.UU File Extension
Uuencoded File
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What is a UU file?
File created by uuencode, a Unix program used for converting binary data to text; contains the textual encoding of an original binary file; often used to email a binary file in a text format so that the file does not become corrupted.
More Information
"UU," which stands for "Unix to Unix encoding," is most commonly used to transfer files on Unix-based systems. UU files are more often seen with a .UUE extension.
UU files can be decoded back into the original binary file using uudecode.
Programs that open UU files
Windows
Free Trial
Mac
Included with OS