The IDX file extension is related to the Microsoft Outlook Express and used for its mailbox index files.

There are 6 other file types using
the IDX file extension!

empty icon.idx - Index [common]

empty icon.idx - Easy Timesheets file

idx icon.idx - Sunnysoft InterWrite file

empty icon.idx - NoX game file

empty icon.idx - Hellgate: London game archive file

empty icon.idx - Subtitle index file

Bookmark & share this page with others:

IDX file - Microsoft Outlook Express mailbox index file

What is idx file? How to open idx files?

File type specification:

Various data file type icon Various data file type

idx file icon: idx filetype icon

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.

The default software associated to idx file type:

Microsoft Outlook Express icon

Microsoft Corporation logoMicrosoft Outlook Express  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Outlook Express is an e-mail client distributed with Internet Explorer from version 4.0 to version 6.0. It is also pre-installed in several versions of Microsoft Windows, from Windows 98 to Windows XP.

Outlook Express is user-friendly and easy to use application, which supports standard POP, IMAP accounts, composing rich HTML e-mails, e-mail encryption, privacy protection, malware protection, e-mail sorting etc.

In Windows Vista is Outlook Express replaced with Windows Mail.

Help how to open:

Use Microsoft Outlook Express.

How to convert:

Use Aid4Mail.

List of software applications associated to the .idx file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open idx file, edit idx file, convert idx file, view idx file, play idx file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is ableto perform the specified software action, such as opening, editing or converting idx files.

  • Create idx file
  • Recover idx file
  • Others idx file

Programs that can create idx file - Microsoft Outlook Express mailbox index file

Programs supporting the exension idx on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Microsoft Outlook Express for create idx file action.

Microsoft Windows:

Previous file extension
IDVI file extension > Various data file types

Next file extension
file extension IDX


Follow us!

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed