.CST File Extension

Adobe Systems
File Type:
Director External Cast File

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

What is a CST file?

Cst file extension has Director External Cast file type, developed by Adobe Systems, which is associated with the "video files" category.

Commonly generated with Adobe Director, the file specifies properties for the video output. The file may store both internal casts, which can’t be delinked from the movie and external casts that can be easily delinked from the movie. 


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

cst file icon
Adobe Systems
File Type:
Director External Cast File
Video Files

How to open CST file?

Double click the cst 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 .cst 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 cst 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 cst 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 CST 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 cst file as well. Download Universal File Viewer for your OS.

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