Convert TTML and DFXP to SRT online and use streaming captions in any editor or player. Upload files up to 20GB and download the converted result in a few clicks.
Drag & Drop your TTML file here
TTML files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
Link
20GB upload limit.
4.8/5
Trusted for 1,827,796+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your TTML file
Drag and drop a .ttml file, including DFXP, EBU-TT-D and IMSC captions, or select it from your device.
02
Convert to SRT
Keep SRT as the output format and start. Clock times, frames, ticks and offsets are converted, and nested <div> offsets and par/seq timing are applied.
03
Download the SRT
Download a UTF-8 .srt file that plays in VLC, on TVs and in video editors.
TTML
TTML (Timed Text Markup Language) is the W3C XML format for captions. Its profiles, including DFXP, SMPTE-TT, EBU-TT-D and IMSC, are used for streaming and broadcast deliveries, and Apple Music uses TTML for synced lyrics.
SRT
SRT (SubRip) is the most widely supported subtitle format: a plain-text list of numbered subtitles, each with a start and end time. VLC, smart TVs, video editors and YouTube read it, and it supports only simple tags such as bold, italic and underline.
FILE FORMATS
SOURCE
Timed Text Markup Language is the W3C's XML caption format, also known as DFXP. Streaming services, broadcasters (EBU-TT-D), SMPTE-TT and IMSC profiles and Apple Music lyrics all build on it. TTML supports styling, regions and several ways of writing times, which makes it powerful but hard for editors and TVs to read.
TARGET
SubRip Text began with the SubRip ripping tool in the early 2000s. Each subtitle is a number, a start and end time with a comma before the milliseconds, and one or more lines of text. Premiere Pro, DaVinci Resolve, VLC, smart TVs, YouTube, Facebook and LinkedIn all accept SRT.
| Feature | TTML | SRT |
|---|---|---|
| Developed by | W3C | SubRip (community) |
| File extension | .ttml, .dfxp | .srt |
| Styling | XML styles | Basic bold, italic, underline |
| Positioning | Yes, regions | No (some players read {\an8}) |
| Best for | Streaming and broadcast captions | Editors, TVs, uploads |
| Works in | Streaming and broadcast tools | Almost every player and site |
USE CASES
Practical workflows where TTML to SRT conversion is useful.
Use streaming captions with a video file
Captions delivered as TTML or DFXP become an SRT that VLC or a TV player shows next to the video.
Review a broadcast subtitle delivery
Editors and QC staff receiving EBU-TT-D or IMSC files get every caption with its start and end time in plain text, which is far easier to read than XML.
Make a lyric video from Apple Music lyrics
An Apple Music or iTunes lyrics TTML becomes an SRT with one subtitle per lyric line, ready for a lyric video.
Import captions into a video editor
Editors cutting promos from broadcast material can import the captions as SRT into Premiere Pro or DaVinci Resolve.
Re-post a video on social platforms
Facebook and LinkedIn take SRT caption files. Convert the TTML that came with the video before you upload.
Translate captions without the markup
Translators get readable SRT text instead of XML tags, styles and regions.
Archive captions next to recordings
Archivists keeping recorded broadcasts can store a plain-text SRT with each recording, timed to the millisecond.
Convert captions from an older web player
DFXP files from older web video players, including the 2006 DFXP namespace, are read and converted.
Check captions timed in frames or ticks
Files timed in frames, such as 29.97 fps, or in ticks, such as a 10 MHz tick rate, become exact SRT times you can check against the video.
Keep word-by-word captions in order
Captions that reveal one word at a time in a TTML player keep that reveal in the SRT, as a sequence of subtitles.
SUPPORTED FILES
TTML and DFXP files from streaming and broadcast sources are supported.
TTML and DFXP downloads.
EBU-TT-D, SMPTE-TT and IMSC text profiles.
Files using the 2006 namespace or tt: prefixes.
Line-timed and word-timed lyrics.
Both encodings are read.
TROUBLESHOOTING
Most issues come from features one format has and the other doesn't.
01
SRT has no regions or styling, so TTML layout is removed.
02
TTML can time captions by frames, ticks or clock time. All are converted, but check the video's frame rate if captions seem early or late.
03
IMSC image profiles hold pictures of text, which would need OCR.
04
Subtitle files over 50 MB are refused. Real subtitle files are far smaller.
05
The encoding is detected automatically. A very short file whose only accented letters fit several code pages can be misread; re-save it as UTF-8 and convert again.
06
Video files, picture-based subtitles and other binary files renamed as subtitles are refused with a message saying what they are.
Subtitle Edit and Aegisub are full subtitle editors. dragdropdo is built for converting TTML to SRT quickly, from any device.
| What matters | dragdropdo | Subtitle Edit and Aegisub |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes, a desktop download. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~No. Windows, Mac and Linux only. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Subtitle Edit has a batch converter; Aegisub doesn't. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Free. |
| Editing timing and text | ✓Not in the converter. Edit the SRT afterwards if needed. | ~Yes. Full timing and text editing. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
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WHY DRAGDROPDO
Convert TTML to SRT in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
FAQ
Answers to common questions about dragdropdo's TTML to SRT converter.
