ModsJava
UsernameRegex
Uses regular expressions to determine if a player's username meets the requirements when they log into the server.
⬇ Download on ModrinthPlugin Description
Uses custom regular expressions to determine if a player's username meets the requirements when they log into the server.
Configuration File
# Presets
# Only allow English letters (uppercase and lowercase), numbers, and underscores: ^[a-zA-Z0-9_]+$
# Only allow Chinese characters: ^[\u4e00-\u9fa5]+$
# Allow Chinese characters, English letters (uppercase and lowercase), numbers, and underscores: ^[\u4e00-\u9fa5a-zA-Z0-9_]+$
# Only allow numbers: ^\d+$
# No restrictions: .*
usernameRegex: "^[a-zA-Z0-9_]+$"
kickMessage: "&cYour username contains disallowed characters. Please change it and try again."
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.12, 1.12.1, 1.12.2
- 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.
Verified by MCModsHub
- Ships as UsernameRegex.jar — drop this file into the mods folder
- Download size: 2 KB
- Download link checked 20 Aug 2026 — working
These come from our own check of the pack file, not from the source page.