MechanismArticle
When Markdown contains an SVG block, the tool renders it as an interactive element accompanied by several tabs.
The tool transforms raw SVG blocks in Markdown into fully rendered SVGs with a tabbed interface. ✦ AI generated
Simon Willison · Simon Willison's Weblog · 2026-08-16 · original ↗
As you can see, that SVG block in the Markdown has been transformed into a rendered SVG (in this case animated) plus several tabs.
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Context · 4
The tool has evolved into the ideal solution for sharing Markdown transcripts that include SVG documents.Simon Willison · Simon Willison's Weblog · conf 85%Converting animated SVGs to MP4 enables easy sharing on platforms that lack native support for SVG animations.Simon Willison · Simon Willison's Weblog · conf 80%The PNG and JPEG tabs allow users to render the SVG to image formats and download them, enabling sharing on platforms that do not natively support SVG.Simon Willison · Simon Willison's Weblog · conf 80%The embedded code display shows line numbers but does not include syntax highlighting.Simon Willison · Simon Willison's Weblog · conf 60%
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provides context → The PNG and JPEG tabs allow users to render the SVG to image formats and download them, enabling sharing on platforms that do not natively support SVG.Simon Willison · Simon Willison's Weblogprovides context → The new MP4 tab analyzes animated SVGs, renders frames, and uses ffmpeg.wasm to compile them into a video file entirely within the browser.Simon Willison · Simon Willison's Weblogprovides context → Users can view rendered Markdown by navigating to the tool and pasting content directly, or by pasting a URL to a CORS-friendly document or Gist.Simon Willison · Simon Willison's Weblogprovides context → Converting animated SVGs to MP4 enables easy sharing on platforms that lack native support for SVG animations.Simon Willison · Simon Willison's Weblog