
ModsJava
SimpleClientBlocker
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on Modrinth
Blocks specific Minecraft clients from joining your server.
Features
- Kicks players using specific clients from the server.
- Configurable blacklist or whitelist for allowed clients.
- Customizable kick message displayed when a player is kicked.
- Notifications for online players when someone is kicked for using a blocked client.
- Notifications for online players when a player successfully joins with an allowed client.
- Ability to check the client of a specific player using a command.
Commands
- Use /simpleclientblocker reload to reload the plugin.
- Use /simpleclientblocker about to get information about the plugin.
- Use /simpleclientblocker client to check the client of the specified player.
Permissions
- simpleclientblocker.admin.reload - Allows you to use /simpleclientblocker reload.
- simpleclientblocker.client - Allows you to use /simpleclientblocker client .
- simpleclientblocker.bypass - Allows players to bypass the client check.
- simpleclientblocker.notify - Allows players to receive notifications about player client checks.
# SimpleClientBlocker by Losterixx
# Version: 1.0.0 | MC-Version: 1.21.1
#
# Hint: To use HEX colors, write '&x&r&r&g&g&b&b' instead of '#rrggbb'.
prefix: "&8[&4SimpleClientBlocker&8] &7"
messages:
noPlayer: "&cOnly players can use this command!"
noPerms: "&cYou do not have permission to execute this command!"
# These clients will be kicked upon joining
list:
# BLACKLIST or WHITELIST
type: WHITELIST
# List of clients (only uppercases)
clients:
- FORGE
- FEATHER FABRIC
# The message players receive when kicked
# Use \n for a new line
kick-message: "&cThe client &e%client% &cis not allowed on this server!"
notify:
kicked:
enabled: true
message: "&7The player &e%player% &7attempted to join with &e%client% &7and was automatically kicked!"
joined:
enabled: true
message: "&7The player &e%player% &7joined using &e%client%&7!"
View messages.yml# SimpleClientBlocker by Losterixx
# Version: 1.0.0 | MC-Version: 1.21.1
#
# Hint: To use HEX colors, write '&x&r&r&g&g&b&b' instead of '#rrggbb'.
reload:
reloading: "&7SimpleClientBlocker &eis reloading&7..."
success: "&7SimpleClientBlocker has been &areloaded&7!"
error: "&cAn error occurred while reloading SimpleClientBlocker! Check the console for details."
simpleclientblocker:
usage: "&cPlease use &e/simpleclientblocker <about/reload/client/version> <player>&c!"
notFound: "&cPlayer &e%player% &cwas not found!"
client: "&7The player &e%player% &7is using &e%client%&7!"
version: "&7The player &e%player% &7is using &e%version%&7!"
Contact
If you encounter any issues or bugs, or have a request for a new feature, please contact me via Discord or join my Discord-Server.
My discord-name is Losterixx.
My Discord-Server: Link
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- 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 SimpleClientBlocker-1.0.0.jar — drop this file into the mods folder
- Download size: 13 KB
- Download link checked 16 Oct 2026 — working
These come from our own check of the pack file, not from the source page.