A daily updated filename extension database!

UI file extension

The table below provides useful information about the .ui file extension. It answers questions such as:

  • What is the .ui file?
  • What program do I need to open a .ui file?
  • How can the .ui file be opened, edited or printed?
  • How can I convert .ui files to another format?

We hope you find this page helpful and a valuable resource!

2 extension(s) and 0 alias(es) found in database

✅ QT User Interface File

UI file is a QT User Interface File. These files use an XML format to represent form elements and their characteristics for QT. Trolltech Qt is a cross-platform application framework for desktop and embedded development.
Application: QT
Mime-type: application/octet-stream
Magic number: -
Magic string: -
UI aliases:
UI related links:
UI related extensions:
QT Style Sheet

QT Resource Collection File

Qt Compiled Translation Source

QT Meta-Object Compiler File

QT Help Collection

QT Help Collection Project

QT Help Project

QT Compressed Help

QT Vertex Shader

✅ Gimp Plug-ins UI Data

UI file is a Gimp Plug-ins UI Data. GIMP (GNU Image Manipulation Program) is an image retouching and editing tool, and is released under the LGPLv3 and later versions as free and open-source software.
UI format description not yet available
Category: Data files
Application: Gimp
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
UI aliases:
UI related links:
UI related extensions:
Gimp Brush

Gimp Animated Brush

Gimp Image

CinePaint XML-tagged Image

Paint.NET Image File

Corel Paint Shop Pro Image

Corel Paint Shop Pro Pattern

Gimp Gradient File

Gimp Interpreter Definition File

Gimp Parametric Brush File

Other types of files may also use the .ui file extension.

🚫 The .ui file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

hi, ii, ji, ki, uk, ul, uu

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

MAME Highscore Data
U-Law Compressed Audio File
Haskell Interface
Uuencoded Data
IconWorkshop Extended Information
Join-Calculus Interface Source Code
Klystrack Instrument
English Language Info File

🔴 Can't open a .ui file?

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

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .ui file association, check the FAQ.

🔴 Can I change the extension of 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 the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .ui file extension, write to us!

🔴 Rate our UI page

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