The ext file extension is related to the e-mail text attachment file format.

There are 3 other file types using
the EXT file extension!

ext file icon.ext - Novadigm EDM file

ext file icon.ext - Norton Commander extension

ext file icon.ext - WS-FTP ASCII binary transfer file

Detailed description

Software that works with ext file extension

Add comment

Bookmark & share this page with others:

EXT file extension - E-mail text attachment file

What is ext file? How to open ext files?

File type specification:

Text file type icon Text file type

The ext file extension is associated with some e-mail clients.

The ext file is used to store text attachment.

It is saved in a simple text format and its content is viewable in a text editors, such as Windows Notepad, Notepad++ etc.

The default software associated to ext file type:

NotePad++ text editor icon

Notepad++ Team logo NotePad++ text editor  Microsoft Windows software

Company or developer:
  Notepad++ Team

Notepad++ is very popular free text and source code editor. It supports syntax highlighting and syntax folding for C, C++, HTML, ASP, Java, Pascal, PHP, Cobol, CSS etc. Notepad++ also supports plugins to add new features. It is localized to many languages.

Help how to open EXT files:

Use text editor to view content of .ext text attachment files.

How to convert file with extension EXT:

Currently there is no specific information available, about how to convert this file extension.

For general information try to look at:
Basic info how to convert text files

List of software applications associated to the .ext file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open ext file, edit ext file, convert ext file, view ext file, play ext 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 able to perform the specified software action, such as opening, editing or converting of the ext files.

  • Open ext file
  • Save ext file
  • Edit ext file

Software that open ext file - E-mail text attachment file

Click on the link to get more information about listed programs for open ext file action.

Microsoft Windows:

Main software associated with ext file by default:
NotePad++ text editor small icon NotePad++ text editor
Other suggested software:
Microsoft Windows NotePad small icon Microsoft Windows NotePad

Apple macOS / Mac OS X:


Previous file extension
EUC file extension > Text file types

Next file extension
file extension EXTRA


Follow us!

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

RSS feed