The ci file extension is related to the Microsoft Windows operating system. The ci file stores content indexer catalog.

There are 3 other file types using
the CI file extension!

ci icon.ci - Microsoft SharePoint Server 2007 temporary data

empty icon.ci - CitectSCADA data

empty icon.ci - MathWorks PolySpace preprocessed code

Detailed description

Software that open ci file

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CI file extension - Microsoft Windows content indexer catalog file

What is ci file? How to open ci files?

File type specification:

Various data file type icon Various data file type

The ci file extension is associated with the Search Service  (also known as Indexing Service) integrated to Microsoft Windows operating system.

The ci file stores some kind of data used by Windows Search Service.

The default software associated to open ci file:

Microsoft Windows icon

Microsoft Corporation logoMicrosoft Windows  Microsoft Windows software

Company or developer:
Microsoft Corporation

A family of operating systems developed by the Microsoft Corp. The first Windows was released in 1985 as a GUI add-on to MS-DOS. MS-DOS based Windows versions were developed to 2000, when was released the last version called Windows ME. Windows based on NT core started in 1993. Windows NT family are developed to these days, the latest version is called Microsoft Windows 11.

Help how to open:

Due the variability and uncertainty of this file type group, there is no general information available, about how to open this various data file format. However most files with extension from this group are usually not meant to be opened or viewed directly. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

For general information try to look at:
Identifying unknown file formats

How to convert:

Due the variability and uncertainty of this file type group, there is no general information available, about how to convert this various data file format. However most files with extension from this group are usually not in formats, which can be converted. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

List of recommended software applications associated to the .ci file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ci file, edit ci file, convert ci file, view ci file, play ci file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with ci file - Microsoft Windows content indexer catalog file

Click on the software link for more information about Microsoft Windows. Microsoft Windows uses ci file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

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