Add your TTML file
Drop one or more .ttml files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
TTML to SRT
Converting a .ttml file to .srt extracts the document's content from its office package into a portable form. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop TTML files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Timed Text Markup Language to SubRip subtitles
Converting a .ttml file to .srt extracts the document's content from its office package into a portable form. A .ttml file is a Timed Text Markup Language document: an XML vocabulary in which each <p> element carries begin and end (or dur) attributes plus the caption text. It is the W3C standard that broadcast and streaming systems use as their interchange format for captions and subtitles.
A .srt file is a SubRip subtitle document: numbered cues with start and end timestamps and plain caption text. It is the most common caption sidecar for video players, editors, and streaming toolchains that need a simple, widely understood text format. For this route the practical draw is universally understood by media players and editors and human-editable in any text editor — balanced against no standard support for advanced styling, voices, or regions, which is worth knowing before you commit a large batch.
Why convert TTML to SRT?
The practical trigger for this conversion is usually a mismatch: with .ttml, far more verbose than SubRip or WebVTT for the same cues. Switching to .srt buys you universally understood by media players and editors, which is why it is the better fit for delivering captions alongside MP4 or MKV downloads. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
TTML vs SRT at a glance
| Aspect | Timed Text Markup Language (.ttml) | SubRip subtitles (.srt) |
|---|---|---|
| Format type | Text-based — characters and structure, so there is no visual quality loss | Text-based — characters and structure, so there is no visual quality loss |
| How it stores data | the root <tt> element declares the TTML namespace and optional ttp: parameters such as frameRate, tickRate, and timeBase | cues are blocks of an index, a timecode arrow line (HH:MM:SS,mmm --> HH:MM:SS,mmm), one or more text lines, and a blank separator |
| Strongest at | delivering captions to broadcast and streaming platforms that mandate a TTML profile | delivering captions alongside MP4 or MKV downloads |
| Weak spot | far more verbose than SubRip or WebVTT for the same cues | no standard support for advanced styling, voices, or regions |
Pick SRT as the output
Select .srt in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if SRT is selectable, the route is real and validated.
Convert on your device
Press Convert. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid SRT file. Outputs keep the original filename with the .srt extension.
TTML to SRT questions, answered
Will converting TTML to SRT lose quality?
There is no visual quality to lose — ttml is text-oriented and srt is text-oriented, so the question is structural fidelity. Text, ordering, and basic structure are preserved; complex layout, embedded objects, and styling beyond the target's model are simplified.
Is it private to convert TTML files here?
Yes — the .ttml file is processed inside your browser tab and never uploaded. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded. Close the tab and the file is gone from memory.
Where will the SRT file work?
VLC, MPC-HC, PotPlayer, Premiere, HandBrake, YouTube, and virtually every desktop player ingest .srt. Browser video elements usually prefer WebVTT, so conversion is common for web delivery.
Will the SRT file be bigger or smaller than my TTML?
It depends on the content: cues are blocks of an index, a timecode arrow line (HH:MM:SS,mmm --> HH:MM:SS,mmm), one or more text lines, and a blank separator. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my TTML file?
In .ttml, styling, layout, and region definitions are read past rather than applied: timing and text convert, presentation does not, and no external resource is ever fetched. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.
Can I convert SRT back to TTML?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .ttml → .srt → .ttml is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.