
auto-reg
Reg - a lightweight Fabric mod for auto-login and password management on auth servers. Free Minecraft Java mod for 1.21.1.
⬇ Download on ModrinthReg Lightweight client-side password manager and auto-login mod for Minecraft Fabric servers with auth plugins (AuthMe, LoginSecurity, etc.).
Features Password Generator: Create and save strong passwords with customizable length and quantity. Auto-Login: Detects chat prompts and automatically sends /login or /register. Per-Server & Per-Account Storage: Separate encrypted entries for each server IP and username. AES-256-GCM Encryption: Passwords stored locally in .minecraft/config/, encrypted using your OS username as a key seed. In-Game Config: Adjust button position and login delay via ModMenu. Custom UI: Clean, modern interface built with owo-lib.
How to Use Join a server with authentication. Open chat and click the 🔐 Passwords button. Generate or enter a password (IP and username fill automatically). Save. The mod handles future logins instantly.
⚠️ Security Note Passwords are encrypted at rest but tied to your local OS user account. They are not transferable between different Windows accounts or PCs.
- Ships as reg-1.0.0.jar — drop this file into the mods folder
- Download size: 146 KB
- Download link checked 3 Sept 2026 — working
These come from our own check of the pack file, not from the source page.