.HA File

The ha file extension is used for the default archive format of some older HA archiving tool.

Looks like one of the many file compressors that were made, but this one did never become popular.

Files with ha file extension may be usually found as archives compressed using somewhat older HA file compression tool. 

How to open:

Some file manager and archving tools still support HA format and can decompress the files.

How to convert:

You can repack *.ha archives to *.zip or any other similar compressed archive.