TTML to ASS Converter

TTML to ASS Converter

Paste your TTML subtitles or drag and drop a .ttml file, and instantly convert it to ASS subtitle file. This free browser-based tool transforms Timed Text Markup Language files into Advanced SubStation Alpha files for styled subtitles, karaoke effects, anime subtitles, and video production, with no upload, signup, or watermark.

Free to useNo signup required100% browser-based
TTML Input
ASS Output
ASS Output

Converted output will appear here

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Why Convert TTML to ASS?

TTML and ASS are both timed text formats, but they are optimized for different playback environments. Converting TTML to ASS helps you reuse the same timing data in styled subtitles, karaoke effects, anime subtitles, and video production.

Everything you need to convert TTML to ASS

A focused browser-based workflow for moving timed lyrics and subtitles from TTML into ASS without installing desktop software.

Switch direction instantly

Convert TTML to ASS, then switch back to ASS to TTML from the same tool.

Paste or upload

Paste timed text directly or drop a .ttml file into the browser-based converter.

Preview the result

Check the generated ASS output before copying or downloading the file.

Keep timing accurate

Preserve line timing with millisecond precision wherever the target format supports it.

Download ready-to-use output

Save the converted result as a .ass file for your player, editor, or publishing workflow.

Work locally in your browser

Process files on your device without uploading lyrics or subtitles to a server.

Step by step

How to Convert TTML to ASS

01

Paste or Upload TTML

Paste your TTML subtitles into the input box, or drag and drop a .ttml file.

02

Convert Instantly

The browser-based converter parses your timestamps and generates clean ASS output.

03

Copy or Download

Copy the converted text or download it as a .ass file.

Try It Now

TTML vs ASS Format Comparison

Timed Text Markup Language (.ttml)

  • XML-based timed text format
  • Used in broadcast and streaming delivery pipelines
  • Stores cues with begin and end attributes
  • Good for structured subtitle interchange
<?xml version="1.0" encoding="UTF-8"?>
<tt xmlns="http://www.w3.org/ns/ttml">
<body><div>
<p begin="00:00:12.500" end="00:00:16.800">First line of lyrics</p>
</div></body>
</tt>

Advanced SubStation Alpha (.ass)

  • Supports styling, positioning, and karaoke effects
  • Stores timed text in Dialogue events
  • Popular in advanced subtitle editing workflows
  • Can be simplified into cleaner subtitle formats when needed
[Script Info]
ScriptType: v4.00+
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:12.50,0:00:16.80,Default,,0,0,0,,First line of lyrics
Dialogue: 0,0:00:16.80,0:00:20.50,Default,,0,0,0,,Second line of lyrics

Tips for Best Results

  • 1
    Make sure your TTML timestamps are valid before converting.
  • 2
    Use UTF-8 text when working with multilingual lyrics or subtitles.
  • 3
    Review the output after conversion when moving from styled formats to simpler formats.
  • 4
    Test the downloaded .ass file in your target player or editor.
  • 5
    Keep subtitle lines concise for better readability on small screens.

Popular Use Cases

Video Publishing

Prepare ASS files for video platforms and editing tools.

Lyric Workflows

Reuse synced lyric timing across music, karaoke, and subtitle formats.

Format Migration

Keep a clean copy of timed text in the format your tools require.

FAQ

Common questions about converting TTML to ASS.

1

Is the TTML to ASS converter free?

Yes. The converter is free to use and does not require an account.

2

Are my files uploaded to a server?

No. Conversion happens locally in your browser, so your text does not leave your device.

3

Can I convert ASS back to TTML?

Yes. Use the direction switch at the top of the converter to convert ASS back to TTML.

4

Will styling be preserved?

Basic text and timing are preserved. Advanced styling may be simplified when converting into formats that do not support those features.

5

Is there a file size limit?

There is no server-side limit because the converter runs locally. Very large files are limited only by your browser memory.

Need AI-powered lyric syncing?

AI LRC Maker can generate synced lyrics from audio, fine-tune timestamps, and export LRC, SRT, WebVTT, ASS, TTML, and plain text.

Try AI LRC Generator
AI lyric transcriptionWord-level timing editorMultiple export formats