.PE4 File Extension

Photo Explorer Thumbnail Archive

Developer Ulead
3.3  |  6 Votes

What is a PE4 file?

Archive or cache of thumbnail images used by Ulead Photo Explorer; contains small versions of images stored in a photo album; makes it possible to quickly browse through the images in an album.

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Programs that open or reference PE4 files


PhotoImpact Thumbnail Cache

Developer Ulead
2.0  |  3 Votes

A PE4 file may also be a thumbnail cache or accompanying metadata file created by version 4 of Ulead PhotoImpact. PhotoImpact automatically creates a pair of PE4 files to store thumbnails of a user's images and information about those images. This allows PhotoImpact to efficiently display organized thumbnail galleries.

More Information

Ulead PhotoImpact is a discontinued image editing program used primarily to edit photographs. Version 4 of PhotoImpact was released in 1997.

PhotoImpact version 4 (and the fourth version of other Ulead programs, such as PhotoExplorer and iPhotoPlus) cached thumbnails of images that users had opened or viewed in a file named imageiio.pe4. It also cached image metadata in a file named imaginfo.pe4. Doing so allowed PhotoImpact to quickly load and display thumbnail images to users (in areas such as the app's sidebar file explorer).

Common PE4 Filenames

Imageiio.pe4 - Stores a PhotoImpact 4 thumbnail cache.

Imaginfo.pe4 - Stores metadata about the thumbnails in a user's imageiio.pe4 file.

How to open a PE4 file

PE4 files are not meant to be opened by users. Ulead PhotoImpact loads PE4 files, and the thumbnails they contain, automatically as needed.

Programs that open or reference PE4 files


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