Files with .att extension contain data from online web forms. The .att files can be opened in text editors like Notepad or Notepad++. Conversion to other formats is not possible.
The .att file extension has two file types. The most common is the Web Form Post Data file. This file is created by web forms when users submit data in a web browser. It contains contents from a web form that have been emailed to the recipient with the file name postdata.att.
ATT files are commonly received via email when the encoding type is incorrect. For example, the encoding type may be “text” instead of “text/plain”.
ATT files are received as an attachment to emails when the encoding type is incorrect. Applications that open ATT files include Notepad, Notepad++, and Atom text editors.
The second file type is the Alphacam Lathe Tool file created with Alphacam CAD application. Alphacam is available in a paid version and is compatible with Windows XP or later.
If the ATT file is an AT&T Group 4 bitmap file, you can open it using XnView to view contents.
To open ATT files install latest system, drivers and programs on your computer. Outdated software may prevent opening Web Form Data Format ATT files.