Roblox FPS Unlocker Download in 2025

Roblox FPS Unlocker (RFU) is a free, open-source tool created by developer axstin that removes the default 60 FPS limit in Roblox games. It doesn’t modify Roblox files – it simply unlocks framerates through memory access.

• Latest version: v5.1 (supports 64-bit clients)
• Display FPS in-game with Shift + F5
• Does not boost performance – just uncaps frame limit

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Is Roblox FPS Unlocker Safe?

Yes, if downloaded from the official source. Here’s why:

• ✅ Open-source code – transparent & verifiable
• ✅ Roblox devs confirmed on forums: it’s allowed when used responsibly
• ✅ Used by millions with no bans reported

Potential Risks

• False-positive antivirus flags (especially on 32-bit version)
• Could cause CPU/GPU strain on older devices
• Don’t download from unofficial sources

Related: Is Roblox FPS Unlocker Safe?

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How to Install Roblox FPS Unlocker (Step-by-Step)

1. Visit the official FPS Unlocker source
2. Download the latest .zip version (use 64-bit)
3. Extract the folder to your desktop
4. Run rbxfpsunlocker.exe
5. Launch Roblox – FPS is now uncapped

Tip: Add the folder to antivirus exceptions to prevent false flags.

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Alternative: FastFlag JSON Method

If you don’t want to run an .exe tool, Roblox allows framerate changes via client settings:

1. Navigate to Roblox install folder > Versions
2. Create a file named ClientAppSettings.json
3. Paste:

{
  "DFIntTaskSchedulerTargetFps": 240
}

4. Save and restart Roblox

This method is 100% safe, but doesn’t always work reliably with updates.

Compare: FPS Unlocker vs FastFlag

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FPS Unlocker Not Working? Try This:

• Run as administrator
• Whitelist in antivirus/firewall
• Restart PC and try again
• Try FastFlag JSON as backup option

Read: How to Fix FPS Unlocker Crashes

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FAQs

Is Roblox FPS Unlocker allowed?
Yes. Roblox developers confirmed it’s not bannable.

Will it damage my PC?
No. But unlocked FPS can strain low-end systems.

Does it improve performance?
No. It removes the 60 FPS cap – it doesn’t boost hardware speed.

Is the FastFlag method safer?
Yes. It’s file-based and doesn’t run executables.

Can I use both methods?
Yes, but FPS Unlocker will take priority.

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Final Thoughts

Roblox FPS Unlocker is a legit, open-source tool to enhance your Roblox experience. Use it responsibly, and always download from the official source.