Purpose-built for Roblox developers. Protect your LocalScripts, ServerScripts, and ModuleScripts with VM obfuscation that works natively, no loadstring, no exploits, no compatibility issues.
Joker protects Roblox scripts by compiling your Luau code into encrypted bytecode that runs inside a virtual machine, with no loadstring required, so it works in LocalScripts where Roblox disables loadstring. LocalScripts, ServerScripts, and ModuleScripts are all supported, the output is tested in Roblox Studio on real games, and every build is structurally unique.
Be clear about what you are defending against. Anything that runs on the client replicates to the client: exploit executors can dump every LocalScript and ModuleScript a player's device receives. ServerScripts never replicate, so players cannot dump them at all. And no obfuscator can stop an exploiter from watching your remotes fire or observing what your game does at runtime. What obfuscation can do is stop people from reading, editing, and reselling the code itself, which is where stolen scripts actually cost you.
The loadstring detail matters more than it sounds. Most Lua obfuscators emit output that must be loaded through loadstring, and Roblox disables loadstring in LocalScripts entirely, so those tools simply cannot protect client code. Joker's output is plain Luau-compatible source that runs natively in any script type. The workflow stays boring on purpose: paste your script into the dashboard, obfuscate, paste the output back into the same LocalScript, ServerScript, or ModuleScript in Studio, and hit play.
Luau syntax is handled automatically. Compound assignments like +=, continue, and type annotations are converted to the Lua 5.1 core before protection, and the result still runs unchanged on the Luau runtime. Every build is also structurally unique across four VM families, so a writeup that picks apart one protected script teaches an attacker almost nothing about your next build, or anyone else's.
Unlike other obfuscators, our output runs natively in Roblox without loadstring. Works in LocalScripts where loadstring is blocked.
Your script is compiled into encrypted bytecode executed inside a virtual machine. Decompilers see the VM, not your code.
Tested on Roblox Studio with real games, leaderstats, GUIs, sprint systems, cheat menus, combat systems all work perfectly.
Each obfuscation produces completely different output. Two copies of the same script look entirely different.
+=, continue, type annotations, and other Luau features are converted automatically before obfuscation. Paste Roblox code as-is.
Edited output silently produces wrong results instead of throwing errors, so tampering is hard to even diagnose.
Selling your system? Tie builds to keys and revoke a leaker's copy without touching paying customers.
The Roblox-specific things that actually matter when you protect a game.
| Typical tools | Joker | |
|---|---|---|
| Runs in LocalScripts | Often needs loadstring | No loadstring, runs natively |
| What a dumper recovers | Readable renamed source | VM bytecode, not your code |
| Studio compatibility | Hit or miss | Tested in Studio on real games |
| Luau syntax | Manual conversion | Auto-converted before build |
| Selling scripts | No access control | Optional keys, HWID, revoke a leaker |
| Per-build uniqueness | Same skeleton every build | 4 VM families, unique every build |
| Free tier | Free but renaming based | 300 free credits, full VM output |
| Honest threat model | Promises unbreakable | Raises attacker cost, stated plainly |
Drag and drop your file into the dashboard or use our Discord bot.
Select light, medium, or heavy protection based on your needs.
Get your obfuscated file with unique VM encryption. Ready to deploy.
Yes. We've tested with leaderstats, sprint systems, double jump, kill feeds, shop GUIs, cheat menu GUIs (161KB+), and more. If it works in Lua 5.1, it works obfuscated.
Yes. Our obfuscation does NOT require loadstring, so it works perfectly in LocalScripts where loadstring is disabled by Roblox.
While no protection is 100% unbreakable, VM obfuscation makes your scripts extremely difficult and time-consuming to reverse. Most exploiters will move on to easier targets.
Yes. We automatically convert Luau features (+=, continue, type annotations, compound assignments) to Lua 5.1 compatible code before obfuscation.
It stops your code from being read, edited, and resold. It does not stop an exploiter from observing runtime behavior, logging your RemoteEvents, or dumping what the client receives. That is why server authority still matters: keep sensitive logic in ServerScripts, validate everything on the server, and use obfuscation to protect the client code and distributed systems you cannot avoid shipping.
Usually no, because ServerScripts never replicate to players, so exploiters cannot dump them from a live game. Obfuscate server code when you distribute it: selling a system, shipping a model with scripts inside, or handing a place file to someone you do not fully trust.
Joker includes 300 free credits, and the free builds use the same VM bytecode pipeline as paid ones. Fully free tools exist, but they are renaming-and-string-encoding obfuscators, and both automated tools and AI models reverse that class of protection quickly.
AI is very good at reversing renamed or minified scripts, because renamed source is still source. VM bytecode output gives a model an interpreter and an encrypted instruction stream instead, with nothing source-shaped to read, and every build is different. No protection is absolute, but the cheap AI attack does not apply.
The output is standard Luau-compatible source using ordinary language constructs. It does not require loadstring and makes no network calls just to run, and it has been tested in Studio on real games with leaderstats, GUIs, and combat systems.