FFS.Xyzby localrccOpen Source Recommended
FastFlag manager built by the same author as this site. Applies and manages flag configs locally. Entirely open-source, no telemetry, and no external dependencies.
Windows
Roblox FastFlag Tools
FastFlag tools and their current risk rating. These ratings are our own assessment, not a guarantee — always review what you run, and prefer open-source builds you can inspect.
Use at your own risk
I don't take responsibility for any damage or loss of data that may occur from using these tools.
Device
Non RiskLow riskMedium riskHigh riskUnknown
Roblox-Fastflag-Managerby 4antiOpen Source Recommended
Open-source FastFlag manager for applying and switching between flag configurations.
Windows
Masterstrapby MasterstrapPaid
Bootstrapper-style FastFlag tool. Risk depends entirely on which version you use — rated per build below.
WindowsAndroid· releasing soon
Instance versionPackaged build — the safer of the two.
Low riskScript versionExecutes scripts; treat with caution.
High risk
Fleasionby fleasionOpen Source
Cross-platform FastFlag tool with builds for desktop operating systems.
WindowsmacOSLinux
Voidstrapby KloBraticc
Bloxstrap fork adding extra customization and performance options on top of the usual bootstrapper feature set. Windows 10 and up; a macOS build is in development. MIT-licensed and open-source.
Windows
Not every FastFlag works through this tool — only ones on Roblox's official allowlist are actually applied; the rest are silently ignored.
AppleBloxby AppleBlox
Lightweight macOS Roblox launcher with FastFlag support, Discord Rich Presence, custom fonts and icons, and server region selection. GPL-3.0 and open-source. Only applies FastFlags from its own built-in allowlist, so nothing outside vetted flags can be set through it.
macOS
Not every FastFlag works through this tool — only ones on Roblox's official allowlist are actually applied; the rest are silently ignored.
Soberby VinegarHQ
VinegarHQ's runtime for running Roblox on Linux — the client layer the other Linux tools here build on top of, rather than a bootstrapper itself. Only applies FastFlags from its own built-in allowlist, so nothing outside vetted flags can be set through it.
Linux
Not every FastFlag works through this tool — only ones on Roblox's official allowlist are actually applied; the rest are silently ignored.
Lutionby wookhq
Linux bootstrapper for Sober in the style of Bloxstrap, covering fonts, cursors, themes, FPS settings and environment variables. MIT-licensed and open-source. Only applies FastFlags from its own built-in allowlist, so nothing outside vetted flags can be set through it.
Linux
Not every FastFlag works through this tool — only ones on Roblox's official allowlist are actually applied; the rest are silently ignored.
Chevstrapby FrosSky
Android bootstrapper for applying FastFlags on mobile. Only applies FastFlags from its own built-in allowlist, so nothing outside vetted flags can be set through it.
Android
Not every FastFlag works through this tool — only ones on Roblox's official allowlist are actually applied; the rest are silently ignored.
Risk ratings reflect the likelihood of your Roblox account being banned or otherwise penalized for using a tool — not whether the software is a virus or contains malicious code. A higher risk rating means there is a greater chance of account consequences, not that the tool itself is malicious. “Unknown” means it hasn't been assessed yet. Nothing here is affiliated with Roblox Corporation.