CommandF3

A lightweight mod adding a /f3 command to toggle the debug screen, show hitboxes, and reload chunks. Perfect for macOS users!.

by sohaan.mGame mechanics Optimization Utility

Fabric

Loaders: Fabric
Downloads on Modrinth: 918
Followers on Modrinth: 1
versions: 2
Updated: June 2, 2026Jun 2
Published: in 2026

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At a glance

Runs on Fabric

For Minecraft 1.21.1–1.21.11

Client only — no need to install it on the server

Latest version — 1.1.0 from June 2, 2026

License MIT — free

Where it's needed

In gamerequiredOn servernot needed

Install in the game only; not needed on the server

Game versions1.21.1–1.21.11

CommandF3

A simple client-side mod that adds an /f3 command to the game.

I made this because playing Minecraft on a Mac or a compact keyboard means streaching your finger a killometer just to check coordinates. And the keybinds like Fn + F3 + B are annoying, and some keyboards don't even have a function row. This mod fixes that by moving those keys into your chat.

What it does:

/f3 – Toggles the full debug menu overlay.
/f3 hitboxes – Shows or hides entity hitbox borders.
/f3 reload – Forces a clean reload of all visible world chunks.

FAQ

How to install CommandF3?

Install Fabric for your Minecraft version, download CommandF3 for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does CommandF3 support?

CommandF3 has builds for Minecraft 1.21.1–1.21.11.

Is CommandF3 needed on the server?

Client only — no need to install it on the server

License and source

MIT Licensefree to use and share with credit to the author

Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders