AI Signal 551
Markdown SVG upgrades
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Simon Willison's markdown-svg-renderer tool now includes an MP4 export tab that converts animated SVGs to video using ffmpeg.wasm running entirely in the browser.
Sharing animated SVGs on platforms that don't support SVG natively has been a persistent friction point. This tool eliminates the need for external conversion software by handling the entire pipeline client-side. Engineers working with SVG animations in documentation or presentations get a browser-based path to shareable video output.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
The MP4 tab detects SVG animations, estimates loop duration, renders frames, and encodes them using ffmpeg.wasm in the browser.
PNG and JPEG tabs already existed for rasterizing static SVGs for platforms without native SVG support.
The tool accepts Markdown input directly or via a URL to a CORS-friendly source like a GitHub Gist.
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