JSST v2.1.1+1.21.5 is a release file of the Minecraft mod Jack's Server Side Tweaks for Fabric, made for Minecraft 1.21.5. It was published on March 27, 2025 and is 3.6 MB in size. For the full description, screenshots and every other version, visit the Jack's Server Side Tweaks mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
