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.UI File Extension

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File TypeUser Interface File

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CategoryDeveloper Files


This file is saved in an XML format. You can view the XML structure and contents of the file in a text editor.


Stores the user interface configuration for a program; saved in an XML format and contains definitions of Qt widgets with slots and signals; can be viewed in a basic text editor or opened with a UI designer program.

More Information

UI files can be created using Qt Designer and Qt Creator, which are part of the Qt SDK.

NOTE: Qt SDK was previously developed by Nokia before Digia acquired the software.

Program(s) that open .UI files
Microsoft Windows LogoWindows
Digia Qt SDK
Any text editor
Mac OS X LogoMac
Digia Qt SDK
Any text editor
Linux LogoLinux
Digia Qt SDK
Any text editor
Updated 10/14/2014