What is a .CI File And How To Open It – Microsoft

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Have you downloaded a file with .ci extension, but you have never seen this extension before? Perhaps you know what the file is, but you simply don’t know how to open it. Fear not, in this article we will show you how to easily open the .ci file in few simple steps on various systems.

What is a .CI file?

The .CI file extension comes from Windows Content Indexer Catalog File. This file extension belongs to the developer Microsoft. This file belongs to the binary format and it is a system related files.

What to know

There is currently 1 software that can open the .ci file on 1 platform.

How to open a .CI file?

Below we have written a comprehensive guide on how to open the .CI file on various operating systems.

How to open a .CI file on Windows (7, 8, 10)

The .ci file can be opened in 4 steps on Windows.

1. In the first step you need to download the Microsoft Windows software. You will be using this software in order to open the file.

Step 2

Step 2: Locating your .CI file

2. The second step is locating the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Microsoft Windows software you have downloaded. Click on the software and click “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .CI file?

If you are still unable to open the .CI file, it might be because you are trying to open the wrong one. There are many similar file extensions that look like the .CI file.ci – The MathWorks. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .CI file with the Microsoft Windows program on Windows.