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Subtitles

The Subtitles tab manages word-timed captions with live preview on the stage — the same subtitle system the API renders.

The subtitle panel with the demo project's captions
The subtitle panel with the demo project's captions

Getting captions in​

  • Import a file — SRT, VTT, ASS, or Whisper JSON. Word timings are parsed or distributed automatically.
  • Load from URL — set a caption file src resolved at render time.
  • Add at playhead — write captions by hand as you scrub.

Editing​

  • Per-caption start / end / text fields, plus a word-level timing editor (text, start, end per word) for transcript-accurate karaoke.
  • Split a caption at its midpoint, merge with next, delete.
  • Even retime — redistribute word timings proportionally after edits.
  • Max words per line — split long captions automatically, like Shotstack/Creatomate.

Styling & animation​

Choose one of the 12 animation modes and watch it play on the stage — per-word color, scale, and fill effects update live:

bounce
fade
fill
highlight
karaoke
normal
one-word
pop
progressive
slide
typewriter

Styling covers font (searchable Google Fonts), size, colors, active-word color/background, bold/italic, caption background (color, padding, radius), outline, 8 position anchors, margins, and text transform.

Everything maps 1:1 to the JSON subtitle object, so a look you build here works verbatim through the API.