Convert LRC to TTML Online Free
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Converts to TTML on secure servers · first daily conversion free · no signup
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Convert LRC synced lyrics files to W3C TTML XML format for professional broadcast and streaming subtitle delivery. ChangeThisFile processes server-side with auto-deletion.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts LRC to TTML on a secure server. Upload your LRC lyrics file and it is converted to W3C TTML XML with proper namespace declarations and begin/end attributes. Files are auto-deleted after conversion. Free with no signup required.
LRC vs TTML: Format Comparison
Key differences between the two formats
| Feature | LRC | TTML |
|---|---|---|
| Structure | Plain text with bracketed timestamps | XML with namespace declarations |
| Primary use | Music player lyrics | Broadcast and streaming subtitle delivery |
| Styling | None | Full tts:* attribute-based styling |
| End times | Implicit | Explicit begin/end XML attributes |
| Broadcast compatibility | None | High — Netflix, Amazon, Disney+ |
| File size | Very compact | Larger due to XML overhead |
| Best for | Audio lyric apps | Professional video subtitle delivery |
When to Convert
Common scenarios where this conversion is useful
Submitting music video subtitles to streaming platforms
Streaming platforms like Netflix and Amazon require TTML for subtitle delivery. Converting LRC lyric files to TTML is the first step toward meeting professional delivery specifications for music video content.
Integrating lyrics into broadcast subtitle workflows
Broadcast productions featuring music content may need to deliver synced lyrics as TTML to subtitle management systems. LRC to TTML conversion bridges music metadata workflows with broadcast delivery.
Enabling MPEG-DASH subtitle delivery for music content
MPEG-DASH adaptive streaming supports TTML as a subtitle sidecar. Converting LRC to TTML enables lyric delivery alongside adaptive video streams for music content platforms.
Who Uses This Conversion
Tailored guidance for different workflows
Video Editors & Subtitlers
- Convert LRC caption files to TTML for the subtitle track your editor or delivery spec requires
- Move LRC subtitles into TTML to hand off to an editor working in a different tool
Content Creators & YouTubers
- Convert LRC captions to TTML to upload alongside your video on YouTube, Vimeo, or social platforms
- Turn a LRC caption file into TTML to make your video clearer and more accessible
Accessibility & Localization Teams
- Convert LRC subtitles to TTML to meet the caption format an accessibility or compliance spec requires
- Prepare LRC captions as TTML to hand to translators or a localization workflow
How to Convert LRC to TTML
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1
Upload your LRC file
Drag and drop your LRC lyrics file onto the converter, or click browse to select it. The file is uploaded over an encrypted connection.
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2
Server-side conversion
The server parses each LRC timestamp and lyric line, estimates end times, converts to TTML's HH:MM:SS.mmm format, and writes a well-formed TTML XML document.
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3
Download the TTML
Save your converted TTML file. The server copy is automatically deleted after processing.
Convert LRC to TTML via API
Integrate this conversion into your pipeline with 3 lines of code. Free tier: 25 conversions/month.
curl -X POST https://changethisfile.com/v1/convert \ -H "Authorization: Bearer YOUR_API_KEY" \ -F "file=@input.lrc" \ -F "target=ttml" \ -o output.ttml --fail
YOUR_API_KEY with your free key — no credit card needed.
Frequently Asked Questions
TTML (Timed Text Markup Language) is the W3C standard for professional subtitle interchange. It is used by Netflix, Amazon, Disney+, and broadcast networks for subtitle delivery and accessibility compliance.
The converter sets each cue's end time to the start of the next cue minus 100ms. The last cue gets a 3-second default duration. TTML requires explicit begin and end attributes on each p element.
Netflix (IMSC-1) and Amazon use strict TTML profiles with specific region, styling, and metadata requirements. The converter produces standard TTML that may need additional attributes to meet exact delivery specs.
Yes. The output conforms to W3C TTML 1.0 with standard tt, head, body, div, and p elements and xmlns namespace declarations.
Yes. Files are transferred over HTTPS and automatically deleted from the server after the TTML is ready for download.
LRC metadata tags (ti:, ar:, al:, by:) are included in the TTML head section as metadata elements where possible. They do not become subtitle cues.
LRC files are plain text and very compact. The 50 MB server limit is not a concern for any LRC file.
Yes. ChangeThisFile supports TTML to LRC conversion for round-tripping between formats.
Yes. The XML output can be validated with any XML parser. For TTML-specific validation, use the W3C TTML Checker tool.
Enhanced LRC word-level timestamps are stripped. The line-level timestamp is used as the TTML begin attribute, and the full line text appears as the p element content.
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