Minecraft Bedrock Debugger
Minecraft Bedrock Debugger is a free, open-source Visual Studio Code extension for debugging JavaScript in Minecraft Bedrock clients and Bedrock Dedicated Se…
What Minecraft Bedrock Debugger is
Minecraft Bedrock Debugger is a free, open-source Visual Studio Code extension for debugging JavaScript in Minecraft Bedrock clients and Bedrock Dedicated Server. Developers can set breakpoints, step through code, inspect local variables, and watch selected values. The extension also runs Minecraft slash commands and provides shortcuts for favorite commands. Performance tools include diagnostics and a script profiler that saves captures to a configured local path. For Minecraft 1.21.10 or later, server statistics can include entities, chunks, memory, tick time, and network usage. Client performance data covers FPS, memory, entity systems, and CPU profiling, but requires Minecraft’s “Enabled client diagnostics” creator setting. Scripts can add custom live diagnostics through the @minecraft/debug-utilities module. TypeScript projects that generate JavaScript can configure source maps with sourceMapRoot and generatedSourceRoot. The debugger connects through script debugger commands and uses port 19144 by default. Bedrock Dedicated Server debugging requires changing server.properties to enable inbound or outbound script debugging, which is off by default. Changing variable state and immediate mode are unsupported. The extension is intended for developers building behavior packs and add-ons with JavaScript or TypeScript.
Good
- Free and open source.
- Supports breakpoints, stepping, locals, and watches.
- Includes a script profiler.
- Can display server performance statistics.
Watch out
- Changing variable state is unsupported.
- Immediate mode is unsupported.
- Client diagnostics require a Minecraft creator setting.
- Dedicated Server debugging is disabled by default.
Who it suits
It suits developers building Minecraft Bedrock behavior packs and add-ons with JavaScript or TypeScript. Users debugging a dedicated server must enable script debugging in server.properties.
Verdict
The extension provides code debugging, command shortcuts, and performance diagnostics for Bedrock development. Check its unsupported scenarios and setup requirements, particularly for client diagnostics and dedicated servers.
Plans and prices
From Minecraft Bedrock Debugger's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Minecraft Bedrock Debugger | Free | VS Code extension · no price listed |
The facts
Each one read from Minecraft Bedrock Debugger's own pages, with the date it was checked.
What it does
- Breakpoints
- It supports setting breakpoints and stepping through code.checked 4 Oct 2026
- Client diagnostics
- Client-side performance data includes FPS, memory, entity systems, and CPU profiling, and requires Minecraft’s “Enabled client diagnostics” creator setting.checked 4 Oct 2026
- Client diagnostics requirement
- Client-side performance data requires the “Enabled client diagnostics” creator setting to be enabled in Minecraft.checked 9 Oct 2026
- Commands
- It can run Minecraft slash commands and offers shortcuts for favorite commands.checked 4 Oct 2026
- Connection
- The debugger connects to Minecraft through script debugger commands and uses port 19144 by default.checked 9 Oct 2026
- Custom diagnostics
- Minecraft scripts can push custom live diagnostics through the @minecraft/debug-utilities module.checked 4 Oct 2026
- Custom diagnostics integration
- Minecraft scripting can push custom live diagnostics into the debugger using the @minecraft/debug-utilities module.checked 9 Oct 2026
- Debugging features
- Supported features include breakpoints, stepping through code, the Locals pane, watches, performance diagnostics, and running Minecraft slash commands.checked 9 Oct 2026
- Dedicated server settings
- Bedrock Dedicated Server debugging is disabled by default and requires changing server.properties settings to allow inbound or outbound script debugging.checked 9 Oct 2026
- Dedicated Server setup
- Bedrock Dedicated Server debugging requires enabling the relevant inbound or outbound script-debugging settings in server.properties, which default to false.checked 4 Oct 2026
- Inspection
- It provides a Locals pane and watches.checked 4 Oct 2026
- Installation and feedback
- The project directs users to install the extension from the Visual Studio Marketplace and submit feedback through GitHub issues.checked 4 Oct 2026
- Intended users
- The documentation presents the debugger as a tool for developers building Minecraft Bedrock behavior packs and add-ons with JavaScript or TypeScript.checked 9 Oct 2026
- License
- The public GitHub repository lists an MIT license.checked 9 Oct 2026
- Live diagnostics
- For Minecraft servers running version 1.21.10 or later, it can show statistics such as entity counts, memory usage, tick time, and network traffic.checked 9 Oct 2026
- Notable limits
- Changing variable state and immediate mode are listed as unsupported scenarios.checked 4 Oct 2026
- Performance tools
- It includes performance diagnostics and a script profiler that saves captures to a locally configured path.checked 4 Oct 2026
- Profiler
- The extension includes a script profiler that saves performance captures of a running add-on to a configured local path.checked 9 Oct 2026
- Purpose
- The Visual Studio Code extension helps debug JavaScript running in Minecraft Bedrock clients and Bedrock Dedicated Server.checked 9 Oct 2026
- Support
- The project asks users to send feedback by filing an issue in its GitHub repository.checked 9 Oct 2026
- TypeScript
- For TypeScript projects that generate JavaScript, the setup supports source maps through sourceMapRoot and generatedSourceRoot settings.checked 4 Oct 2026
- TypeScript support
- For TypeScript projects that generate JavaScript, the setup uses sourceMapRoot and generatedSourceRoot paths in launch.json.checked 9 Oct 2026
Where it runs
- Unsupported scenarios
- Changing variable state and immediate mode are listed as unsupported.checked 9 Oct 2026
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