How do I install Not a Bug?

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. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Not a Bug work with?

The listing gives Minecraft 1.21.11. This is the version stated by the author or source site, not something we verified ourselves.

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Not a Bug

Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.

by topsyy_yy · on Modrinth

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

Your game isn't broken. At random moments something goes wrong on purpose: inverted controls, a tilting camera, lightning next to you, a mob behind your back. 48 pranks, client-side, works on any server. Panic key: DEL.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.11
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.

File checked by MCModsHub

Ships as notabug-0.3.0.jar — drop this file into the mods folder
Download size: 155 KB
Download link checked 17 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21