Roblox locks your frame rate to 60 FPS even if your PC can handle more. On older laptops and budget desktops, that ceiling means the client still works hard, but stutters stay. BloxBoost removes the cap, tunes performance flags, and clears junk files—in one click.
By default, Roblox is hard-capped at 60 frames per second. That's not a suggestion—it's built into the client settings. On a tired machine with an old CPU or integrated GPU, 60 FPS is still demanding. Your PC works as hard as it can, but the game feels choppy because it's locked to a low ceiling.
Clearing your Roblox cache helps too. Logs, temporary files, and cached assets pile up and slow the startup and in-game performance. Running the game at High CPU priority gives it consistent access across all your cores, steadying the frame pacing.
The fix is simple: unlock the frame cap through Roblox's own settings file, wipe the cache, and bump priority. That's exactly what BloxBoost does.
Ultra removes all frame limits and strips to bare-bones visuals (Voxel lighting). For very old laptops that need every frame they can get. High caps at 360 FPS with the same lighting—the most common choice for low-end PCs. Balanced locks at 144 FPS with better visuals (ShadowMap lighting), smooth without losing the look. Quality goes to 240 FPS with full real-time lighting (Future)—only if your machine is strong.
You can switch presets anytime. Just pick a new one and click Boost again. Hit Reset first to clear the old preset, then apply the new one.
The app writes to Roblox's own ClientAppSettings.json file—the exact same mechanism that Bloxstrap and community FastFlag packs use. It's not an injector, not a memory patcher, not a game file modifier. Roblox reads this settings file on launch; BloxBoost just edits it.
Every change is reversible. Press Reset and the app removes every flag it wrote. Your Roblox goes back to vanilla.
The tool is fully offline. No telemetry, no phone home, no background services. Close the window and it's gone. Open source under MIT—every line is readable.
The app does not inject code or patch game files—it only edits the client settings file that Roblox itself reads. The same file community packs edit by hand. That said, Roblox makes the final call. Check their rules if you're unsure.
Yes. Windows 10 and 11, 64-bit only.
Yes. One click applies the preset to every Roblox version installed on your PC.
Press Reset. Every flag is removed instantly and Roblox returns to its original state.
Download for Windows 10 and 11, run the installer, pick a preset, and boost.
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