What is a .ALT File And How To Open It – Microsoft (Guide)

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While downloading files, you might have downloaded a file with the .alt extension. Perhaps you know what the file is, but you simply don’t know how to open it. That’s why we have made this article! You will learn how to open the .alt file extension on various systems, what it is and how to work with it.

What is a .ALT file?

The .ALT file extension is from Dynamics AX Temporary File. The developer of this file extension is Microsoft. The file is a miscellaneous file.

What to know

There is currently 1 software that can open the .alt file on 1 platform.

How to open a .ALT file?

Below we have written a comprehensive guide on how to open the .ALT file on various operating systems.

How to open a .ALT file on Windows (7, 8, 10)

The .alt file can be opened in 4 steps on Windows.

1. The first step is to download the Microsoft Dynamics AX software. This software will be used for opening the file.

Step 2

Step 2: Locating your .ALT file

2. The second step is locating the downloaded file. The file can be usually found in your /download/ folder if you don’t remember where you have downloaded it to.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. In the fourth step, after clicking “Open with”, you should see the Microsoft Dynamics AX software that you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .ALT file?

If you cannot open the .ALT file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .ALT file.alv – Adobe Systems, .alx – Research In Motion, .alx – Microsoft, .alx – Alpha Software, .alz – ESTsoft. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .ALT file with the Microsoft Dynamics AX program on Windows.