UU File - opening and understanding

Did your computer fail to open an UU file? We explain what they are used for and recommend software that we know can open or otherwise handle your .UU files.

What is an UU file?

An .UU file is an UUEncoded file. Files using the .uu file extension are uuencoded Unix files. The word "uuencoded" is derived from the Unix-to-Unix encoding process.

The Uuencode program takes the application's binary files and converts them into a text-based file format. These files are commonly used to email documents and prevent the documents from being corrupted during file transfer. The UCCP process converts characters between computer character sets.

These files are often destroyed when a user tries to open the file if the file has not been unencoded. Hence, the UUENCODED file format.Once a file has been sent using the UU file format, the file must be unencoded before the recipient can open the original file on his or her hard drive.

How to open UU files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension UU for different purposes. We have identified 4 UU openers for Windows that is compatible with this specific type of UU file.

Programs that open these files

BitZipperBitZipperVerified
WinZipWinZipVerified
WinRARWinRARVerified
PowerArchiverPowerArchiverVerified
We have not yet verified any programs for Mac that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!
We have not yet verified any web services that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Suggest another file format using extension UU

While we know of one file format using the .UU file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .UU file.