.PE4 File

The pe4 file extension is mainly related to older Ulead programs like Photo Explorer or PhotoImpact.

These files contain thumbnail archives which contain smaller preview of images in photo albums. Ulead was acquired by Corel.

This pe4 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Files with pe4 file extension can be mainly found as image archives created in older Ulead programs like Photo Explorer or PhotoImpact. 

How to open:

You can view these files using XnView.

How to convert:

Possibly can be converted to other formats.