Convert ASS Subtitles to SUB_SUBVIEWER Format
or drag and drop
About ASS
Advanced SubStation Alpha (ASS) is a powerful subtitle format that offers a vast range of customization options, far beyond SRT or VTT. It is the format of choice for 'fansubbing' communities, particularly for anime, as it allows for precise control over text styling, screen positioning, animated effects (like karaoke-style text), and overlapping dialogue. It is script-based and highly flexible.
About SUB_SUBVIEWER
SubViewer (.sub) is one of the earliest popular subtitle formats. It is a simple, time-based text format. There have been two major versions, SubViewer 1.0 and 2.0. Version 2.0, which is more common, uses a '[region]' section to define metadata and then lists subtitles with timestamps. Its simplicity led to wide support, but it lacks any styling features.
ASS vs SUB_SUBVIEWER
| Feature | ASS | SUB_SUBVIEWER |
|---|---|---|
| Styling Support | true | false |
| Positioning Support | true | false |
| Animation Support | true | false |
| Learning Curve | advanced | beginner |
| Quality Rating | 5 | 3 |
| Patent Status | open format | freeware |
| Year Introduced | 2005 | 1999 |
Frequently Asked Questions
Why is ASS so popular for anime?
Anime often requires creative subtitling to handle on-screen text, signs, and multiple speakers. ASS allows subtitlers to create highly stylized and positioned text that can match the visual style of the animation, which is not possible with simpler formats.
Will an ASS file work in any media player?
No, support for the full range of ASS features is limited to specific media players like VLC or MPC-HC with the appropriate renderer. While some players may display the basic text and timing, they will likely ignore all the advanced styling and positioning information.
My .sub file doesn't work. Why?
The '.sub' file extension is very generic and is used by several completely different and incompatible subtitle formats, including the text-based SubViewer and the image-based VobSub (for DVDs). If your file isn't working, it's likely because your player is expecting a different '.sub' format. Our converter can intelligently distinguish between them.
Is SubViewer still a good format to use?
For new projects, SRT is a much better choice. It's just as simple but has even wider and more reliable support across all modern platforms and players. SubViewer is mostly relevant for compatibility with older files.
Transform Your Videos with AI Subtitles & Closed Captions
Get started with 10 minutes of free transcription. No credit card required.