This mod reimplements those secret developer debug renderers that exist only in non-public builds of minecraft.
The default keybind is F4 (or shift F4 to go back) to cycle through debug renderers (the F3 menu must be open to see them)
The server must have the mod to use certain renderers (the ones labelled "DISABLED")
Pathfinder debug rendering is currently not implemented due to a crash that occurs when serializing Paths into packets
Probably useful for something.
Planned Features:
- Server-side configurability Added in 1.1.0
- Pathfinder rendering
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as Debug-1.1.0.jar — drop this file into the mods folder
- Download size: 93 KB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.