ALT file format description

Many people often share .alt files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .alt files. To address this issue, we have created this page to offer assistance and guidance on handling .alt files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .alt files.

Our aim is to simplify the process and promote seamless use of the .alt file format.

4 filename extension(s) found in our database.

.alt - Microsoft Dynamics AX Application Label Temporary File

The ALT other files are related to Microsoft Dynamics AX. The ALT file is a Microsoft Dynamics AX Application Label Temporary File. Microsoft Dynamics AX is one of Microsoft's enterprise resource planning software products. It is part of the Microsoft Dynamics family.

Application:Microsoft Dynamics AX
Category:Other files
Magic:- / -

Microsoft Dynamics AX Application Label Temporary File related extensions:

  • pfile Microsoft Rights Management Protected Data
  • vsmacro Microsoft Visual Studio Macro
  • ahd Microsoft Dynamics AX Online Help Data
  • glk Microsoft Office 2007 Groove Synchronization Shortcut
  • trx_dll Microsoft Office Dynamic Link Library
  • act Microsoft Office Assistant Actor

.alt - Corel WordPerfect Menu Library

The ALT data files are related to Corel WordPerfect. The ALT file is a Corel WordPerfect Menu Library. Corel WordPerfect is a word processing application.

Application:Corel WordPerfect
Category:Data files
Magic:- / -

Corel WordPerfect Menu Library related extensions:

  • psppalette Corel Paint Shop Pro Palette
  • odoc Synology Office Document Pointer
  • egt EagleGet Data
  • puhs Universal Hint System Hints Source
  • adj BenMAP Adjustment Factor File
  • sd4lf Smart Diary Suite 4 Life Factor Package

.alt - Steam ALT Data

The ALT data files are related to Steam. The ALT file is a Steam ALT Data. Steam is a digital distribution, digital rights management, multiplayer and communications platform developed by Valve Corporation.

Category:Data files
Magic:- / -

Steam ALT Data related extensions:

  • acf Steam Application Cache Data
  • cachedmsg Valve Steam Cache Data
  • crash Steam Crash Data
  • csm Steam Client Game Backup Data
  • dmp Steam Client Dump Data
  • gcf Steam Game Cache File

.adf - ReliaSoft ALTA Data

The ADF data files are related to ReliaSoft ALTA. The ADF file is a ReliaSoft ALTA Data. Accelerated Life Testing (ALTA) software is an advanced module application available in ReliaSoft Weibull++ for accelerated test planning and quantitative accelerated life testing data analysis.

Application:ReliaSoft ALTA
Category:Data files
Magic:- / -

ReliaSoft ALTA Data related extensions:

  • cap Snoop Captured Data
  • khs Kwalitan History Data
  • piw PI ProcessBook Data
  • rtree General R-Tree Data
  • gpudb GASW GPUDB Database
  • ltl TwoTowers LTL Formula

Be careful.

It is important to understand that the .alt file extension is not limited to a particular set of applications. Other programs besides the intended ones can also use the .alt extension to create files. This includes potentially harmful programs or malware that may generate .alt files for various purposes. Be especially cautious with .alt files coming from untrusted or unknown sources.

Can't open a .alt file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize an extension, you receive the following message:

Select an app to open this .alt file

To set the .alt file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. Under the Default apps section, you will find various categories such as Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate, such as Photos for image files or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the desired app is not listed, click on More apps to see additional options or click on Look for an app in the Microsoft Store to search for apps in the Store.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set .alt file association. Many applications can open .alt files without requiring any specific file association to be set.

The .alt file extension is often given incorrectly

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. Our goal in providing this list is to help users find the right information more easily and enhance their overall search experience on our website.

These misspellings were the most common in the past year:

ait, akt, al, alf, alg, alh, alr, aly, amt, aot, apt, at, atl, lat, lt

Is it possible that the filename extension is misspelled?

There is a possibility that the .alt filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .alt:

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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