Release pdfHTML 6.3.0

Release date: Nov 13th, 2025

pdfHTML is an iText Core add-on for Java and .NET to create PDF from HTML/XML (and associated CSS).

This release brings major flexbox improvements, accessibility upgrades, and a host of bug fixes. Here’s what’s new and improved!

Major Flexbox Improvements

We’ve modernized and expanded our flexbox support, making it easier to create complex, responsive layouts for your PDFs. The improvements are based on a thorough review of our flexbox capabilities and customer requests, and include adding support for more complex justify-content values, allowing for advanced alignment options in flex layouts. We also implemented the align-self property, so individual flex items can now override container alignment for more granular control.

General handling of CSS tokens with escaped code points has been improved, so CSS parsing is now more standards-compliant and robust.

You can find an updated list of HTML/CSS features currently supported by pdfHTML on the iText Knowledge Base.

Accessibility & Standards Compliance

Support for aria-label and <label> as alternative descriptions for <textarea> has been added, bringing accessibility parity with <input> elements and improving PDF/UA compliance when using pdfHTML.

Bug Fixes

We enabled collapsing margins for flex-items’ children, ensuring margin behavior matches browser expectations. Basic support for the CSS order property has been added, letting you rearrange flex items visually without changing the HTML structure. We also investigated and improved support for area breaks inside flex containers, making sure page breaks behave logically in complex layouts.

A couple of flex-related bugs which resulted in NPEs were also resolved. One when a table inside a double flex container had a missing column width, and the other when using display: flex on headers.

Downloads

	GitHub	Maven	NuGet	Artifactory
iText pdfHTML – 6.3.0 (Java)	link	link	N/A	link
iText pdfHTML – 6.3.0 (.NET)	link	N/A	link	link

Changelog

New Features

DEVSIX-5163: Support more complex justify-content values
DEVSIX-5166: flex: Support align-self property
DEVSIX-9402: Flex: basic support of CSS order property for flex items

Improvements

DEVSIX-5196: Support collapsing margins for flex-items' children
DEVSIX-9418: Support AreaBreak inside a flex container
DEVSIX-9252: Support aria-label and <label> as alternative descriptions for <textarea> in pdfHTML

Bug Fixes

DEVSIX-8005: NPE for column width in layout when table inside double flex
DEVSIX-9266: NPE flex on header: Cannot read field "maxPositiveMargin" because "marginsCollapse" is null
DEVSIX-9139: none CSS property is not rendered in PDF output
DEVSIX-5212: CSS parsing: implement correct handling of css tokens with escaped code point

Release pdfHTML 6.3.0

Release date: Nov 13th, 2025

Major Flexbox Improvements

Accessibility & Standards Compliance

Bug Fixes

Downloads

Changelog

New Features

Improvements

Bug Fixes

eBooks

Installation Instructions

Examples (latest ones)

FAQ (latest ones)