scrolly

Compile a JSON5 deck into a single, self-contained, scrollable 2D-canvas HTML presentation.

Liked by humans; understood by agents.

Prefer to drive? The deck below is the real, interactive build — not a screenshot. Scroll inside it to fly around the canvas and animate the slides.

Open full deck ↗ View source ↗

Why it's different

• A 2D canvas you fly around, not a linear reel. Slides sit on an integer grid connected by edges; readers zoom out to a deck map and zoom into any slide to scroll through it.
• Scroll-driven keyframe animation. Element properties (position, size, opacity, scale, angle) interpolate as the reader scrolls — no timeline, no autoplay.
• One self-contained HTML file. A default build inlines every asset into a single index.html with zero external loads — open it by double-clicking, host it anywhere, email it.
• Agent-friendly. The CLI exposes full help, input schemas, deck introspection, and numbered error codes, so agentic coding tools immediately understand how to author and debug scrolly decks.

Quickstart

pip install scrolly          # or: uv tool install scrolly
scrolly build examples/stacked-diffs/deck.deck.json --out /tmp/scrolly-out --force
open /tmp/scrolly-out/index.html

See Getting started for the guided walkthrough, or Concepts for the mental model.