.H1W File

.h1w is Microsoft Windows Help keyword index

Key Features: .H1W File Extension

What's on this Page

The h1w file extension is associated with the Microsoft Windows Help, a help document authoring tool for Microsoft Windows operating system.

The h1w file stores keyword index created by Microsoft Windows Help.

Probably not meant to be accessed by the user.

Probably cannot be converted to anything else.

Associate the H1W file extension with the correct application. On :
Windows: Right click on any H1W file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.H1W files". Mac: Right click (or Ctrl-click) the H1W file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
Update your software that should actually open .H1W is Microsoft Windows Help keyword index. Because only the current version supports the latest H1W file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available .H1W is Microsoft Windows Help keyword index update.
To make sure that your H1W file is not corrupted or virus-infected, get the file again and scan it with antivirus software.