01
Protection Tab
Enable vanilla spoofing in the Protection tab so servers can't see the mods you have installed. One toggle, fully hidden.
Minecraft 26.2 · Fabric · Free & Open Source
OpSec
Mod 26.2
OpSec Mod 26.2 protects your privacy when you play on multiplayer servers. Hide your mods with vanilla spoofing, block forced resource packs, stop servers from tracking your account, and keep your keyboard and chat private — all from a simple in-game menu.
26.2
Latest Version
4+
Protection Layers
10+
Privacy Settings
Free
Open Source
What's Inside
Privacy Features
Every feature lives in one easy in-game menu. Open it up and explore — switch tabs and flip toggles to see how it works.
OpSec Mod
Deep Dive
How It Works
Built for operational security — control exactly what a server can and can't see.
02
Whitelist Controls
Decide which mods are allowed to talk to the server normally. Whitelist trusted mods and block everything else.
03
Chat Alerts
Watch for popup warnings the instant a server tries to track your activity or scan your clients.
04
In-Menu Controls
Find everything behind the OpSec button at the top of your multiplayer server list. Fast, clean, and easy to use.
Get Started
Download OpSec Mod 26.2
OpSec Mod 26.2 for Minecraft Fabric is the latest release and the version we recommend. It is free and open source.
OpSec Mod 26.2 for Fabric
Minecraft 26.2
Latest Release — Fabric 26.2
Download for Minecraft 26.2
The OpSec Mod 26.2 Fabric build brings the full privacy suite — hide your mods, block server packs, stop tracking, and account switching — to Minecraft 26.2 on the Fabric Loader. Install is unchanged: drop the jar into .minecraft/mods.
OpSec Mod 1.21.11
Minecraft 1.21.11
Legacy — Fabric 1.21.11
Download
Not on 26.2? Grab the legacy 1.21.11 build. Older versions live in the release archive.
Setup Guide
Installation
Up and running in under two minutes. No launchers, no accounts — just drop and play.
1
Install Fabric
Download and install the Fabric Loader for Minecraft 26.2, then launch the game once to generate the required folders.
2
Download OpSec 26.2
Download the OpSec Mod 26.2 .jar for Minecraft 26.2 from the downloads section above.
3
Drop in Mods
Move the .jar into your .minecraft/mods folder. Remove any older OpSec versions first.
4
Launch & Relax
Start Minecraft with the Fabric profile and join your server. Configure your protection from the OpSec menu whenever you need.
Questions
FAQ
OpSec Mod protects your privacy on multiplayer servers. It stops servers from tracking your account, checking your keyboard presses, or seeing what mods you have installed — and gives you tools to block unwanted data collection.
Use OpSec Mod 26.2 for Minecraft 26.2 — it is the current release and fully supported. A legacy 1.21.11 build is also available if your launcher is still on that version.
Open the OpSec menu (the OpSec button at the top of your multiplayer server list), go to the Protection tab, and turn on vanilla spoofing. Your game will look like plain, unmodded Minecraft to the server.
Use /opsec to list every command, /opsec info to see all the mods the game is watching, /opsec info [mod] for details on one mod, and /opsec channels to list hidden network paths your mods use.
Yes. If you change rules while playing on a server, leave and rejoin the server to make sure the new rules take effect properly.
OpSec Mod is free and open source. It never collects your personal data and only gives you the tools to protect your own privacy. See the terms and privacy policy for details.