Media lab

Image, video, audio and layered compositions — including browser export to PNG and WebM. Assets are same-origin or synthetic; nothing is fetched from another origin. Fictional Harbor Notes copy only.

Image

Responsive Image with a local SVG, blur-up placeholder, and a blocked javascript: source (URL policy).

Fishing boats in a harbor at sunset, fictional illustration

Video

Player chrome with inline WebVTT captions and chapters. The demo source is refused by the media URL policy so no remote media is requested; the poster is the local harbor SVG.

Video source blocked by URL policy.

Audio

Synthetic waveform peaks and a short blob WAV generated in the page (no network).

0:00 0:00

Composition and export

A validated composition (shapes and text only) previews on canvas. Export PNG, SVG, or WebM entirely in the browser — nothing is uploaded. WebM records the 2 s OKLCH color animation of the orb.

Middle frame preview

Loading composition…

Unsafe image layer

An image with a javascript: source is refused; exports explain why.