Convert VTT
to JSON
Drop in a .vtt (WebVTT) file, get a clean .json (JSON cue array) back. JSON cue array is a structured array of `{ index, start, end, text }` objects — clean for any captions pipeline. The conversion runs entirely in your browser — your captions never leave the page.
Frequently asked
Why convert VTT to JSON?+
WebVTT is the W3C web standard for HTML5 <track> captions, with cue settings and basic styling. JSON cue array is built for feeding captions into a script, web app, or LLM. 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?+
Most styling drops in this direction. VTT supports inline styling and JSON doesn't, so override codes, cue tags, and positioning attributes are stripped. Timing and text always survive.
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.