HelpNDoc (/ˈhɛlpənˌdɒk/ HELP-ən-dok[1]) is a Windows-based help authoring tool published by French company IBE Software.

[2] HelpNDoc allows the writer to create a single source text which it then converts to a number of target formats such as: HelpNDoc integrates a WYSIWYG editor which aims to look like popular word processing software such as Microsoft Word or OpenOffice.org Writer.

As of version 4 HelpNDoc comes with a project analyzer that can track the document’s layout, provide statistics and identify potential problems such as broken links or problems with media items.

HelpNDoc can also be used to publish mobile websites, using the table of contents as a navigation menu, the content of the topics with navigation buttons, the keyword index menu, a built-in search engine, and mobile-specific user interface elements.

The Standard Edition removes those ads from the CHM- and HTML-generated documentation.