ATT File Extension

ATT file icon
Web Form Data Format
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    3.1 (16 votes)

What is ATT file?

ATT is a data file format used for storing Web form data. ATT files contain data from filled Web forms.

When ATT files are generated?

ATT file is generated when contents of Web forms are submitted by user. If the form has incorrect encoding, an ATT file is generated and sent to recipient via email to the address defined by programmer in the form of an email attachment with a filename postdata.att .

Additional information

  1. ATT file stores data in text format and its structure is similar to a CSV file.
  2. Data fields from ATT file can be imported into an Excel spreadsheet.

Programs which support ATT file extension

Below you will find an index of software programs that can be used to open ATT files divided into 2 categories according to system platform supported. Files with ATT suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Programs that support ATT file

Updated: 02/02/2020

How to open file with ATT extension?

Being unable to open files with ATT extension can be have various origins. Fortunately, most common problems with ATT files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Get the Windows Notepad

Install software to open ATT file The main and most frequent cause precluding users form opening ATT files is that no program that can handle ATT files is installed on user’s system. The most obvious solution is to download and install Windows Notepad or one to the listed programs: Text editor, Post Data Spider, NotePad++ text editor. Above you will find a complete listing of programs that support ATT files, classified according to system platforms for which they are available. If you want to download Windows Notepad installer in the most secured manner, we suggest you visit Microsoft Corporation website and download from their official repositories.

Step 2. Verify the you have the latest version of Windows Notepad

Update software that support file extension ATTIf you already have Windows Notepad installed on your systems and ATT files are still not opened properly, check if you have the latest version of the software. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. This can be one of the causes why ATT files are not compatible with Windows Notepad. The latest version of Windows Notepad should support all file formats that where compatible with older versions of the software.

Step 3. Assign Windows Notepad to ATT files

If the issue has not been solved in the previous step, you should associate ATT files with latest version of Windows Notepad you have installed on your device. The method is quite simple and varies little across operating systems.

Associate software with ATT file on Windows

The procedure to change the default program in Windows

  • Clicking the ATT with right mouse button will bring a menu from which you should select the Open with option
  • Click Choose another app and then select More apps option
  • Finally select Look for another app on this PC, point to the folder where Windows Notepad is installed, check the Always use this app to open ATT files box and conform your selection by clicking OK button
Associate software with ATT file on Mac

The procedure to change the default program in Mac OS

  • Right-click the ATT file and select Information
  • Open the Open with section by clicking its name
  • Select the appropriate software and save your settings by clicking Change all
  • A message window should appear informing that This change will be applied to all files with ATT extension. By clicking Continue you confirm your selection.

Step 4. Verify that the ATT is not faulty

Should the problem still occur after following steps 1-3, check if the ATT file is valid. Being unable to access the file can be related to various issues.

Check ATT file for viruses
1. Verify that the ATT in question is not infected with a computer virus

If the ATT is indeed infected, it is possible that the malware is blocking it from opening. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the ATT file is indeed infected follow the instructions below.

2. Check whether the file is corrupted or damaged

Did you receive the ATT file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. It could happen the the download process of file with ATT extension was interrupted and the file data is defective. Download the file again from the same source.

3. Check if the user that you are logged as has administrative privileges.

Some files require elevated access rights to open them. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Windows Notepad

The operating systems may note enough free resources to run the application that support ATT files. Close all running programs and try opening the ATT file.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Web Form Data Format files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle ATT files.

Do you want to help?

If you have additional information about the ATT file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on ATT file.

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