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Minecraft Bedrock Debugger
What it is
Minecraft Bedrock Debugger is a free, open-source Visual Studio Code extension for debugging JavaScript running in Minecraft Bedrock clients and Bedrock Dedicated Server. Developers can set breakpoints, step through code, inspect locals, and watch selected values. The extension 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. Minecraft 1.21.10 or later can provide server statistics for entities, chunks, memory, tick time, and network usage. Client diagnostics include FPS, memory, entity systems, and CPU profiling, but require the “Enabled client diagnostics” creator setting. Scripts can add custom live diagnostics through @minecraft/debug-utilities. TypeScript projects can configure source maps with sourceMapRoot and generatedSourceRoot. It connects through script debugger commands on port 19144 by default and is available for Windows through the Visual Studio Marketplace.
For and against
For
- Supports breakpoints and code stepping
- Includes locals and watches
- Runs Minecraft slash commands
- Provides script profiling
- Offers server and client diagnostics
Against
- Variable-state changes are unsupported
- Immediate mode is unsupported
- Server debugging is disabled by default
- Client diagnostics require a creator setting
The verdict
Minecraft Bedrock Debugger provides code inspection and performance tools inside Visual Studio Code. Its free, MIT-licensed project is aimed at Bedrock scripting workflows, with setup requirements for diagnostics and servers.
Who it suits
It is intended for developers building Minecraft Bedrock behavior packs and add-ons with JavaScript or TypeScript. It fits users working in Visual Studio Code on Windows.
Plans and prices
Minecraft Bedrock Debugger
VS Code extension · no price listed
Read 9 Oct 2026 · marketplace.visualstudio.com
On the record
- Breakpoints
- It supports setting breakpoints and stepping through code.github.com · read 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.github.com · read 4 Oct 2026
- Client diagnostics requirement
- Client-side performance data requires the “Enabled client diagnostics” creator setting to be enabled in Minecraft.github.com · read 9 Oct 2026
- Commands
- It can run Minecraft slash commands and offers shortcuts for favorite commands.github.com · read 4 Oct 2026
- Connection
- The debugger connects to Minecraft through script debugger commands and uses port 19144 by default.github.com · read 9 Oct 2026
- Custom diagnostics
- Minecraft scripts can push custom live diagnostics through the @minecraft/debug-utilities module.github.com · read 4 Oct 2026
- Custom diagnostics integration
- Minecraft scripting can push custom live diagnostics into the debugger using the @minecraft/debug-utilities module.github.com · read 9 Oct 2026
- Debugging features
- Supported features include breakpoints, stepping through code, the Locals pane, watches, performance diagnostics, and running Minecraft slash commands.github.com · read 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.github.com · read 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.github.com · read 4 Oct 2026
- Inspection
- It provides a Locals pane and watches.github.com · read 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.github.com · read 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.learn.microsoft.com · read 9 Oct 2026
- License
- The public GitHub repository lists an MIT license.github.com · read 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.github.com · read 9 Oct 2026
- Notable limits
- Changing variable state and immediate mode are listed as unsupported scenarios.github.com · read 4 Oct 2026
- Performance tools
- It includes performance diagnostics and a script profiler that saves captures to a locally configured path.github.com · read 4 Oct 2026
- Profiler
- The extension includes a script profiler that saves performance captures of a running add-on to a configured local path.github.com · read 9 Oct 2026
