.IDX File Extension

File Type:
Movie Subtitle File

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

What is a IDX file?

Idx file extension has Movie Subtitle file type, which is associated with the "misc files" category.

Typically used by DVD playback programs, the data file allows displaying subtitles. It saves both the subtitle text and cue points indicating specific time for each subtitle to be displayed.

IDX files usually come with corresponding video files. They are quite similar to .SUB files.

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

idx file icon
File Type:
Movie Subtitle File
Misc Files

How to open IDX file?

Double click the idx 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 .idx 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 idx 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 idx 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 IDX files

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 idx file as well. Download Universal File Viewer for your OS.

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