Catalyst is in open beta — grab a free key
· open beta

The script editor
Roblox deserved

A fast, native Lua editor with a curated script hub, autoload, and multi-session execution.

Download for macOS Try the live demo
Run on every session at once Native & fast Apple Silicon, Intel, Windows

Weight is a feature you
pay for every launch

Most executors ship a browser engine to draw a text box. Catalyst is a native app, so it opens before you've finished letting go of the mouse — and it stays out of the way while you work.

Cold launch
0.4sto a usable editor

No splash screen, no runtime to boot. The window is there before the dock icon stops bouncing.

Browser-based tools~6.0s
Typical executor~2.8s
Catalyst0.4s
Memory at idle
62MB resident

One native process instead of a renderer, a GPU helper, and three background workers.

Browser-based tools~540 MB
Typical executor~310 MB
Catalyst62 MB
Sessions per run
Allof them, one click

Tick the clients you want in the titlebar, hit Execute once, and the script lands on every one.

Browser-based tools1
Typical executor1, manually
CatalystUnlimited

Measured on an M2 MacBook Air, Catalyst 0.1.6. "Typical executor" and "browser-based tools" are category averages, not any one named product.

Live, in your browser

Not a screenshot. The actual app.

Everything below is real and running right here. Type in the editor, switch tabs, pick your sessions, execute, and re-skin the window with any of the eight presets.

Catalyst BETA
Detached 0 selected Ready

Click around — it behaves like the desktop build, minus the Roblox part.

What's inside

Built for people who actually script

Six tools in one window. No tab sprawl, no wizard, no clutter.

From download to running in minutes

Three steps. No installer wizard, no account signup.

01

Install

Grab the .dmg, drag Catalyst into Applications, and clear the one-time quarantine flag with a single Terminal command.

02

Unlock

Paste your key once — free, boosted, or paid. It locks to your device, and the time remaining is always visible in Settings.

03

Attach & run

Pick your sessions from the titlebar, hit Execute, and your autoload scripts fire the moment a session attaches.

Download Catalyst

Universal build for Apple Silicon and Intel. Auto-updates once installed.

macOS

Universal · .dmg

Download for macOS

Windows

Windows 10/11 · .exe installer

Download for Windows
Pricing

Start free. Pay when it earns it.

Two free tiers and two paid ones. Nothing is missing from the free plans that isn't clearly named.

Save 20% with annual billing

Compare every plan

Questions, answered

Yes. Hit Get a free key, finish a short ad flow on the provider of your choice, and one is issued on the spot — no card, no signup. It runs for 24 hours from the moment it's issued and locks to the first machine that uses it, so there's nothing to stockpile. When it runs out, watch another and get a new one. You get the editor, saved scripts, and the built-in themes. Multi-session and the Script Hub are on the paid tiers.

The Booster tier: the same features as Free, but with far fewer ads and a much longer key before it needs renewing. It stays active as long as your boost does.

Same app, different ceilings. Plus attaches to up to 5 sessions, keeps 25 autoload entries, and gets standard support. Pro removes the caps, adds the custom theme editor and early builds, and moves you to priority support.

A key locks to the device it's first activated on. Pro can reset that binding from Settings when you switch machines; on the other tiers, ask in the Discord and we'll move it for you.

It isn't — that's Gatekeeper's quarantine flag on any app downloaded outside the App Store. One Terminal command clears it, and it's printed on the download step above.

No. Catalyst is an independent tool and is not affiliated with, endorsed by, or sponsored by Roblox Corporation.

Stop fighting your tools

Download it, paste a free key, and see how much of the friction was never yours.

Download for macOS Join the Discord