.CTG File Extension

File Type:
Canon Digital Camera Catalog File

Having trouble opening .ctg extension? Don't panic! This page explains what ctg files are as well as suggests programs you may use to open ctg files. You can download these programs through this page.

What is a CTG file?

Ctg file extension has Canon Digital Camera Catalog file type, developed by Canon, which is associated with the "misc files" category.

These are catalog index files. They are created by Canon digital cameras. CTG files contain information that details how many photos are saved in each folder of the memory card you’re using (usually up to 99). You can find files with this extension in the CANONMSC directory. It is not advisable to open or edit these files. If the corresponding images are deleted from the memory card, the camera will also erase CTG files it created. CTG files require much less space than .JPG files because they don’t store any image information. 

To learn how you can open the given file, read the information below.

ctg file icon
File Type:
Canon Digital Camera Catalog File
Misc Files

How to open CTG file?

Double click the ctg file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .ctg extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the ctg extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the ctg file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open CTG files

  • Windows Windows
    • Not meant to be opened Not meant to be opened
  • MacOS MacOS
    • Not meant to be opened Not meant to be opened

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the ctg file as well. Download Universal File Viewer for your OS.

Download for Win
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Download for Mac
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