Convert Text to VTT

They are generated, not taken from any audio: each line gets the duration you set, laid end to end from zero. Predictable on purpose — a rule you can hold in your head is easy to correct for, a clever guess is not.

Yes. It opens with the WEBVTT header and puts a dot before the milliseconds — the two details browsers reject a file over.

They have to come from the audio. Upload the video to ScribeToAny and it transcribes and times the captions together, then exports VTT, SRT and six other formats.

Put one caption per line — each line becomes one cue — and add a blank line wherever you want a gap. Keep lines short enough to read on screen (roughly a phrase each), because the converter does not re-wrap your sentences; it takes the lines as you wrote them. Tidy the text first and the resulting cues need much less nudging afterwards.

Choose by where the captions are going. VTT is what HTML5 video needs in its <track> element, so pick it for captions on a web page. SRT is the broader interchange format most desktop players and subtitle editors prefer, so pick it if you will refine the file in an editor or feed it to a video app. The text-to-srt tool does the same job for that target; the cues and durations are otherwise identical.