Preventer 1.2.3-beta2 for 1.21.9-10 is a beta file of the Minecraft mod Preventer for Fabric, made for Minecraft 1.21.9. It was published on October 3, 2025 and is 0.1 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Preventer mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
