
SeamlessLogin
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on Modrinth



Tired of typing your password every time you join an offline-mode server? SeamlessLogin detects the login prompt in chat and sends your password automatically — no commands, no copy-pasting.
Features
🔐 Password Manager
Store a password for each server you play on. Open the manager from the multiplayer screen or with a keybind (default: Numpad +). Each entry has a name, server address, password, and a per-entry auto-login toggle.
⚡ Auto-Login
When you join a server with a saved password and auto-login enabled, SeamlessLogin watches the chat for a login prompt and responds automatically. No input required.
🎲 Password Generator
Generate strong passwords without leaving the game.
- Password mode — configurable length (8–64), optional capitals, numbers, and special characters
- Passphrase mode — XKCD-style phrases from a built-in word list, configurable word count (3–8)
🛡️ Security
- Passwords are encrypted with AES-256-GCM before being written to disk
- Password reuse detection — warns you when the same password is used across multiple servers
- Show/hide toggle and clipboard copy for safe password handling
⚙️ Fully Configurable
- Edit login detection patterns (regex) to match any server's prompt format
- All settings accessible from the in-game mod config screen
- Auto-login can be disabled per entry or globally
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.8
- 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.
- Ships as seamlesslogin-1.0.1.jar — drop this file into the mods folder
- Download size: 74 KB
- Download link checked 2 Oct 2026 — working
These come from our own check of the pack file, not from the source page.