The Xceed June 2026 release delivers major updates across six products. The headline release is Xceed Words for .NET 6.0, introducing a powerful Word-to-HTML conversion engine, flexible document splitting, advanced charting capabilities, and numerous document-generation enhancements. Additional updates arrive for Xceed SFTP for .NET 7.4, Xceed PDF Library for .NET 3.0, Xceed Toolkit Plus for WPF 5.2, Xceed DataGrid for WPF 7.3, and Xceed Zip for COM/ActiveX and x64 6.6.
This is our summer 2026 release, and it brings meaningful improvements across six products. Xceed Words for .NET 6.0 is the clear centerpiece, while Xceed SFTP for .NET 7.4 introduces post-quantum cryptography designed to protect future communications.
Updates also ship for Xceed PDF Library for .NET, Toolkit Plus for WPF, DataGrid for WPF, and Xceed Zip for COM/ActiveX and x64. Here's what you need to know.
Xceed Words for .NET 6.0
We jumped Words a full version, from 5.2 directly to 6.0, because the capabilities introduced in this release warrant it. The largest addition is a brand-new HTML export engine, but there are significant improvements throughout the product.
Export Word Documents to HTML
You can now convert Word documents into clean, standards-compliant HTML with a single API call using the new ConvertToHtml method on DocX.
Simple HTML Conversion
document.ConvertToHtml("document.html");
The exporter gives developers extensive control over the generated output. CSS can be emitted as inline styles, embedded stylesheets, or external files. Images may be embedded as Base64 data URIs, exported separately, or omitted. Fonts can be referenced, embedded, or written as standalone font files.
Support extends across eight document standards, from modern HTML5 through XHTML 1.1, allowing integration with a wide range of publishing systems, CMS platforms, and content pipelines.
Accessibility options include semantic HTML5 output, ARIA role generation, and preservation of image alternative text.
- Preserves complex content: Multi-level lists, tables, headers, footers, footnotes, tracked changes, picture bullets, and embedded fonts.
- Deterministic output: Generate byte-stable HTML suitable for source control and clean file diffs.
- Custom naming: Re-prefix generated classes and IDs for white-label solutions.
- Accessibility support: Semantic markup with ARIA and preserved alt text.
If you've ever attempted to build a custom Word-to-HTML converter, you know how quickly edge cases multiply. ConvertToHtml replaces months of maintenance with a single, production-ready API.
Flexible Document Splitting
A new Split overload introduces the SplitOptions model, enabling documents to be divided using six different structural markers:
- Headings
- Section breaks
- Signets
- Content controls
- Page breaks
- Column breaks
Each marker type includes dedicated options exposing only relevant settings. Developers can match bookmarks using regular expressions, split at specific heading levels, filter by section break type, or divide documents every N page breaks with configurable limits.
Existing splitting functionality remains fully compatible. The new overload extends capabilities without changing current implementations.
Bigger, More Controllable Charts
This release significantly expands chart generation through pure OOXML. No Microsoft Office installation, COM interop, or server-side licensing is required.
New Charting Features
Programmable data labels, custom number formatting, leader lines, per-point label control, configurable gridlines, per-point coloring, combo charts, logarithmic axes, and straight-line rendering are now fully supported.
Behind the scenes, a new canonical ordering engine ensures generated chart XML follows the proper schema sequence. The result is fewer repair prompts and improved compatibility when opening generated documents in Word.
Additional Words 6.0 Enhancements
Several other improvements round out the release:
- List presets: Up to 20 predefined list styles.
- Text columns: Multi-column page layouts with built-in presets.
- Automatic image format detection: PNG, JPEG, and GIF support from streams.
- Cross-document paragraph insertion: Preserve hyperlinks, charts, comments, and images.
- Table of contents markers: Create structured TOCs across merged documents.
- PDF conversion fixes: Six corrections covering alignment, merged cells, missing content, and memory issues.
Xceed SFTP for .NET 7.4
SFTP for .NET 7.4 introduces a major security enhancement: post-quantum SSH key exchange support.
Post-Quantum Key Exchange
The hybrid algorithm mlkem768x25519-sha256 is now supported and enabled by default. During SSH negotiation, compatible servers can automatically use this algorithm without requiring code changes.
Why It Matters
Post-quantum cryptography helps defend against "store now, decrypt later" attacks, where encrypted traffic is captured today and decrypted years later once sufficiently powerful quantum computers become available.
The hybrid design combines ML-KEM with Curve25519 and SHA-256, ensuring security remains at least as strong as the traditional method even if future cryptanalysis weakens the post-quantum component.
Xceed Zip for COM/ActiveX and Xceed Zip for x64 6.6
Version 6.6 introduces support for dramatically larger file and path names.
- Previous limit: 260 characters
- New limit: 32,700 characters
This aligns with modern Windows path support and allows deep directory structures and exceptionally long filenames to be archived without issue.
The enhancement requires a 6.6 license to unlock the expanded limits, though existing licenses remain fully compatible with the release.
Xceed PDF Library for .NET 3.0
PDF Library advances from version 2.0 to 3.0 with a strong focus on editing existing PDFs rather than simply generating new documents.
Edit Existing PDF Content
Developers can now search, replace, remove, and restyle text directly within loaded PDFs.
PDF Editing Workflow
page.ReplaceText(results, "New Value");
page.UpdateTextStyle(results, styleOptions);
The same editing flexibility now extends to graphics, allowing modification of image bounds, opacity, brushes, and path properties without rebuilding entire pages.
Additional improvements include JPG support, transparency preservation during save operations, expanded watermark capabilities, and a new EncryptionOptions model supporting multiple encryption profiles and granular permissions.
Xceed Toolkit Plus for WPF 5.2
Toolkit Plus receives two new controls along with important AvalonDock fixes.
- ChatControl: A XAML-defined chat interface with customizable message bubbles, timestamps, typing indicators, and input controls.
- WrapPanel ListBox View: Items can now flow horizontally or vertically across rows and columns based on available space.
AvalonDock also receives fixes for routed commands inside auto-hide windows and improved resizing behavior for docked content.
Xceed DataGrid for WPF 7.3
DataGrid remains on version 7.3 intentionally. This release focuses on a specific stability and accessibility improvement.
Grouped rows and their children now remain visible and correctly exposed through UI Automation. This improves automated testing reliability while ensuring assistive technologies accurately report grid content to users.
Suite Updates
Both Xceed Business Suite and Xceed Ultimate Suite now include Xceed Words for .NET 6.0 and Xceed PDF Library for .NET 3.0.
Customers licensed through either suite automatically receive HTML export capabilities, PDF editing APIs, and every other enhancement included in these releases.
Release Highlights Checklist
- Words 6.0: Word-to-HTML conversion, advanced splitting, chart enhancements, and document-generation improvements.
- SFTP 7.4: Post-quantum SSH key exchange enabled by default.
- PDF Library 3.0: Direct PDF editing, encryption, graphics manipulation, and enhanced watermarking.
- Zip 6.6: Support for Windows-length paths up to 32,700 characters.
- Toolkit Plus 5.2: New ChatControl and WrapPanel ListBox support.
- DataGrid 7.3: Improved UI Automation support for grouped content.
Ready to update? All Summer 2026 releases are available now, including Xceed Words for .NET 6.0 and Xceed PDF Library for .NET 3.0. Start a free trial or browse the latest NuGet packages to bring these improvements into your applications today.
Frequently Asked Questions
What is the biggest feature in the June 2026 release?
The largest addition is the new Word-to-HTML conversion engine in Xceed Words for .NET 6.0, which generates standards-compliant HTML with extensive customization options and strong support for complex document structures.
Do I need Microsoft Office installed to generate charts in Words 6.0?
No. All chart generation is performed through OOXML and does not require Office, COM interop, or server-side Office licensing.
Is post-quantum SSH enabled automatically in SFTP for .NET 7.4?
Yes. The new mlkem768x25519-sha256 hybrid key exchange algorithm is enabled by default and negotiated automatically with compatible SSH servers.
Can PDF Library 3.0 edit existing PDFs?
Yes. Version 3.0 introduces direct text search, replacement, removal, style modification, graphic editing, enhanced encryption, and advanced watermarking capabilities.
Are these updates included in Xceed Business Suite and Ultimate Suite?
Yes. Both suites now include Xceed Words for .NET 6.0 and Xceed PDF Library for .NET 3.0, along with all associated features and improvements.