Vantage
Point Vantage at a Minecraft Java world save and it renders a fast 3D map you can open in a browser.
Vantage turns a Minecraft Java Edition world save into a 3D map for the browser. No mods, no plugins, no server: it reads the world files directly. I built it for players and server admins who want to see a world without launching the game, or share a spot by sending a link, since the camera lives in the URL.
It comes as a command-line tool, a desktop app, and an npm package. The CLI can render a world to files or serve a live map that updates as you play, with players shown on it from their last known positions.
The demo at vantage.beacon-mc.io runs on it. Vantage is free and open source under the MIT license, and it is the map that ships with Beacon.