Convert ASS to VTT

Convert an Advanced SubStation Alpha .ass file to WebVTT .vtt, the caption format the web and HTML5 video use. ASS carries rich styling that WebVTT can't represent, so the timing and text come across cleanly and the ASS-only effects are dropped rather than mangled. It runs in your browser; nothing is uploaded.

Drop your .ass file here

or click to choose a file · or paste the text below

Rich styling to web captions

ASS (Advanced SubStation Alpha) is built for elaborate subtitles: fonts, colours, positioning, karaoke, and animated effects, all defined in a styles section and inline override tags. WebVTT is simpler and made for the web, so it can't hold most of that.

This converter reads the ASS dialogue, keeps the timing to the millisecond and the plain text, and writes a valid WebVTT file. Override tags and ASS-only effects are removed rather than left as broken markup, so the captions stay clean and playable. Convert to VTT when you need captions for an HTML5 <video> or a web player.

FAQ

What happens to the ASS styling and effects?

WebVTT can't represent ASS styling, positioning, karaoke, or animation, so those are dropped. The timing and the plain dialogue text are preserved exactly, and override tags are stripped so nothing shows up as stray codes.

Why convert ASS to VTT?

WebVTT is the caption format for HTML5 video and the web. If a player or platform wants .vtt and you have an .ass file, this gets you a clean, compatible caption track.

Is my file uploaded?

No. The conversion runs in your browser. Your file never leaves your device and no server is involved.