Open ACF files

  • Full name
    Microsoft Agent HTTP Character Format
  • Developer
    Valve
  • Popularity
Have you encountered a problem with a ACF file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a ACF file here. In the further part of this page we have added a list of programs that should open your ACF file. It is enough you choose a proper application for your operating system, download and install it.

What is ACF file?

ACF files are so-called Adobe Photoshop Custom Filter files, so filter files for the image editing software Adobe Photoshop. When calling the Custom Filter via 'Filter-> Other Filter-> own filter', a matrix appears in which one can enter values for so-called weightings for scaling and offset.

More info

Using this matrix and the underlying mathematical functions, you can achieve many different effects, such as emboss, invert, or sharpen. If you have created a usable value matrix, you can also save it. The created ACF file can later be reloaded or used for batch processing.

Programs which can open a ACF file

How to open file with ACF extension?

In order to open a file with ACF extension one of the following programs must be installed on user’s system. If a problem with opening ACF file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with ACF files, follow the instructions below.
1
Install Steam or other program from the list

Most often resolving problems with opening ACF files is very simple. Just install an appropriate program that supports such files. All of the listed programs support ACF files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of ACF files or offer file conversion options, but may not be capable of editing such files.

Set Steam as the default program for opening ACF files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate ACF files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Steam applications is not on the list, select "Browse" option in order to manually locate the directory where Steam has been installed.

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Check the section that lists most common problems with ACF files

Sometimes problems with opening ACF files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • ACF files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open ACF files (should that be the case, please contact your system administrator or IT specialist)
  • ACF file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

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