Roblox Fast Flags,
searched, explained, and generated.
28,117 known Fast Flags in one searchable database — 6,209 verified stable, 8,073 with a real description. Look one up, read what they actually do, or describe what you want and let the generator build a config from human-verified lists.
New to Fast Flags?
What are Fast Flags?
The FFlag/DFFlag/FInt/DFInt naming convention, and what changed with Roblox's 2025 allowlist.
How to use them
Which tool applies Fast Flags on Windows, macOS, Linux, Android and iOS — and how to undo a change.
Flags for FPS
Which flags actually affect frame rate, sourced to real verified presets — not a guess.
Browse by category
All categoriesHow it works
Every one of the 188 flags across 10 presets comes from a real, human-tested list — nothing is ever made up.
Tell it what you want
Say what you're after in plain English — smoother FPS, less input lag, no shadows, whatever matters to you.
It builds your config
Your request turns into a set of Fast Flags pulled from real, human-tested presets — never made up on the spot.
You get something ready to use
Copy the finished FastFlags.json and drop it into whichever tool applies flags on your device.
Ready to build your config?
Tell it what you want — better FPS, lower ping, no textures — and get a copyable FastFlags.json in one step.
Open the generator