The most powerful Luau obfuscator for Roblox

Bias protects your Roblox Studio scripts and executor scripts with VM-based bytecode virtualization, control-flow flattening, string encryption, and anti-tamper instrumentation. Every obfuscated build generates a unique virtual machine — no two outputs are the same, making static deobfuscation impossible. Free to start.

Best-in-class Luau obfuscation features

Every protection pass is tunable. Dial in exactly the trade-off between script size, runtime performance, and obfuscation strength that your Roblox project needs.

• Bytecode virtualization

  Your Luau script is compiled into a custom instruction set and executed by a generated virtual machine unique to every build. The strongest protection for Roblox scripts — the VM cannot be targeted by existing deobfuscators.

• Control-flow flattening

  Branches, loops, and function bodies are collapsed into a single opaque state machine that destroys the logical structure of your Luau code.

• String encryption

  All string literals in your Roblox script are encrypted at rest and decrypted only at runtime, preventing trivial keyword searches from exposing your logic.

• Anti-tamper environment checks

  Runtime instrumentation detects debuggers, hook injectors, and environment inspection tools common in Roblox executor environments.

• Constant folding and dead-code elimination

  Bias runs an IR optimization pass before obfuscation so your protected Roblox script stays lean and fast.

• Web API for automation

  Integrate Luau obfuscation directly into your CI/CD pipeline or Roblox game deployment workflow via Bias's HTTP API.

• Macro system and drop-in compatibility

  Fine-tune every stage of the obfuscation pipeline. Alias macros let Bias act as a drop-in replacement for other popular Luau obfuscators — no changes to your existing Roblox scripts required.

• Minification

  Strip whitespace, comments, and unused symbols from your Luau code — free for all users.

Free Luau obfuscation — upgrade when you need more

• Free — $0/month

  31 obfuscations per month. 400,000-character Roblox script limit. Top-ups from $0.80. No credit card required.

  Get started

• Basic — $7/month

  62 obfuscations per month. 10,000,000-character limit. Web API access. Top-ups from $0.30.

  Get Basic

• Plus — $14/month

  80 obfuscations per month. 25,000,000-character limit. Web API access. Top-ups from $0.15. Best for teams and high-volume pipelines.

  Get Plus

Frequently asked questions about Luau obfuscation

What is Bias?

Bias is a Luau obfuscator built specifically for Roblox. It protects your Roblox Studio scripts and executor scripts by compiling them into a uniquely-generated virtual machine with control-flow flattening, string encryption, and anti-tamper instrumentation.

How do I obfuscate a Roblox script?

Create a free account at usebias.win, paste your Luau script into the Studio editor, configure your protection settings, and click Obfuscate. The protected output drops straight back into Roblox Studio.

Is Bias free to use?

Yes. Bias has a free tier with 31 obfuscations per month and a 400,000-character script limit. Paid plans start at $7/month.

How does Luau obfuscation work?

Bias compiles your Luau source into a custom bytecode format and generates a unique VM to execute it. Combined with control-flow flattening, string encryption, and anti-tamper checks, the output is extremely difficult to reverse-engineer.

Does Bias work with Roblox executor scripts?

Yes. Bias supports both Roblox Studio game scripts and executor scripts. The obfuscated output is valid Luau that runs in any standard Luau environment.

How is Bias different from Luraph or Ironbrew?

Bias generates a unique VM per build so every output is different and cannot be targeted by static deobfuscators. It also ships a macro system for pipeline control and the only dedicated Web API in the Luau obfuscator space.