The SSA extension is assigned to files used mainly by tools for creating subtitles for movies. SSA files are used to store dialogue lists for movies. In addition, these files may contain text formatting elements and simple graphic elements. The SSA format also allows you to create files for karaoke. SSA is a plain text file that can be opened in any editor, but for editing dialog lists it is convenient to use, for example, programs like Aegisub.

Sub Station Alpha is a format developed by CS Low / Kotus.