.THEME File Extension

The GTK+ Project
File Type:
GTK Theme Index File

Having trouble opening .theme extension? Don't panic! This page explains what theme files are as well as suggests programs you may use to open theme files. You can download these programs through this page.

What is a THEME file?

Theme file extension has GTK Theme Index file type, developed by The GTK+ Project, which is associated with the "settings files" category.

Associated with GTK, the file stores settings for a desktop theme, such as name, icons, type, fonts, color schemes, etc. It uses a plain text format. THEME files can also come as part of a .GTP theme package.

To learn how you can open the given file, read the information below.

theme file icon
The GTK+ Project
File Type:
GTK Theme Index File
Settings Files

How to open THEME file?

Double click the theme file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .theme extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the theme extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the theme file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open THEME files

  • Linux Linux
    • GNOME Desktop GNOME Desktop

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the theme file as well. Download Universal File Viewer for your OS.

Download for Win
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Download for Mac
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