IEI file format description

Many people share .iei files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .iei file can be edited, converted or printed with. On this page, we try to provide assistance for handling .iei files.

1 filename extension(s) found in our database.

.iei - Image Eye Index Cache

The IEI data files are related to Image Eye. The IEI file is an Image Eye Index Cache. Image Eye is a specialized image viewer for the sole purpose of viewing images as quickly and as practically as possible.

Image Eye
Data files
- / -
Image Eye Index Cache related extensions:
Filter Forge XML Data
Hammer Reminders Data
WAsP v8 Resource Grid
Visual UML Model Data
LayaAir Sprite3D Data
ALSee Thumbnail Cache

Naturally, other applications may also use the .iei file extension. Even harmful programs can create .iei files. Be especially cautious with .iei files coming from an unknown source!

Can't open a .iei file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .iei file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ei, idi, ie, iel, ifi, ii, iie, iri, isi, iwi, lei

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Call of Duty Skin Data
inFlow Inventory Database Backup
I-DEAS Document
DB/TextWorks Last-used Settings
IRT Cronista Infrared Image
Web of Science Databases Output

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .iei file format, then write to us! >> IEI file