Using the "File" menu, then "Import" action, HelpNDoc can import various existing documentation formats, including:
- Compiled CHM help files as well as source HHP projects;
- WinHelp HLP files;
- ePub eBooks;
- HTML web pages. This format can be split into multiple topics based on heading level or font size;
- Markdown files. This format can be split into multiple topics based on heading level;
- Text files;
- Word documents including DocX and RTF file formats. These formats can be split into multiple topics based on heading level or font size;
- Folders that can contain one or multiple of the previously mentioned formats. Each file will be imported into its own topics. See: Import folders
Additionally, for some sources (such as HelpNDoc projects, the CHM help format or HHP projects), it is possible to only import the table of contents into a new project:
- Create a new project
- In the new project wizard dialog, click the "import from existing project" link to import the table of contents of the specified file.