Anvil UI vs Minecraft Bedrock Debugger

Anvil UI is a web-based visual editor for Minecraft Bedrock JSON UI. It loads a resource pack’s JSON UI files, textures, namespaces, and dependencies so users can build interfaces on a canvas without writing JSON. Changes render instantly in a preview that reproduces anchors, nine-slice elements, fonts, and bindings. The editor supports panels, grids, sliders, scroll views, custom renderers, inheritance, interactive states, bindings, and Bedrock animations. Users can create Server Forms, Chest UIs, HUDs, or custom screens from a blank page or template, then save buttons, cards, and menus in a reusable library. The Free plan costs nothing, billed forever, with unlimited UI projects, the full visual editor, live Bedrock preview, and three cloud packs. Creator costs €12 a month, billed monthly, and adds JSON, PNG, and payload exports, full JSON code, premium updates, and up to 50 cloud packs. Founder's Lifetime costs €249, paid once, billed one time, with Creator features forever and up to 100 cloud packs.

Minecraft Bedrock Debugger is a free, open-source Visual Studio Code extension for developers building Minecraft Bedrock behavior packs and add-ons with JavaScript or TypeScript. It connects through script debugger commands, using port 19144 by default, and supports breakpoints, stepping, a Locals pane and watches. Developers can run Minecraft slash commands and keep shortcuts for favorite commands. Performance tools provide diagnostics and a script profiler that saves captures to a configured local path. Minecraft 1.21.10 or later can expose server statistics including entities, chunks, memory, tick time and network usage. Client diagnostics include FPS, memory, entity systems and CPU profiling, but require Minecraft’s “Enabled client diagnostics” creator setting. Scripts can add live diagnostics through the @minecraft/debug-utilities module. TypeScript projects can use source maps through sourceMapRoot and generatedSourceRoot. Dedicated Server debugging requires enabling inbound or outbound script-debugging settings in server.properties, which are disabled by default. Changing variable state and immediate mode are unsupported.