Starts up
about 11× fasterRustBlox
194–238 ms
Official app
2,625 ms
One portable .exe27.4 MB. No installer and no extra folders.
Official sign-inUses Roblox Quick Login. Your session is encrypted on your PC.
You control updatesUpdates download only when you click Update.
Live performanceFPS, RAM and CPU stay visible while you browse.
Find a game and jump in
Your friends, trending games and the experiences you played last sit on one home screen. Search from the top bar and press Play.
- Friends list with what they’re playing right now
- Top Trending and Continue rows
- Charts for browsing what’s popular
Change your avatar in the app
Browse your inventory by category, filter by name and change what you’re wearing. Switch between R6 and R15 and save outfits.
- Accessories, hair, shirts, pants, faces and more
- Live avatar preview
- Your profile shows what you’re wearing
Sign in through Roblox
RustBlox connects directly to roblox.com and signs you in with the official Quick Login. Add more than one account and switch between them.
Pick your colors, or use your own wallpaper
Change how RustBlox looks in Settings and see a live preview of Home, Profile and Login before you commit.
- Six styles: Light, Dark, Mint, Rose, Ocean and Sand
- Light or dark mode for each style
- A solid color you choose, or your own wallpaper with a dim slider
- Optional border colors
Opens in a blink
From a double-click on the desktop to the home screen, as recorded on a real PC.
What’s new in v0.2.0
Update from inside the app
- Check for and install new versions in Settings.
- Big updates close RustBlox, show an Updating RustBlox window with live progress, replace the .exe and relaunch.
- Small patches apply in the background without a restart.
- Nothing installs until you click Update, and you can turn off the startup check.
Notifications
- Top-center popups, a silent mode and a Notifications page in the sidebar.
- Alerts only for updates, Roblox background auto-kill and incoming friend requests.
- Each alert shows once, even across restarts.
Look and feel
- Live theme preview in Settings for Home, Profile and Login.
- Text switches between light and dark automatically to stay readable.
- Smoother animations.
Why it opens in 0.2 seconds
That 0.2 seconds is the RustBlox window opening. The game itself still starts through the official Roblox client.
The interface is native Rust
It’s drawn on your graphics card with eframe and egui. There’s no WebView, Electron, Chromium or JavaScript engine inside.
The window opens first
Your game lists, friends and saved session load on background threads, so the app never waits on the network before it appears.
Roblox stays closed until you press Play
The official app starts the full game engine and a crash handler just to show its menu. RustBlox starts none of that until you click Play, then closes Roblox again when you’re done.
It talks to Roblox directly
RustBlox calls Roblox’s web APIs itself instead of hosting a web page, and opens outside links in your normal browser.
It remembers what it loaded
Game lists, friends, thumbnails and hover video previews stay in memory while you browse, and refresh quietly in the background. Your recent games and favorites are saved on disk.
What it leaves out: Roblox Studio, the full web marketplace and checkout pages, and Roblox chat. RustBlox focuses on finding games, launching them, friends, avatar editing, FastFlags and updates.
Light on your PC
Measured with RustBlox v0.2.0 on the developer’s own computer, compared with the official Roblox app. Your numbers will vary.
Takes up less disk
13× smallerRustBlox
27.4 MB
Official app
358.8 MB
Uses less memory
over 3× less RAMRustBlox
318–324 MB
Official app
1,077 MB
See every number
| RustBlox | Official Roblox app | |
|---|---|---|
| Size on disk | 27.4 MB (one .exe) | 358.8 MB (install folder) |
| Window startup, warm | 194–238 ms | 2,625 ms |
| Idle RAM, working set | 318–324 MB | 1,077 MB |
| Idle RAM, private | 343–348 MB | 1,278 MB |
Questions
Is RustBlox free?
Yes. It’s completely free, with no paid tiers or subscriptions.
Does it need anything installed?
- Windows 10 or Windows 11.
- Nothing else for RustBlox itself: it’s one portable rustblox.exe with no installer.
- The official Roblox Player must be installed once from roblox.com, because RustBlox launches the official Roblox client.
Does it store my password?
No. RustBlox never asks for or stores your password. You sign in with Roblox’s official Quick Login, approved with a code or QR on roblox.com. Your local session is encrypted on your PC with Windows DPAPI, tied to your Windows account, and wiped when you sign out.
Is there a ban risk?
RustBlox is a launcher, not an exploit, script executor or memory injector. It starts the official RobloxPlayerBeta.exe and adjusts client FastFlags in ClientAppSettings.json, like other third-party launchers such as Bloxstrap. It’s still an unofficial tool, so nobody can promise zero risk if Roblox changes its policies, or if you add risky custom FastFlags yourself.
Is there a Mac or Linux version?
Not yet. Windows 10 and 11 are the only supported systems today. macOS and Linux versions are planned, and you can follow progress on GitHub.
Windows says it’s unsafe. What do I do?
RustBlox is a small hobby project that isn’t code-signed, so Windows SmartScreen or your browser may warn you about it. If you see “Windows protected your PC”, click More info, then Run anyway. Only download it from the official release page linked here, and if you want to be sure, read the source code or build it yourself from GitHub.
Is the code open source?
Yes. You can read it, build it and report problems on GitHub.
Get RustBlox
Version 0.2.0 for Windows 10 and 11. It’s free and open source, and updates only install when you ask. macOS and Linux versions are planned.
- Download rustblox.exe. Install the official Roblox Player once if you haven’t.
- Run RustBlox and press Sign in with Quick Login.
- Pick a game and press Play.
SHA-256 of rustblox.exe v0.2.0. To check your download, run certutil -hashfile rustblox.exe SHA256 in PowerShell and compare:6445933233cc02a209952699bf9d397f293d10e3c2030da94fa6ac404afc5fd8