If you’ve come across a file with the .idx extension and can’t open it, don’t worry—you’re not alone. The .idx extension is used by many different programs for different purposes. It is rarely a standalone file; it usually works alongside another file (like a .sub , .bak , or .dat ).
When in doubt, and try opening the other file in the folder. The .idx is almost always just a helper file. how to open .idx
You cannot simply double-click an .idx file. You need to identify what kind of .idx file it is first. If you’ve come across a file with the
Below is a breakdown of the most common types of .idx files and exactly how to open each one. What it is: When you download movie subtitles (especially from DVDs or older formats), you often get two files: .idx (index) and .sub (the actual subtitle images/text). The .idx file tells the video player when to show each subtitle. When in doubt, and try opening the other file in the folder