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Video subtitles
File type: Text file
Files with sub extension are usually video subtitles in one of the most common subtitle format. It's a plain text file format that contain individual text entries with time stamps that basically tell the media player which text and at what playback time it should show.
Found 7 different file type records with the same sub filename suffix.
File type category:
Text file
Date updated: July 13, 2025
File extension sub is probably best known as one of the most common type of video subtitles, a textual versions of the dialog in movies, usually displayed at the bottom of the screen.
Many tools use .sub files for subtitles and you can find many variants based on which program was used to make them starting from the original MicroDVD, SubViewer to VobSub. But the core remains the same.
These can either be a form of written translation of a dialog in a foreign language, or a written rendering of the dialog in the same language, with or without added information to help viewers who are deaf and hard-of-hearing to follow the dialog.
SUB subtitle format is often used for subtitles for DivX movies, very popular on P2P servers (torrents).
A variant of sub format is sometimes labeled as VobSub, which you can identify by .idx file that is found together with the .sub file.
The .sub files can be edited by text editor or word processor.
Very useful for playing SUB subtitle file in the movie is VobSub DirectShow filter. VobSub is not related to any video player, VobSub runs, when the movie is played in any media player and VobSub shows the subtitles in the movie.
When the subtitles have the same name as the movie, VobSub opens the subtitles automatically, but when the subtitles haven't got the same name, you must open the subtitles in VobSub configuration menu manually.
Very useful conversion utility is distributed along with VobSub DirectShow filter. You can use this utility to open many subtitle formats and then saved them to another subtitle format.
Software applications that can open sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software applications that can edit sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software capable of saving sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Apps designed for playing sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software apps that create sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software apps that convert sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software apps that import sub files:
Apple macOS / Mac OS X
Software apps that export sub files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
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File type category:
Disk image (ISO) binary file
Date updated: October 10, 2018
Use CloneCD to work with *.sub files.
Probably cannot be converted to other formats.
File type category:
Various data file
Date updated: October 16, 2018
Record marked as obsolete and not updated for a long time.
The sub file extension is also used for component packages in IBM Rational Rose software.
The IBM Rational Rose platform is used to integrate legacy integrated development environments or languages.
Software applications that handle other tasks involving sub files:
Multiplatform
Rational Rose Developer for Java
File type category:
Settings, options, themes or skins file
Date updated: January 23, 2019
The sub file extension is associated with the Insight II, a scientific data analysis program for Microsoft Windows operating system, developed by Accelrys.
The sub file contains subset definition used by Insight II.
Use Insight II to work with *.sub files.
Probably cannot be converted to other formats.
Software applications that can open sub files:
Linux/Unix
Software apps that create sub files:
Linux/Unix
Software apps that manage or store settings in sub files:
Linux/Unix
File type category:
Various data file
Date updated: March 23, 2016
Record marked as obsolete and not updated for a long time.
The SUB file extension was also used in SubmitWolf program. SubmitWofl is an automated search engine submission software from Trellian as a saved website submission project.
These sub files can be opened only SubmitWolf. The software is obsolete and no longer supported.
Software applications that handle other tasks involving sub files:
Microsoft Windows
File type category:
Game file
Date updated: July 14, 2016
Record marked as obsolete and not updated for a long time.
The sub file extension is related to the SubTerra, a puzzle solving adventure computer game for Microsoft Windows and Linux operating systems.
The sub file stores level data for SubTerra.
File type category:
Various data file
Date updated: April 3, 2013
The SUB file extension is associated with the SWAT (Soil & Water Assessment Tool). File defines climatic inputs, tributary channel attributes, and the number and types of HRUs in the subbasin.
Software applications that handle other tasks involving sub files:
Microsoft Windows
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