A free, lightweight Windows tool that boosts FPS in Roblox — a graphics optimizer for low-end PCs.
🌐 Website: bloxboostpc.com
Pick a preset, hit Boost, launch Roblox. BloxBoost tunes Roblox's own FastFlags, clears the cache and prioritizes the game — all from one tiny portable .exe. No install, no ads, no telemetry. Built for roblox fps boost on a roblox low end pc.
- 🚀 One-click Boost — applies a full FastFlag preset to every installed Roblox version at once.
- 🔥 Four presets — Ultra FPS, High FPS, Quality, Balanced — tuned for everything from potato laptops to high-end rigs.
- ⏱️ FPS unlock — lifts Roblox's default 60 FPS lock (up to 144 / 240 / 360 / unlimited depending on preset) via the standard TaskScheduler target-FPS flag.
- 🎛️ Smart render backend — Vulkan (and Metal on macOS) for max frames, stable Direct3D11 for the quality tiers, with D3D11 always kept as a safe fallback.
- 💡 Tiered lighting — legacy Voxel for raw speed, ShadowMap for the balanced default, full Future (real-time) lighting for the best looks.
- 🪫 Deep low-end controls — disable MSAA, post-processing, shadows, terrain grass, composited avatar textures and first-person particles to reclaim frames.
- 🧹 Cache cleaner — wipes Roblox logs / temp / cached assets and reports how many MB it freed.
- 🎮 Prioritize Roblox — sets the running player to High priority and all CPU cores for steadier frame pacing.
▶️ Launch integration — open Roblox straight from BloxBoost, preset already applied.- ↺ Fully reversible — Reset removes every flag BloxBoost added and leaves your own settings untouched.
- 🪶 Portable — one small
.exe, no installer, runs on Windows 10/11 (.NET Framework 4.8, preinstalled).
BloxBoost writes Roblox's own ClientAppSettings.json (in each Versions\<ver>\ClientSettings folder) — the exact same mechanism Bloxstrap and every community FastFlag pack use. Every value ships only after being cross-checked against the Bloxstrap FastFlag manager, the MaximumADHD client tracker, and community packs. See the full, transparent list in docs/PRESETS.md.
Grab the latest release from the Releases page:
- Download
BloxBoost.zip - Unzip it anywhere
- Double-click
BloxBoost.exe— no installation needed
- Pick a preset — 🔥 Ultra, ⚡ High, 🎨 Quality or 🎯 Balanced.
- Hit
🚀 BOOST MY ROBLOX— flags are applied, cache cleaned, Roblox prioritized. - Launch Roblox and enjoy the extra frames. Changed your mind? Press Reset.
| Preset | Best for | FPS cap | Lighting | Look |
|---|---|---|---|---|
| 🔥 Ultra FPS | potato / very low-end | unlimited | Voxel | bare-bones, max frames |
| ⚡ High FPS | low-end (recommended) | 360 | Voxel | playable, big FPS gain |
| 🎯 Balanced | everyday default | 144 | ShadowMap | smooth + still pretty |
| 🎨 Quality | strong PCs | 240 | Future | best looks |
- No ads, no bundles, no telemetry. Just the optimizer.
- Open source (MIT). Every line is public. FastFlag research is based on Bloxstrap by pizzaboxer (MIT) and the Roblox FastFlag community.
- Reversible. BloxBoost only edits Roblox's own
ClientAppSettings.json. Reset undoes it instantly, and unknown/renamed flags are skipped rather than forced. - SmartScreen note: the app is unsigned, so Windows may show an "unknown publisher" prompt — click More info → Run anyway. Nothing is hidden inside.
- Not affiliated with or endorsed by Roblox Corporation. "Roblox" is a trademark of Roblox Corporation.
Based on Bloxstrap by pizzaboxer, MIT License, and the wider Roblox FastFlag community. See LICENSE.
MIT — see LICENSE.