Yes. MIT licensed, no trial period, no locked features. It will never ask for money.

Do I need to create an account?

No. The app opens straight to the dashboard. Nothing to sign up for, no login, no phone-home.

Will it get me banned?

The tool works through Roblox's own settings file, the same way community FastFlag packs do, and injects nothing into the game. Roblox decides which flags it allows, so check its current rules if you are unsure.

Can I undo the changes?

Yes. The Reset button in the app reverses every change in one click. Roblox goes back to its original state.

Does it work on Windows 11?

Yes. The app runs on Windows 10 and 11. No Mac or Linux version.

What if my PC is already fast?

The Balanced or Quality presets are better choices. They keep visual richness while still unlocking the cap. If you're already hitting 240+ FPS, the boost will be less noticeable.

Does it slow down my PC when closed?

No. Close the window and the process ends. Nothing runs in the background, no tray icon, no lingering service.

RBX FPS Booster — Free Frame Rate Unlocker for Roblox

Real frame gains

Inside the app RBX FPS Booster window

See your frame rate before and after.

The difference shows the moment you hit Boost. On older laptops, you'll jump from the locked 60 to 120, 150, or higher depending on your preset. The app reports exactly what changed.

Ultra presetBare-bones visuals, unlimited frames — for the oldest machines where every frame counts.

High presetVoxel lighting, 360 FPS cap — the sweet spot for low-end PCs that need both speed and playability.

Balanced presetShadowMap lighting, 144 FPS cap — smooth gameplay without sacrificing the look of modern Roblox games.

How it works

Why RBX FPS Booster works on weak hardware.

It hits three targets: the frame cap, the graphics flags, and the CPU priority.

Lifts Roblox's frame cap

Classic Roblox tops out at 60 FPS by design. The tool writes Roblox's own settings file to unlock that ceiling. Your CPU gets to do what it's capable of, not what the engine throttles it to.

Tunes the hidden flags

Each preset adjusts lighting quality, shadow distance, and other toggles buried in Roblox's config. The changes are transparent—you can see exactly what each preset writes in the docs.

Clears the cache

Old log files and cached assets slow down startup and frame pacing. The tool wipes them and reports how many megabytes you reclaimed. Everything comes back the next time you play.

Bumps CPU priority

Sets the Roblox player to High priority so it gets steadier access to your CPU cores. Older processors feel the difference when other apps are running.

Quick start

How to boost your frame rate in four steps.

No tutorials, no account—just the dashboard and the big button.

1
Open the appOpen the downloaded zip and run the installer inside. Windows may show a SmartScreen notice—click More info and Run anyway.
2
Pick your presetChoose Ultra for maximum frames on old hardware, High for the balance most players want, or Balanced if your GPU is better than your CPU.
3
Click Boost My RobloxThe app writes the flags, clears the cache, and sets the priority in seconds. A confirmation tells you it's done.
4
Launch and playClick Launch Roblox from the dashboard or open the game the usual way. The preset stays active until you reset.

Common questions

Questions about boosting Roblox.

Q1
Is it really free?
Yes. MIT licensed, no trial period, no locked features. It will never ask for money.
Q2
Do I need to create an account?
No. The app opens straight to the dashboard. Nothing to sign up for, no login, no phone-home.
Q3
Will it get me banned?
The tool works through Roblox's own settings file, the same way community FastFlag packs do, and injects nothing into the game. Roblox decides which flags it allows, so check its current rules if you are unsure.
Q4
Can I undo the changes?
Yes. The Reset button in the app reverses every change in one click. Roblox goes back to its original state.
Q5
Does it work on Windows 11?
Yes. The app runs on Windows 10 and 11. No Mac or Linux version.
Q6
What if my PC is already fast?
The Balanced or Quality presets are better choices. They keep visual richness while still unlocking the cap. If you're already hitting 240+ FPS, the boost will be less noticeable.
Q7
Does it slow down my PC when closed?
No. Close the window and the process ends. Nothing runs in the background, no tray icon, no lingering service.

RBX FPS Booster
Lifts the cap.