CHW File - opening and understanding

Did your computer fail to open a CHW file? We explain what they are used for and recommend software that we know can open or otherwise handle your .CHW 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

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension CHW for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 3 different CHW openers which you will find listed below.

Suggest another file format using extension CHW

While we know of one file format using the .CHW file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .CHW file.

Suggest another CHW format

Various viewers for this file format

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.

	BitZipper	User submitted
	TimePassages	User submitted
	WinArc	User submitted

We have not verified any software that we know for certain will work with CHW-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!

We have not verified any web services that we know for certain will work with CHW-files. If you know one, please use the 'Suggest a program' link below and tell us about it!

Suggest a program

Not sure exactly what type of file you are trying to open? Try our new File Analyzer. It is a free tool that can identify more than 11,000 different kinds of files - most likely yours too! It will help you find software that can handle your specific type of file. Download File Analyzer here.