CHW File

What are CHW files and how to open them

Are you having problems opening a CHW file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a CHW file?

Files that contain the .chw file extension are normally associated with index files that are related to multiple associated CHM (compiled HTML help) file.

When a compiled HTML help file is created and the separate components (CHM files) are merged together, the CHW file is automatically created.

The CHW file contains the table of contents for the help file and the references to each CHM file that is listed within the help file table. Each time a new CHM file is added to the compiled help file list, the CHW is automatically updated.

The CHW file format is similar in nature to the GID file format.

How to open CHW files

Important: Different programs may use files with the CHW file extension for different purposes, so unless you are sure which format your CHW file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested two different CHW openers which you will find listed below.

Last updated: November 10, 2022

Various apps that use files with this extension

These apps are known to open certain types of CHW files. Remember, different programs may use CHW files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about CHW file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.