.CHK File

File extension chk is mainly associated with ScanDisk utility used to check errors in file system or physical errors on hard drive. It is available in MS-DOS as well as in Windows.

The .chk file contain fragments cleaned from the disk. When Microsoft Windows disk checking programs find errors on your hard disk they usually save the "lost" data fragments to chk files.

How to open:

These files can generally not be opened, but could habe been recovered with a special software.

How to convert:

It is unlikely that you can convert *.chk files to anything else.