.PE4 File Extension
File Type 1Photo Explorer Thumbnail Archive
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.
File Type 2PhotoImpact Image Archive
.PE4 File Association 2
Archive of thumbnail images saved by PhotoImpact 4.x; contains small images that represent the larger image files stored in a photo album.
PE4 files were originally used by Photo Explorer.