This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
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Simon Willison
simonwillison.net
did:plc:kft6lu4trxowqmter2b6vg6z
In another case of it being quicker to build a tool than hunt around to find something that does what you need, here's a little vibe-coded thing for turning one or more GeoJSON shapes into a rendered PNG https://simonwillison.net/2026/Sep/1/geojson/
2026-09-02T00:34:12.100Z