IDX File

What are IDX files and how to open them

Are you having problems opening an IDX file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an IDX file?

IDX files have multiple uses, and VobSub Subtitles Index is one of them. Read more about the others further down the page.

VobSub Subtitles Index File

Several DVD playback applications create files that contain the .idx file extension. These files contain information about the subtitles of a DVD, including the subtitle text and start points for when the subtitles should be shown.

The IDX file does not contain any actual video data. Instead, the video data is stored in an associated video file that is linked to the appropriate IDX file.

How to open IDX files

Important: Different programs may use files with the IDX file extension for different purposes, so unless you are sure which format your IDX file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 10 different IDX openers which you will find listed below.

Last updated: November 14, 2022

All known file formats using extension .IDX

While VobSub Subtitles Index File is a popular type of IDX-file, we know of 6 different uses of the .IDX file extension. Different software may use files with the same extension for different types of data.

TheWord Bible Text Index File

We know that one IDX format is TheWord Bible Text Index File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

IDX opener for Windows

We have identified one IDX opener that is compatible with this specific type of IDX file.


More file formats using the IDX extension

Through our research of IDX files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Amstrad PPC Organiser Index File
  • Foto-Mosaic-Edda Database Index File
  • Java Applet Cache Index File
  • Parsons Technology Resource Index File

Various apps that use files with this extension

These apps are known to open certain types of IDX files. Remember, different programs may use IDX files for different purposes, so you may need to try out a few of them to be able to open your specific file.

PotPlayerPotPlayerUser submitted
ChocoPlayerChocoPlayerUser submitted
RealPlayerRealPlayerUser submitted
ALPlayerALPlayerUser submitted
PotplayerBitsPotplayerBitsUser submitted
adrenalinadrenalinUser submitted
SPlayerSPlayerUser submitted
GoPlayerGoPlayerUser submitted
WinEdtWinEdtUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about IDX file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.