IDX files: what are they and how do I open them?
Are you facing difficulties opening unknown files on your computer, or wondering exactly what this file is?
We've got the information and best software solutions for opening these files effortlessly.
.idx file type #1: Index file
Files with idx extension can be usually encountered as various index files from all kind of programs and applications.
Further details:
File extension idx is traditionally used for index files. Many programs use them, but no unified format exists. Nevertheless, they are generated for the very same purposes - to speed up file or database search. You may find these indexes mainly in database programs, but even some video subtitling programs or media players use them.
These files are usually generated by programs to speed up the searching through large number of files. In most cases if you delete this file, it will be recreated the next time the index process is started again.
Index files usually contain one header record and one or many node records. The header record contains information about the root node, the current file size, the length of the key, index options and signature, and printable ASCII representations of the key1 and FOR expressions. The header record starts at file position zero.
Note: There is no connection to Internet Data Exchange and this file type.
Open file with:
Visual FoxPro
A set of tools used to create database applications and components
.idx file type #2: Easy Timesheets data
Files with idx file extension might also be found as part of Easy Timesheets time recording software.
Further details:
The idx file extension is also used in Easy Timesheets, a program for one of its data format. Easy Timesheets is a multi-user timesheet and time recording software.
The idx file stores data.
Open file with:
Easy Timesheets
A timesheet and time recording software
.idx file type #3: Hellgate: London game archive
An idx file extension is related to the Hellgate: London video game. An idx file stores game data.
Further details:
The idx file extension is associated with the computer game Hellgate: London. The idx file contains game data.
Most likely some old format without support. No further information could be found.
Open file with:
Hellgate: London
Horror video game from London
.idx file type #4: Microsoft Outlook Express mailbox index
An idx file extension is related to the Microsoft Outlook Express and used for its mailbox index files.
Further details:
The idx file extension is associated with Microsoft Outlook Express, an e-mail and news client included in earlier releases of Microsoft Internet Explorer.
The latest edition of Outlook Express is called Microsoft Mail Live.
The idx files are used for indexing of mail messages.
Open file with:
Microsoft Outlook Express
Default e-mail client installed in older Windows
.idx file type #5: NoX game data
An idx file extension is related to NoX computer game developed by Westwood Studios. An idx file stores game data resources.
Further details:
The idx file extension is associated with NoX, an action role-playing game developed by Westwood Studios and released in 2000.
The idx file contains various data resources for NoX game.
Open file with:
NoX
An action role-playing game from high fantasy parallel universe
.idx file type #6: Subtitle index file
Files with idx suffix may also be found along graphic subtitles as their indexes. Contains timings and other related information about the subtitles.
Further details:
File extension idx is also used for subtitle index files. These are typically found along actual (graphics) movie subtitles (.sub etc.) and act as metadata and index files. Usually contain timing, language, and bitmap information (colors) but not the subtitles.
Both the index and the associated subtitle file is needed for a successful playback of graphic SUB subtitles. Text based subtitles do not need these files at all.
Open file with:
VobSub
A plug-in for VirtualDub
.idx file type #7: Sunnysoft InterWrite data
An idx file extension is related to the Sunnysoft InterWrite and used for its data files. Probably obsolete.
Further details:
The idx file extension used by Sunnysoft InterWrite, a software for Windows Mobile platform.
The idx file contains some kind of data used by InterWrite.
Most likely some old format without support. No further information could be found.
Open file with:
InterWrite Pro
A program used to localize Windows Mobile PDAs, MDAs, smartphones etc.