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Advanced SubStation Alpha subtitles
File type: Text file
Files with ass extension are in most cases movie (video) subtitles extension saved in Aegisub Advanced Substation. Playable in most media players nowadays.
Found 4 different file type records with the same ass filename suffix.
File type category:
Text file
Date updated: July 13, 2025
File extension ass is most likely best known for its use for Advanced SubStation Alpha subtitles files used for movies. SubStation Alpha (SSA) is an external subtitle file format that supports Text Formatting and Styling.
It has a lot of options including Karaoke, audio effects, graphic drawing etc. It is popular in the Anime scene and among Karaoke fans.
There were several versions. 1, 2, 3, 4 and 4+. The latter is better known Advanced SubStation (ASS). Only 4 and 4+ are still being used.
ASS subtitles are also popular for use with 3D movies after conversion to 3D format and playable with VLC. Very popular format for text subtitles is .srt, but ASS subtitles format has more advantages and options than SRT.
ASS subtitles may be opened or edited by any text editor. However, a much tter way is to use specialized subtitle editors like Subtitle Workshop. These files can also be loaded to most media players to enable the subtitles for currently played video.
Some specialized programs, like Subtitle Workshop are able to convert various subtitle formats between each other, change text code page encoding etc.
Software applications that can open ass files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software applications that can edit ass files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software capable of saving ass files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Apps designed for playing ass files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Apple iOS
Google Android
Software apps that create ass files:
Linux/Unix
Multiplatform
Software apps that convert ass files:
Linux/Unix
Multiplatform
On-line services
Software apps that import ass files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that export ass files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
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File type category:
Various data file
Date updated: July 23, 2019
The ass file extension is associated with the ASS I/O a programmers utility to pack multiple files into one file developed by Nullsoft.
The ass file contains data archive without compression. ASS I/O is obsolete product.
Use ASS I/O to open the *.ass extension files.
Probably cannot be converted to anything else.
File type category:
Source code and script file
Date updated: October 9, 2017
File extension ass is associated with the 68HC11 microcontroller developed by Motorola in 1985 now produced by Freescale Semiconductor. The 68HC11 is based on popular Motorola 6800 8-bit processor. Such .ass file contains source code in Assembling language for 68HC11.
Most likely used only in some old specialized devices based on Motorola processors.
No conversion for this type of .ass files is likely possible.
File type category:
Game file
Date updated: November 26, 2018
The ass file extension is associated with the Tom Clancy's Splinter Cell: Blacklist, an action adventure and tactical video game for Microsoft Windows operating system and video gaming consoles.
The ass file stores various game data.
You cannot open this file type manually, it is accessed by the game automatically.
These games files cannot be converted to anything else. However, sometimes modding.
Software applications that handle other tasks involving ass files:
Microsoft Windows
Language
