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Microsoft HTML Help Downloads

All HTML Help downloads are now available from the Download Center.


The latest version of the HTML Help technology is 1.4, as is the SDK. The latest version of HTML Help Workshop is 1.3. As of June 2009 there is no HTML Help Workshop 1.4.


HTML Help Workshop

Download Htmlhelp.exe

A Japanese version of HTML Help Workshop is also available:

Download Htmlhelpj.exe

HTML Help documentation


The documentation includes the following files.

  • HTML Help Authoring Guide (Htmlhelp.chm)

    Shows how to plan, create, and compile Help projects using HTML Help Workshop.

  • HTML Help ActiveX Control Reference (Hhaxref.chm)

    Explains the parameters, commands, and methods of the HTML Help ActiveX Control.

  • HTML Help API Reference (Api.chm)

    Covers the commands, structures, and notification messages for the HTML Help API.

  • HTML Reference (Htmlref.chm)

    A basic HTML reference for Help authors.

  • Help for the HTML Help Viewer (Viewhlp.chm)

    A redistributable set of topics that provide help for the HTML Help viewer. These can be customized according to your needs.

  • HTML Help API Library File (Htmlhelp.lib)

End-User License Agreement

The end-user license agreement (EULA) is part of the HTML Help download. You can view the agreement before you download the product.

System Requirements

You must set up Microsoft Internet Explorer (3.0 or later) on your computer before using HTML Help. Internet Explorer 4.0 or later is recommended. If you haven't already, please download the latest version of Internet Explorer. For more information, visit

HTML Help requires about 8 MB of free disk space.


Close any open instances of HTML Help Workshop before reinstalling or updating to a new version. If you do not, the HTML Help ActiveX control may be registered incorrectly.


To install, right-click the link to the desired file, select "Save Target As", and choose a location on your local computer. After the file is downloaded, you can double-click on it to run the installer.

Windows XP, 2000, ME, and 98 users should not run Hhupd.exe. Any urgent updates will be handled by means of service packs or Windows Update.

The HTML Help Installation and Update Package (any language version of Hhupd.exe) will not run on a Windows NT system unless you have administrator privileges.

There are no plans to add any new features to HTML Help.