Having problems opening a CTG file?

We have programs that can open or convert your CTG files.

Opening CTG files

Did your computer fail to open a CTG file? We explain what CTG files are and recommend software that we know can open or convert your CTG files.

What is a CTG file?

Files that contain the .ctg file extension are Catalog index files. These files are created by certain Canon digital cameras. When a Canon digital camera takes a photograph, it stores the photo in a folder on the camera's memory card.

The CTG file stores information about the number of pictures that are stored in each folder located on the camera's memory card. These files allow your computer to index the files and populate them to your computer. The CTG file does not contain any actual image data, rather it just contains an index of the data contained in the folder.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension CTG

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CTG file format or software that uses files with the CTG suffix, please do get in touch - we would love hearing from you.