File Extension Library

.CHW File Extension

  • Developer by: Microsoft
  • Category: Misc Files
  • Format: Binary

What are .CHW files and how to open them?

Can't open .CHW file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CHW file.

What is a .CHW file extension?

.CHW file extension is created by Microsoft. .CHW has been classified as Misc Files. The format of .CHW file is Binary.

.CHW is Compiled Help Index File

Help index file created when multiple Compiled HTML Help (.CHM) files are merged together; stores the combined table of contents for the Help content and also includes references to each CHM file; must be rebuilt each time any of the referenced CHM files are updated or the table of contents will not be valid.

CHW files may be very large in size because they are not compressed. However, if you use a program such as KeyCHW or The Helpware Group's FAR, you can compress CHW files and decrease the file size substantially.

The FAR software allows you to view the contents of a CHW file. Choose Authoring → Help File Explorer... from the application menu and then select your CHW file.

List of all softwares that can open the Compiled Help Index File
The Helpware Group FAR

How to fix problems with .CHW files

  1. You need to update the application that you normally use to open .CHW files. Only the latest version of the software supports the current .CHW file format
  2. You need to check the .CHW file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)