ASS to TTML Converter

ASS to TTML Converter

Paste your ASS subtitles or drag and drop a .ass file, and instantly convert it to TTML timed text file. This free browser-based tool transforms Advanced SubStation Alpha files into Timed Text Markup Language files for broadcast, OTT, streaming, and professional timed-text workflows, with no upload, signup, or watermark.

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

Converted output will appear here

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Why Convert ASS to TTML?

ASS and TTML are both timed text formats, but they are optimized for different playback environments. Converting ASS to TTML helps you reuse the same timing data in broadcast, OTT, streaming, and professional timed-text workflows.

Everything you need to convert ASS to TTML

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

Switch direction instantly

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

Paste or upload

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

Preview the result

Check the generated TTML 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 .ttml 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 ASS to TTML

01

Paste or Upload ASS

Paste your ASS subtitles into the input box, or drag and drop a .ass file.

02

Convert Instantly

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

03

Copy or Download

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

Try It Now

ASS vs TTML Format Comparison

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

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>

Tips for Best Results

  • 1
    Make sure your ASS 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 .ttml file in your target player or editor.
  • 5
    Keep subtitle lines concise for better readability on small screens.

Popular Use Cases

Video Publishing

Prepare TTML 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 ASS to TTML.

1

Is the ASS to TTML 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 TTML back to ASS?

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

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