.ACT File Extension

Adobe Systems
File Type:
Adobe Color Table File

Having trouble opening .act extension? Don't panic! This page explains what act files are as well as suggests programs you may use to open act files. You can download these programs through this page.

What is an ACT file?

Act file extension has Adobe Color Table file type, developed by Adobe Systems, which is associated with the "settings files" category.

Typically associated with Adobe Photoshop, the file contains a range of various pre-defined colors. It may be used to applying a color look-up table (CLUT) to a picture within Photoshop.

CLUT files also come in use to optimize photos published on the web. User may check the image quality before saving it via configuring the amount of colors in the CLUT.

CLUTs may be saved within the “Save for Web” dialog box. They are usually supported by a number of image file formats within the dialog, like the .GIF format. However, they are not supported by .PNG or .JPG files.

To learn how you can open the given file, read the information below.

act file icon
Adobe Systems
File Type:
Adobe Color Table File
Settings Files

How to open ACT file?

Double click the act file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .act extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the act extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the act file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open ACT files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the act file as well. Download Universal File Viewer for your OS.

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