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Debug Properties Plus

A convenient UI and command to modify debug properties at runtime.

Fabric
Loaders
Fabric
Downloads on Modrinth
533
Followers on Modrinth
4
versions
5
Updated
September 15, 2026Sep 15
Published
in 2025
Changing debug properties — This mod allows changing debug properties on the fly. Here the PATHFINDING debug property is enabled which enables a debug renderer showing the paths mobs are taking. · swipe

At a glance

Runs on Fabric
For Minecraft 1.21.10–26.1, 26.3
Works on either side — install it in the game, on the server, or both
Latest version — 1.0.1+26.3-rc-3 from September 15, 2026
Requires Fabric API
License MIT — free
Where it's needed
In gameoptionalOn serveroptional

Works both in the game and on the server — install where you need it

Game versions1.21.10–26.1, 26.3

Debug Properties Plus

Debug properties exist for debugging purposes only. They might corrupt your world! Only use this mod if you know what you are doing.

This is a Minecraft fabric mod that adds a convenient UI to modify debug properties at runtime. The UI can be opened using F3+F7 (can be changed in controls) and using Mod Menu. This also allows changing debug properties of the server when the mod is also installed on the server and the player has OP permissions.

Additionally, adds a /debugproperties command to set properties on the server, even when the mod is not installed on the client.

Because debug properties are very diverse, the mod differentiates between different types:

Client properties:

These properties affect some behavior of the client. Those properties can be set globally and then affect all sessions and worlds

  • Some of these properties (mostly debug renderers) require the player to have OP permissions. A warning is shown when permissions are missing.
  • Some of these properties don't work at all in multiplayer. A warning is shown when on a server.

Global server properties:

These properties affect the behavior of the server. They are set globally and affect all worlds in singleplayer, but need to be set separately on a server. They require OP permissions to set on a server and can't be changed by visitors of a LAN sessions (as that would affect the properties of the host even in different worlds).

Per world properties:

Those are the most dangerous properties, as they affect the world directly (i.e. an inadvertently enabled property can cause lasting damage to a world). Therefore, they are set on a per-world basis and have to be enabled seperately for each world.

During world creation, there is an option to set those properties before the world is created. Default values can be set when opening the F3+F7 menu while in the main menu. To set on a server, they require OP permissions, but they can be set by visitors of LAN sessions.

Ineffective properties:

Some properties have no effect in vanilla and are therefore not handled at all.

FAQ

How to install Debug Properties Plus?

Install Fabric for your Minecraft version, download Debug Properties Plus 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 Debug Properties Plus support?

Debug Properties Plus has builds for Minecraft 1.21.10–26.1, 26.3.

Is Debug Properties Plus needed on the server?

Works on either side — install it in the game, on the server, or both

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

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