SRT → TTML

Convert SRT to TTML

Free in-browser converter from SubRip Subtitle (SRT) to Timed Text Markup Language (TTML / DFXP). No signup, no upload — runs entirely on your device.

Nothing is uploaded
Timestamps preserved
No account needed

Convert TTML to SRT instead

Paste or open your SRT

2 cues in

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>
      <p begin="00:00:18.920" end="00:00:24.500" xml:id="s2">Second line</p>
    </div>
  </body>
</tt>

2 cues out · 491 B

How this converter behaves

100% in your browser

We never see your file. Conversion runs as JavaScript in the page you're reading.

Round-trip safe

Convert SRT → TTML → SRT and you should get the same content back, line-for-line.

Spec-compliant output

TTML files validate against the TTML reference parsers.

Bidirectional

Reverse direction (TTML → SRT) is one click away — no need to bookmark a different page.

About these formats

SRT

SRT was created for the SubRip ripper utility and is now the lingua franca of subtitling: every video player, every YouTube uploader, every editing suite reads it. Each cue is a numbered block of plain text bracketed by a start→end timestamp written as `HH:MM:SS,mmm`. Styling is generally limited to a few HTML-style tags (<i>, <b>, <font>).

Full SRT guide →

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 Edit and FAB.

Full TTML guide →

What survives the conversion

Questions

How do I convert SRT to TTML?

Paste your SRT into the input box, or open a file from your device. The converter runs in your browser and produces TTML instantly. Click Download to save it.

Is this free?

Yes — no signup, no credits, no upload. Conversion happens entirely on your device, so the file never leaves your browser.

Are timestamps preserved?

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

What if my SRT has styling or positioning?

Only what both formats can express survives a conversion. TTML keeps the timings and the text; formatting that TTML has no equivalent for is dropped rather than approximated.

Other conversions

SRT → LRC SRT → VTT SRT → ASS TTML → SRT