VTT to TTML Converter
Paste your WebVTT captions or drag and drop a .vtt file, and instantly convert it to TTML timed text file. This free browser-based tool transforms WebVTT files into Timed Text Markup Language files for broadcast, OTT, streaming, and professional timed-text workflows, with no upload, signup, or watermark.
Why Convert WebVTT to TTML?
WebVTT and TTML are both timed text formats, but they are optimized for different playback environments. Converting WebVTT to TTML helps you reuse the same timing data in broadcast, OTT, streaming, and professional timed-text workflows.
Everything you need to convert WebVTT to TTML
A focused browser-based workflow for moving timed lyrics and subtitles from WebVTT into TTML without installing desktop software.
Switch direction instantly
Convert WebVTT to TTML, then switch back to TTML to WebVTT from the same tool.
Paste or upload
Paste timed text directly or drop a .vtt 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 WebVTT to TTML
Paste or Upload WebVTT
Paste your WebVTT captions into the input box, or drag and drop a .vtt file.
Convert Instantly
The browser-based converter parses your timestamps and generates clean TTML output.
Copy or Download
Copy the converted text or download it as a .ttml file.
WebVTT vs TTML Format Comparison
WebVTT (.vtt)
- Native caption format for HTML5 video
- Uses WEBVTT headers and millisecond timestamps
- Supported by modern browsers and web players
- Useful for captions, subtitles, chapters, and metadata cues
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
Tips for Best Results
- 1Make sure your WebVTT timestamps are valid before converting.
- 2Use UTF-8 text when working with multilingual lyrics or subtitles.
- 3Review the output after conversion when moving from styled formats to simpler formats.
- 4Test the downloaded .ttml file in your target player or editor.
- 5Keep 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 WebVTT to TTML.
Is the VTT to TTML converter free?
Yes. The converter is free to use and does not require an account.
Are my files uploaded to a server?
No. Conversion happens locally in your browser, so your text does not leave your device.
Can I convert TTML back to WebVTT?
Yes. Use the direction switch at the top of the converter to convert TTML back to WebVTT.
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.
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.