1. SUB File Extension
2. What is a(n) SUB file?
3. How to open SUB file?

3.1 Download and install application that supports SUB files
1. 3.1.1 Programs that support SUB files
3.2 Verify whether SUB files are associated with appropriate software
3.3 Check SUB file for other errors

4. Similar file extensions

SUB File Extension

File type Subtitle Format
File developer N/A
File category Text Files
File popularity rating

What is a(n) SUB file?

SUB files are text-based subtitle files. They are commonly used to provide closed-captioning for movies and other types of videos. SUB files include the timing information for each line of dialogue or caption, as well as text for the subtitles themselves.

SUB files are supported by many video players and subtitle editing programs. They can be saved in a number of different formats, including plain text, UTF-8, and ANSI. The encoding of the file must match the encoding used by the video player in order for the subtitles to display correctly.

How to open SUB file?

If given user account does not have necessary permissions to open files with SUB extension, it is highly probable that no program that supports given files is installed on the users’ system. Below is a list of actions user should pursue in order to resolve most common problems.

Step 1. Download and install application that supports SUB files

After the application has been installed, the system should automatically open SUB files with given application. Below is the list of relevant programs along with operating systems they are available for:

Programs that support SUB files

Windows

MAC OS

Linux

Step 2. Verify whether SUB files are associated with appropriate software

It is possible that an application that supports SUB files is not associated with such files. In such case, the program should by manually associated with SUB files (right-click on the file icon → Properties → General Tab → In submenu "Open with" and click on "Change" button. System will display a list of suggested programs that support SUB files. Choose the application by checking the box "Always use the selected application to open this kind of files". System will store this information in its registry and use it to open SUB files with the selected program.

Changing SUB file association in registry

File association for SUB files can be edited manually by editing appropriate entry in Windows System Registry. However, it is discouraged as it may introduce errors to registry if not done properly and may even damage the system.

Step 3. Check SUB file for other errors

SUB file was not copied properly from storage medium.
Antivirus application prevents opening SUB files. In that case it is recommended to exercise extreme caution and recover or delete infected SUB file. It is also advised to scan the entire system for malicious software and viruses with antivirus software.
For SUB files downloaded from the internet it is advised to check if the file has been downloaded completely and is not corrupted. If not, the file should be re-downloaded.

Similar file extensions

Submit File

I cannot open a SUB file. What should I do? Help!