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Basic information about U3I file

When there is a problem with opening files with the file extension U3I（*.U3I or *.u3i）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the U3I file yourself.

There are 1 file types using the U3I file extension in our database. In the further part of this page, you will find detail information about all the U3I file with their brief description and a list of programs that support U3I file sorted by operating systems. The table below provides useful information about the U3I file extension. It answers questions such as:
  • What is the U3I file?
  • How to open a U3I file?
  • What programs do I need to open a U3I file?
  • What programs help to create and edit a U3I file?
  • How to convert U3I files to another file format?
  • How to convert another files to U3I file format?


1.Detail information about U3I file extension: U3 Application Information File

File type U3 Application Information File Category Text Files
Developer N/A File format XML
Description U3I file is a U3 Application Information File. Contains information about a U3 smart application (.U3P file) in an XML format; includes the application's version, download path, and working parameters.
Software programs that will open, edit or convert U3I files

Windows		 Referenced by the U3 Launcher
Editable with a text editor



Can't open a U3I file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.U3I”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the U3I extension without any issue.


Where I can download the application that support U3I file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of U3I files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a U3I file?

The reasons for the lack of the ability to open a U3I file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a U3I file. If there is still something wrong, you might want to check:

  • Whether the U3I file is damaged.
  • Whether the U3I file is incorrectly linked in the registry entries.
  • Whether the U3I file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the U3I file format is incompletely.
  • Whether the U3I file is infected.
  • Whether the drivers of the equipment used for opening a U3I file are up to date.
  • Whether your computer has enough hardware resources to open a U3I file.

If the U3I file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.