An att file extension is related to AT&T Group 4 bitmap graphics file format.

There are 4 other file types using
the ATT file extension!

empty icon.att - Web Form Data

att icon.att - Alphacam lathe tool data

empty icon.att - SeeYou waypoint

empty icon.att - ZipLip secure e-mail message

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ATT file extension - AT&T Group 4 bitmap graphics

What is att file? How to open att files?

File type specification:

Bitmap image file type icon Bitmap image file type

att file icon: att filetype icon

The att file extension is associated with the AT&T Group 4 bitmap graphics file format used to store FAX messages in electronic form.

The AT&T Group 4 bitmap graphics format seems to be obsolete and not supported by current FAX applications, but it is viewable in XnView picture image editing software.

Bitmap graphics (FAX file).

This att file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Updated: June 14, 2019

The default software associated to open att file:

XnView MP icon

Pierre-Emmanuel Gougelet logoXnView MP  Multiplatform software

Company or developer:
Pierre-Emmanuel Gougelet

A free (for non-commercial purposes) powerful cross-platform media browser, viewer and converter. Compatible with more than 500 formats and also supports export to 70 different file formats. It works on Windows, Linux and macOS (OS X).

Help how to open:

Use XnView to open *.att files.

How to convert:

Probably can be exported to other formats.

List of recommended software applications associated to the .att 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 att file, edit att file, convert att file, view att file, play att file etc. (if exist software for corresponding action in File-Extensions.org's database).

att file viewer - programs that view att file - AT&T Group 4 bitmap graphics

Programs supporting the exension att on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about XnView MP for view att file action.

Multiplatform:

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ATR file extension

File-Extensions.org > Bitmap image file types

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file extension AVIF

 

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