You can check the detailed release history in HelpNDoc's what's new page.

HelpNDoc Project Importer

Introducing a new HelpNDoc project importer that makes it much easier to reuse and consolidate work across multiple projects. Authors can selectively import topics, library items, and keywords from other HelpNDoc projects, with fine-grained options to bring in only those items that are actually used or keywords that are directly related to imported topics. This streamlines project migration and ensures that only relevant, consistent content is carried over. See: HelpNDoc project importer 

New single-page Markdown template

A new publishing template has been added to export entire HelpNDoc projects as single-page Markdown files. In addition to the project's content, the generated file includes AI-friendly metadata such as project details (name, author, version, etc.) and per-topic information (IDs, captions, help contexts). This makes the Markdown output more useful not only for developers and content pipelines but also for large language models and other AI tools that can leverage structured metadata. See: Single page Markdown documentation settings 

Picture IDs and class names

Images in HelpNDoc projects can now be assigned optional IDs and CSS class names, which are carried through into all HTML-based documentation exports. This enhancement allows developers and designers to apply precise styling, interactivity, or linking behavior to images in generated documentation, increasing flexibility and control in web output. See: Working with pictures 

Copy and paste topic content as Markdown

Topic content can now be copied and pasted as Markdown, making HelpNDoc much more compatible with external Markdown editors and workflows. Authors can quickly transfer formatted content into a plain text, portable syntax that integrates seamlessly with modern publishing pipelines and collaboration tools.

Multiple topic selection in TOC

The table of contents now supports multi-selection of topics, enabling authors to reorganize, move, or delete groups of topics at once. This significantly speeds up large-scale content management tasks and makes structuring complex documentation projects more efficient and intuitive. See: Managing the table of contents 

Some other improvements and bug fixes

Many bugs are fixed with each release as indicated in the "What's new" page. Some of them include:

• Faster project opening with many library items: performance has been significantly improved when opening projects that contain large numbers of library items;
• Modernized default HTML template: All third-party libraries in the default HTML template have been upgraded to their latest versions, including a major update to Bootstrap 5;
• Improved ePub generator: The ePub export process has been overhauled to better comply with strict validation requirements;
• Window management and recent files integration fixes: Several bugs in window management have been resolved and projects saved in HelpNDoc now correctly appear in Windows' "Recent Files" list
• And much more...

Previous versions

• What's new in HelpNDoc 9 
  HelpNDoc 9 adds dark mode, a built-in AI Assistant, and a Topic Analyzer for detailed content insights. It introduces FTP(S)/SFTP publishing, topic export/printing, build-specific overrides and assets, dynamic content scripts, and a rewritten HTML importer. The PDF and HTML generators are greatly improved, with smaller, higher-quality outputs and better compatibility. Other updates include enhanced import/export, expanded code generation, style search, and many bug fixes.
• What's new in HelpNDoc 8 
  HelpNDoc 8 introduced major upgrades, becoming a 64-bit application for faster performance and improved memory handling. It added a built-in image editor, an equation library, and full SVG image support, along with per-build style overrides for customized outputs. Security and publishing features were strengthened with digital signatures, advanced encryption for Word and PDF documents, build actions, and secure storage of passwords. HelpNDoc 8 also improved usability with mass hyperlink updates, a redesigned auto-complete dialog, toolbars and filters for managing content trees, and new project starter kits. Performance enhancements included faster startup, quicker documentation generation, better imports, and more reliable scripting.
• What's new in HelpNDoc 7 
  HelpNDoc 7 brought major improvements with a brand-new, faster scripting engine, topic template support, and full Markdown generation and import. It introduced a new PDF generator for better results with less memory use, a much faster DocX importer, and an enhanced project analyzer with condition tracking. New features included counters for automatic numbering, library item hyperlinks, project backups, and expanded barcode symbologies. HTML generation was modernized with SEO improvements, accessibility updates, and new layout options, while usability was enhanced through a redesigned spell checker, script editor, and font selector. HelpNDoc 7 also added default image settings, project TOC imports, and official Windows 11 support, alongside numerous performance optimizations and bug fixes.
• What's new in HelpNDoc 6 
  HelpNDoc 6 introduced several key enhancements to improve documentation management and publishing. It added Spanish translation support, topic statuses to track progress, a description field for better SEO, and custom properties for more flexible content handling. The find-and-replace tool was upgraded with regular expressions, library item searches, and better style handling, while the user interface was refined with improved filtering, redesigned dialogs, and better high-DPI support. Other improvements included responsive image maps, stronger HTML/RTF import, better Word table of contents generation, and enhanced WinHelp importing.
• What's new in HelpNDoc 5 
  HelpNDoc 5 delivered a major refresh with a redesigned, Office 2016–inspired interface and a fully responsive HTML5 template adaptable to any screen size, complete with easy customization options. It introduced the ability to split imported Word or HTML documents into multiple topics, hide topics from the table of contents while keeping them accessible, and preview output through a built-in local web server. The PDF generator was improved to handle projects of any size with optimized file sizes, while the project analyzer gained a cleaner, more intuitive interface. Combined with speed, reliability, and format generation improvements, HelpNDoc 5 marked a significant modernization of the platform.
• What's new in HelpNDoc 4
  HelpNDoc 4 marked a major leap forward with a redesigned style system, new Word and PDF template editors, and support for reusable snippets, image maps, and conditional topic generation. It introduced features like library item grouping, keyword management, project backups, and EPUB/Kindle improvements, alongside new documentation formats such as Qt Help. Usability was enhanced with auto-completion, editable breadcrumbs, and a smarter HTML search engine, while performance improved through faster project handling, imports, and generation. With expanded scripting capabilities, multilingual support, and numerous fixes, HelpNDoc 4 laid the groundwork for more modern, flexible, and efficient documentation creation.
• What's new in HelpNDoc 3
  HelpNDoc 3 was a landmark release that introduced powerful new capabilities and laid the foundation for modern documentation workflows. It added support for generating EPUB, Mobi/Kindle, and improved HTML and CHM outputs, while enhancing Word and PDF generation with customizable templates, page numbering, and landscape support. A new build system allowed multiple customized outputs, complemented by conditional topic generation and invisible topics. Key usability upgrades included a redesigned style system, snippets, a script editor, template inheritance, auto-completion, incremental search, and persistent panel layouts. The release also brought the first project analyzer, expanded importers (CHM, ePub, Word, RTF), improved multilingual support, and significant performance and memory optimizations. Together
• What's new in HelpNDoc 2
  HelpNDoc 2 established core publishing features with new Word (DOC/RTF) and PDF export, then expanded them with a PDF table of contents, font-embedding controls, encryption/compression, and improved Unicode support. HTML/CHM output gained a searchable HTML engine, consistent relative links, collapsible/extended TOCs, better importers (CHM, HTML, Word), floating images, and a Flash library, while a new project wizard, editor speedups, and numerous fixes improved reliability.
• What's new in HelpNDoc 1
  HelpNDoc 1 laid the foundation of the platform with CHM generation, a topic editor, variables, and basic project management. Over successive updates, it gained HTML export, Word/RTF import, a spell checker, anchors, variables, and code generation for multiple languages. The introduction of a compressed HND project format, command-line compilation, better Unicode support, and a live spell checker expanded its usability, while incremental refinements improved reliability, performance, and compatibility across Windows versions.