How to stop people stealing your Roblox script. Raise the cost, trace the leak, cut off access.

Start from the truth, because a guide that promises theft-proofing is lying to you. An authorized player receives the code they run, so a determined person with that access can study it. No client-side tool changes that. What you can do is raise the cost of copying, limit how far one copy spreads, and keep the ability to cut off access when a leak happens.

The way to do that is layers. No single setting stops theft; a stack of them makes it expensive and traceable enough that most people move on to an easier target.

The first layer is making the distributed code hard to read and reuse. vodka's default build encodes constants, flattens control flow, renames locals and watermarks the output, and an opt-in bytecode VM goes further for the scripts that warrant it. A copied file is then a wall of transformed Luau rather than your clean source.

Walk through the specifics in how to obfuscate and protect a Luau script, and see exactly what the engine does and does not defeat on the protection reference and the benchmarks.

Protection slows a reader. A key system controls who gets the script at all, and that control is what lets you respond to a leak:

• A server-enforced key means only people you authorized run the current release, and you can revoke that authorization later. See how to add a key system.
• HWID locking binds a key to one machine, so a single shared key does not spread across a whole server. Read HWID locking explained.
• Revocation and a blacklist turn a leak from a permanent loss into a one-time one: kill the key, block the user, ship on.

When a copy does get out, the useful question is which key it came from. Each keyed delivery on vodka carries a traceable per-key fingerprint, so a casually leaked copy maps back to the key that received it. That turns a vague loss into a specific one you can act on.

With the source key identified, you revoke it. The leaked copy stops verifying, the person who leaked it loses access, and your paid or gated flow is back in one piece. Tracing plus revocation is what makes a key system worth more than a password.

The strongest protection against theft is not shipping the valuable thing at all. Any secret you put inside the client can be recovered from the client. Any check you write into the loader can be edited out of the loader. So the logic you truly cannot afford to lose, and the decision about who gets access, belong on a server where the client never sees how it works.

That is exactly why vodka enforces the key, expiry, revocation and HWID checks server-side rather than trusting the loader. Protection raises the cost of copying; the server is what actually gates access.