# DITA to HTML Help (CHM)

The "htmlhelp" transform type will generate HTML output, along with the control files needed to produce a Microsoft® HTML Help file.

The HTML Help output produces HTML files rather than XHTML files. In addition to the HTML output and CSS files, this transform type will return the following files, all based on the name of the input map:

- Table of Contents (mapname.hhc)
- Sorted index (mapname.hhk)
- HTML Help project file (mapname.hhp)
- If the HTML Help compiler is located on the system, the project will be compiled to create mapname.chm

Parent topic: Available DITA-OT Transforms