How do I convert ASS to TTML?

Paste your ASS into the input box. The converter runs in your browser and produces TTML instantly. Click Download to save.

Yes — no signup, no credits, no upload. Conversion happens entirely on your device.

Are timestamps preserved?

Yes. Timestamps round-trip from ASS into TTML with millisecond precision.

ASS → TTML

Convert ASS to TTML

Free in-browser converter from Advanced SubStation Alpha (ASS / SSA) to Timed Text Markup Language (TTML / DFXP). No signup, no upload — runs entirely on your device.

Paste ASS

TTML output

<?xml version="1.0" encoding="UTF-8"?>
<tt xml:lang="en" xmlns="http://www.w3.org/ns/ttml" xmlns:tts="http://www.w3.org/ns/ttml#styling">
  <head>
    <styling>
      <style xml:id="defaultStyle" tts:color="white" tts:fontSize="100%" tts:textAlign="center"/>
    </styling>
  </head>
  <body>
    <div>
      <p begin="00:00:12.340" end="00:00:18.910" xml:id="s1">First subtitle line</p>
    </div>
  </body>
</tt>

About ASS

ASS (and its predecessor SSA) was designed for typesetting-quality subtitles in the anime fansub community. Each cue can specify font, size, primary/secondary/outline/shadow colours, alignment, layer, position, and per-syllable karaoke highlighting via {\k} tags. It is the only subtitle format that can express broadcast-grade typography and complex…

Full ASS guide →

About TTML

TTML is a W3C XML standard for timed text. It supports rich styling, regions, animations and accessibility metadata, and is the format Apple Music ships synchronised lyrics in (TTML 2 with Apple's iTunesTimedText profile). It also underpins SMPTE-TT for broadcast captions and is exported by professional subtitling suites such as EZTitles, Subtitle …

Full TTML guide →

Other conversions

ASS → LRC ASS → SRT ASS → VTT