UU File Extension

The UU file extension was created by Developer and is also known as the Uuencoded File. UU is classified as a Encoded Files and You can open and render the contents of this file in a Text Editor. You can open UU files in uuencode program.

Uuencoded File Type

Uuencoded File Type
Extension .uu
Developer Not Available
Popularity 5.0 (227 Votes)
Mime Type text/x-uuencode
Default Program uuencode
Category Encoded Files
Format Text
Updated 6/1/2025

What is a UU File Type?

Which means Unix to Unix encoding, is most often used to transfer files to Unix-like systems. UU is seen more often with a .UUE extension.

The UU files can be decoded into the original binary file using uudecode.

Free Online UU Tools & Apps

Access powerful and secure free online UU tools to convert, view, edit, merge, split, and compare UU files — all without installing any software. Our tools support the .UU (Uuencoded File) file extension and run smoothly in any modern browser.

Select a tool below to explore features and manage your UU files directly from your device with ease.

UU Files Common Issues

There are few common issues with the Uuencoded File .UU File Extensions while opening the .UU files on Windows and MacOs, we have solution to those issues such as:

Can't Open UU Files?

  1. You must have supported software programs installed for Uuencoded File on your system such as uuencode.
  2. Associate default Uuencode uuencode program for *.uu (Uuencoded File) files.

    Associate UU Default Program on Windows
    1. Right-click a *.UU (e.g example.uu) file and click Open With.
    2. In the Open with dialog box, click Uuencode uuencode program Or click Browse to locate the program (*.exe) that you want.
    3. Select check box for Always use this app to open .uu files.

    Associate UU Default Program on MacOs
    1. Click *.UU (e.g example.uu) file and click information -> Open With.
    2. In the programs list, click Uuencode uuencode program Or other appropriate program that you want.
    3. Confirm Change for all... and Contine.
    4. A message will appear "This change will be applied to all files with .uuencode extension. By clicking Continue you confirm your selection", click Contine to apply changes.

Related UU File Extensions

UU default file extension is .UU and other similer related extensions are:

All Platform Software Programs for UU File Extension

List of all softwares that can open the UU files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Microsoft Windows logo image Open UU File on Windows

Software License Developer
ACD Systems ACDSee image. ACD Systems ACDSee 2019 for Windows Commercial ACD Systems
Smith Micro StuffIt Deluxe image. Smith Micro StuffIt Deluxe 2010 for Windows Commercial Smith Micro
Corel WinZip image. Corel WinZip 25 STANDARD for Windows Commercial Corel

MacOs logo image - FileProInfo.comOpen UU File on Mac OS

Software License Developer
Apple Archive Utility image. Apple Archive Utility 10 for MacOs Bundled Apple
Smith Micro Stuffit Deluxe Mac image. Smith Micro Stuffit Deluxe Mac 16 for MacOs Commercial Smith Micro

Linux logo image - FileProInfo.comOpen UU file on Linux

Software License Developer
uuencode image. uuencode 000 for Linux Included with OS uuencode

Website logo image - FileProInfo.comOpen UU file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen UU file on iOS

Software License Developer

Android logo image - FileProInfo.comOpen UU file on Android

Software License Developer

About Licensing

  1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
  2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
  3. Free+ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
  4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
  5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

UU file extension icon image.About UU - Uuencoded File

FileProInfo is to help you understand about the Uuencoded File with *.UU suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for UU. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

If you would like to suggest any additions or updates to this page for UU, please let us know.

Updated 6/1/2025