DevMC

DevMC adds the dev tools to Minecraft: Java Edition, including entity tracking and access to a special mannequin or even able to debug the game using these commands, designed for testing, debugging, and experimentation.

99 Downloads

fabric

Rent Server with this Mod

About this Mod

A Fabric mod that enables or implements developer tools embedded in the base game. You can play around with these tools for fun or utilize them when developing your own mod.

Enables the following commands:

/debugpath
/debugmodspawning
/debug
/debugconfig
/warden_spawn_tracker
/raid
/test
and many more...
Enables the following F3 hotkeys:

F3-E
F3-L
F3-U
F3-V
F3-W
Reimplements debug renderers which can be enabled individually via a custom F3 hotkey: F3-F6

Available Versions

DevMC releasealpha

MC 1.21.11fabric

January 30, 2026

How to Install DevMC on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "DevMC". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

DevMC server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is DevMC compatible with fabric?

DevMC officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with DevMC – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if DevMC consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.