Convert ASS to VTT

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Your files never leave your browser. All processing is local.

About the Advanced SubStation Alpha (ASS) format

ASS is a rich subtitle format supporting fonts, colors, positioning, and karaoke effects. It is popular in the anime community and supported by players like VLC and mpv.

About the WebVTT (VTT) format

WebVTT is the W3C standard for subtitles on the web. It is required by the HTML5 <track> element and most embedded web players, and supports cue settings such as positioning and alignment.

FAQ

Is this converter really free? Yes. Single-file conversion under 1MB is free forever. Batch processing and large files require a one-time $9 Pro license.

Are my files uploaded anywhere? No. Conversion runs entirely in your browser using JavaScript — your subtitles never touch our servers.

Will timing be preserved? Yes. Timestamps are converted losslessly between formats (ASS uses centisecond precision, so timings are rounded down to 10ms precision when converting to ASS).