Add your SBV file
Drop one or more .sbv 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.
SBV to TTML
Converting a .sbv file to .ttml 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 SBV 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 YouTube SBV subtitles to Timed Text Markup Language
Converting a .sbv file to .ttml extracts the document's content from its office package into a portable form. A .sbv file is a SubViewer-style caption document used by YouTube's caption editor: each cue is a single line of start,end timings followed by the caption text on the next lines, separated by a blank line. It carries the same timed dialogue as SubRip but divides the two timestamps with a comma instead of an arrow.
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. For this route the practical draw is a real published standard with formal profiles rather than a de facto convention and expresses styling, layout, and regions that plain caption formats cannot — balanced against far more verbose than SubRip or WebVTT for the same cues, which is worth knowing before you commit a large batch.
Why convert SBV to TTML?
The practical trigger for this conversion is usually a mismatch: with .sbv, almost no desktop or browser player plays .sbv directly, so conversion is usually required. Switching to .ttml buys you a real published standard with formal profiles rather than a de facto convention, which is why it is the better fit for delivering captions to broadcast and streaming platforms that mandate a TTML profile. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
SBV vs TTML at a glance
| Aspect | YouTube SBV subtitles (.sbv) | Timed Text Markup Language (.ttml) |
|---|---|---|
| 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 | each cue is a timing line H:MM:SS.mmm,H:MM:SS.mmm followed by one or more text lines and a blank separator | the root <tt> element declares the TTML namespace and optional ttp: parameters such as frameRate, tickRate, and timeBase |
| Strongest at | downloading and re-uploading captions through YouTube's caption editor | delivering captions to broadcast and streaming platforms that mandate a TTML profile |
| Weak spot | almost no desktop or browser player plays .sbv directly, so conversion is usually required | far more verbose than SubRip or WebVTT for the same cues |
Pick TTML as the output
Select .ttml in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if TTML 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 TTML file. Outputs keep the original filename with the .ttml extension.
SBV to TTML questions, answered
Will converting SBV to TTML lose quality?
There is no visual quality to lose — sbv is text-oriented and ttml 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 SBV files here?
Yes — the .sbv 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 TTML file work?
Broadcast and streaming toolchains — including the DFXP, SMPTE-TT, EBU-TT, and IMSC profiles — read and write TTML, and caption editors such as Subtitle Edit export it. Browsers do not. Novus Convert parses TTML locally with document types and external entities refused outright, resolves all five time-expression shapes, and converts to any of the twelve timed-text targets.
Will the TTML file be bigger or smaller than my SBV?
It depends on the content: the root <tt> element declares the TTML namespace and optional ttp: parameters such as frameRate, tickRate, and timeBase. Convert one representative file first and compare before batch-processing a large set.
Can I convert TTML back to SBV?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .sbv → .ttml → .sbv is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.