.CLG File

File extension clg seems to be mainly related to QIP, a freeware program for online communication.

A .clg file is a text file and contains ignored or blocked contacts information (Name, ICQ number etc...).

Files with clg extension can be found as saved list of ignored contacts exported from QIP instant messenger.

How to open:

You can import these contacts to QIP format.

How to convert:

Contacts can be often exported to some exchange format (.vcf, .csv) using export function found in the program. Unfortunately, not every program has this useful function.