Observed arrival · 2026-10-12
captions.js: one caption renderer, browser to FFmpeg
A JavaScript library for drawing word-level animated captions in browser video previews and rendering them into MP4s with FFmpeg.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- JavaScript developers building captioned video workflows
- Worth noticing
- The page lists 26 available presets and 14 more as coming soon; it says the upcoming styles are CSS sketches, not engine renders yet.
Field notes
The homepage presents styles as named presets, including Karaoke, Focus Box, Neon Pulse, and Midnight Serif, with calls such as `getPreset("Karaoke")`. It says the available previews are rendered by the engine itself, while the 14 upcoming styles are only CSS motion sketches so far. The page also points to guides for running Whisper-to-captions and FFmpeg in Node.js.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue