Free online TTML to SSA converter
Convert TTML captions to SSA subtitles with timing and styling support.
Convert TTML to SSA online - free
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How to convert ttml to ssa file
- Video subtitles
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TTML (Timed Text Markup Language) is an XML-based subtitle and caption format used for timed text in media workflows. SSA (Sub Station Alpha) is a subtitle format known for rich styling, positioning, and compatibility with many video players and editors. Converting TTML to SSA is useful when you need to move captions from broadcast or streaming systems into a subtitle format that supports advanced appearance control.
Why convert ttml to ssa
TTML is widely used for standards-based captions, while SSA is often preferred for fan subtitles, video editing, and playback environments that support styled subtitles. The conversion helps preserve timing and, when possible, styling such as font changes, colors, and placement.
How the conversion works
During conversion, the tool reads TTML timing, subtitle text, and styling information, then maps it into SSA events and formatting tags. Because the two formats differ in structure, some TTML features may not translate perfectly, especially complex layout rules, region definitions, or advanced XML styling.
Best software for ttml to ssa conversion
Aegisub is one of the best tools for working with SSA subtitles. It is excellent for editing, timing, and styling subtitles after conversion. For direct format conversion, Subtitle Edit is often the most practical choice because it supports many subtitle formats and can import TTML and export SSA in a straightforward workflow.
Recommended conversion steps
- Open the TTML file in Subtitle Edit or another subtitle converter.
- Check that the subtitle timing and encoding are detected correctly.
- Review styling and line breaks before export.
- Choose File → Save as or File → Export and select SSA as the output format.
- Open the resulting SSA file in Aegisub if you want to fine-tune appearance or timing.
Things to watch for
- Styling loss: Some TTML formatting may not have a direct SSA equivalent.
- Region mapping: TTML positioning rules may need manual adjustment in SSA.
- Character encoding: Make sure special characters are preserved correctly.
- Timing accuracy: Always preview the converted subtitles in a player or editor.
Online converter option
If you prefer a web-based solution, look for a subtitle converter that supports both TTML and SSA. Online tools are convenient for quick jobs, but desktop software is usually better for privacy, batch conversion, and styling control.
Conclusion
TTML to SSA conversion is best handled with subtitle software that can preserve timing and allow manual cleanup afterward. For most users, Subtitle Edit is the best converter for the initial conversion, and Aegisub is ideal for final subtitle refinement.
Note: This ttml to ssa conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
TTML vs SSA: format comparison
How the TTML and SSA formats compare on the properties that matter most for this conversion.
| Property | .TTML Timed Text Markup Language | .SSA Sub Station Alpha subtitle file |
|---|---|---|
| Text styling | Extensive | Extensive |
| On-screen positioning | Yes | Yes |
| Timing precision | Milliseconds | Centiseconds |
| Storage | Both | Embedded in the file |
| Player support | Limited | Wide |
| Plain-text readable | Yes | Yes |
| Typical file size | Medium | Small |
| Open standard | Yes | No |
| Introduced | 2006 | 1998 |
| Developer | World Wide Web Consortium (W3C) | Kedem, later associated with Sub Station Alpha / assorted subtitle tools |
| MIME type | application/ttml+xml | — |
Frequently asked questions
Is the TTML to SSA converter free?
Yes, converting TTML to SSA on 101convert.com is completely free. No registration, email address or installation is required.
How large can my TTML file be?
You can upload TTML files up to 100 MB and convert up to 100 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert TTML to SSA?
No. The TTML to SSA conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid TTML file for this TTML to SSA conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.