Convert CSV
to TTML
Drop in a .csv (Comma-separated values) file, get a clean .ttml (Timed Text Markup Language) back. Timed Text Markup Language is the W3C XML standard used by streaming platforms (Netflix, Disney+) and broadcast pipelines. The conversion runs entirely in your browser — your captions never leave the page.
Frequently asked
Why convert CSV to TTML?+
Comma-separated values is one row per cue with index, start, end, and text columns — opens in any spreadsheet. Timed Text Markup Language is built for delivery to streaming or OTT ingest. Converting lets you take a file produced for one workflow and use it in the other without re-typing or re-timing anything.
Is timing preserved exactly?+
Yes. The converter only re-encodes the file structure — start and end times round-trip to within one millisecond.
Does any styling survive the conversion?+
CSV doesn't carry styling, so the output TTML uses default formatting. Restyle in your editor after import.
Does this run on a server?+
No. The conversion is pure JavaScript running in your browser — files never upload anywhere. Works offline once the page is loaded.