What Is a CHW File?
A file with the CHWfile extensionis a Compiled HTML Help index file.
It’s created when multiple CHM files are merged together.
If that doesn’t work, other programs that work includeWinCHM,ChmDecompiler, andHelp Explorer Viewer.
The best thing to do in that situation is to open it as a text file usingNotepad++.
Just upload it to that website and then choose which format you want to convert it to.
A similar website,Online-Convert.com, should convert CHM to HTML.
Still Can’t Open It?
One reason your file won’t open could be that you’re misreading the file extension.
Some files use a suffix that closely resembles “.CHW” even though the formats have nothing in common.
The same concept applies to CHM files.
You might really be using a CHML file that belongs to the Chameleon Encrypted Database file format used byKrasbitsoftware.
