The premier external executor for Roblox.
Direct Luau bytecode spoofing, undetectable user-mode execution, 100% crash-free place hops, and verified 90% UNC coverage.
FREE · Windows 10 and 11 · v1.0
- 90%
- UNC coverage
- 75%
- sUNC coverage
- 86%
- Myriad pass rate
- 100%
- Vulnerability test
- Free
- No key system
- 100%
- Crash-free place hops
External execution. Built for stability.
Engineered for pure user-mode invisibility, zero foreign DLL injection, and uninterrupted place hopping.
External Bytecode Compiler
Luau scripts are tokenized and compiled on an isolated external runtime. Bytecode is streamed cleanly into memory, preventing in-process compiler crashes inside Roblox.
BYTECODE_SPOOFProprietary Luau Decompiler
Built-in abstract syntax tree (AST) reconstruction engine designed specifically for Luau bytecode. Reconstructs upvalues, local variable scopes, proto constants, and control flow branches into clean, human-readable source code.
AST_DECOMPILERCrash-Free Server Hops
External memory synchronization deterministically re-binds across teleports and server switches in ~3 seconds. Zero thread desynchronization, 100% crash-free.
STABLE_REBINDNative FastFlags Mutator
Direct real-time interface with Roblox engine flags. Unlock frame rates beyond 240Hz, disable crash telemetry reporting, and fine-tune rendering buffers on the fly.
FFLAGS_ENGINEFrequently asked questions.
How does Thorium execute scripts without in-process injection?
Traditional executors force a foreign DLL module directly into the target process memory, causing instability and triggering anti-tamper scans. Thorium runs entirely as an isolated external utility: scripts are compiled externally and synchronized via direct Luau bytecode spoofing. The Roblox virtual machine executes the bytecode natively in its normal execution pipeline with zero injected DLL modules.
How much UNC and sUNC coverage?
90% UNC, 75% sUNC, 86% Myriad — and a verified 100% pass rate in the vulnerability test.
Thorium was engineered with memory-safety boundaries and strictly audited against remote code execution (RCE) and local exploit vulnerabilities. The audit is publicly accessible and verified: read the full sUNC report at r.sunc.su. Popular and complex script hubs execute reliably without environment gaps.
Why is Thorium free?
Thorium is developed as a high-performance external utility without key gates or paywalls. There are no subscriptions, no key systems, and no software paywalls.
Where is it safe to download Thorium?
Exclusively from thoriumrbx.xyz. thoriumrbx.xyz is the only official domain — if you downloaded Thorium from any third-party source, reupload, or unverified mirror, you have likely been scammed or infected with malware.
Does Thorium crash during server hops or break on updates?
No. In-process DLL hooks corrupt thread execution contexts when places reload, causing typical injectors to freeze or crash. Thorium operates externally via clean bytecode spoofing, automatically detecting place transitions and re-binding seamlessly in ~3 seconds. Client updates are supported rapidly without long downtime.
What are the minimum system requirements?
Windows 10 (64-bit, Version 1903+) or Windows 11. Requires Microsoft Visual C++ 2015–2022 Redistributable (x64) and .NET Desktop Runtime 8.0+. Compatible with Intel and AMD x64 architectures.
Start executing. It’s free.
Windows 10 and 11 · Instant setup