As both .sub and .ass files are movie subtitles files and as such can be converted from sub to ass another and vice versa. This can be usually achieved using some dedicated subtitles editors, including those listed below. It's worth mentioning that some simple changes can be also done using a text editor, no sub to ass conversion for this purpose is required.
Home > Search converters: sub to ass
Conversion of sub file format to ass file format beta
Search for sub to ass converter or software able to handle these file types.
Convert Video subtitles to Advanced SubStation Alpha subtitles.
We have found 8 software records in our database eligible for .sub to .ass file format conversion.
Microsoft Windows software 
- convert sub to ass on Windows
Subtitle Workshop
A free subtitle editor
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from sub file | No | Yes | Yes | sub editor | No | No | No | No |
to ass file | No | Yes | Yes | ass editor | No | No | No | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sub to ass. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Subtitle Edit
An open source video subtitle editor
Apple macOS / Mac OS X software 
- convert sub to ass on OS X
Bistec
A subtitle editor for OS X (macOS)
Jubler subtitle editor
A program for editing of text subtitles for videos
Linux/Unix software 
- convert sub to ass on Linux
Gnome Subtitles
A subtitle editor for GNOME
Multiplatform software 
- convert sub to ass on any platform
Aegisub
A tool for creating and modifying subtitles
URUworks Subtitle Workshop
An older freeware subtilte editing application
TeroSubtitler
An open source, cross-platform, and free subtitle editing software
Additional links: Open sub file, Open ass file
SUB
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.
ASS
Files with ass extension are in most cases movie (video) subtitles extension saved in Aegisub Advanced Substation. Playable in most media players nowadays.
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