alphabetical list of extensions

File extension .ALF

File description

ALF file is associated with ACT! Software. This is a customer relationship management application.

The lookup information required by the software is stored in ALF file format. In order to backup, restore and navigate through the ACT database, ALF file is required. Whenever ACT! Database is created, ALF file is also created which contains reference information of database for CRM data which is stored in various ADF files. In order to search through the database, ALF file is required which contains information about the structure of the database and this it helps in navigating and searching for the specific data.

Description of the problem
If you have on your computer a .ALF file that you cannot open, you are in exactly the same situation as thousands of other people who have similar problems with this or any other unknown file.

There may be several reasons why you cannot open the file with .ALF extension. Directly on this website you can find a solution of the most common problem with the .ALF file – that you do not have on your computer the appropriate program to open the file.
From the list below, select the appropriate program, install it and double click on the icon of a file that did not want to open - the problem with the .ALF file extension should be solved. However, if this does not happen, go back to the website to learn about other possible causes of the error, which have been described at the bottom of the website.
Database Files
The Sage Group
Last updated
July 15, 2014
File name: ACT! Lookup File
Programs that will open this file:
Sage ACT Sage ACT
The .ALF file extension can correspond to several not related file formats. If there is more than one file format with the .ALF extension, you will probably find most of them at this website. Remember that you need to download a program to support a particular file type. So first look through the entire contents of the website to select a program to support just the file you have.

Other possible reasons why your .ALF file does not want to open

In addition to the problem described above, i.e. the lack of the appropriate application to support the .ALF file, there may be several reasons that cause problems with opening and operation of the data format:

1. Incorrect version of the installed application

A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .ALF file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .ALF file, so download the update and check again.

2. Incorrect .ALF file association with the program

If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:

  • Right-click the .ALF file
  • Go to the "Open with" - then "Choose default program ..."
  • Locate the appropriate application
  • Click "OK"

3. The file is corrupt

It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.