16-bit...

Released: Aug 27, 2025

Updates in V25.8

Features

  • Memory Efficiency: Significantly optimized memory usage for operations involving pseudo-element style processing and general HTML element rendering. This reduces the overall memory footprint of the application.
  • Document Loading: Memory consumption when opening and loading HTML documents has been reduced.
  • Network Operations: The processing of network requests and the handling of StreamContent have been optimized for better efficiency and reliability.
  • SVG Text: Improved the fidelity of...

Released: Jul 23, 2025

Updates in V25.7

Fixes

  • MHTML input results in unreadable PDF output.
  • When trying to save a file as PDF you get a NullReferenceException.
  • Fails when recognizing the installed Helvetica Neue LT Std font and throws a NullReferenceException.
  • System.NullReferenceException: Object reference not set to an instance of an object.
  • Unable to convert a web-page content to PDF - System.ArgumentException: Incompatible unit types.