If you're looking for free AI tools to help you script in Roblox Studio, you've probably noticed most "AI for Roblox" tools push you toward a paid subscription or require you to bring your own API key. There's a simpler path: use the AI chat interfaces you already have access to, connected directly to Roblox Studio.
That's what ZeroScript does. It's a free, open-source browser extension that connects multiple AI chat interfaces to Roblox Studio via MCP, no subscription and no API key needed. Here's a breakdown of which free AI providers work well for Roblox scripting, and how to use each one.
DeepSeek
DeepSeek is a solid default for Lua/Luau scripting. It handles standard Roblox patterns (RemoteEvents, DataStores, module scripts) reliably and is fast enough for quick iteration. Good first choice if you're not sure where to start.
Gemini
Gemini is the fastest of the bunch, good for quick iterations. The tradeoff is it's less precise than the others and can be a bit unstable, so double check the output before trusting it on anything critical.
GLM
GLM is a capable general coding model that performs well on Roblox-specific syntax. Worth trying as an alternative if you want to compare outputs against DeepSeek on the same prompt. Note that it's currently in high demand, so it can be unavailable at times.
Kimi
Kimi is very smart, but slower, and it has a tendency to get stuck in tool call loops.
Qwen
Qwen is another reliable option for everyday scripting tasks. Like GLM, it's worth keeping in rotation to compare results, since different models can produce noticeably different approaches to the same Roblox problem.
Arena
Arena lets you compare multiple models on the same prompt side by side, useful when you want to see which model handles a specific Roblox pattern best before committing to one.
How to connect any of these to Roblox Studio
All six providers above connect to Roblox Studio the same way with ZeroScript, a free browser extension. Here's the full setup:
📺 Prefer video? Full walkthrough: setup tutorial on YouTube
1. Download and install the extension
Grab the latest zip from the GitHub Releases page and extract it. It contains the Bridge and the extension folder.
To load the extension:
- Go to
edge://extensions(Edge) orchrome://extensions(Chrome) - Enable Developer mode (top right toggle)
- Click Load unpacked
- Select the
zeroscript-extensionfolder from the extracted zip
2. Enable MCP in Roblox Studio
Open Studio, load a Place, then (first time only):
- Click Assistant AI in the top bar
- Click ... (top right of the Assistant panel)
- Click Manage MCP Servers
- Click Enable Studio as MCP Server
3. Run the Bridge
Double-click start.bat inside the extracted folder. A small window opens, that means the Bridge is running.
4. Start a session
Go to chat.deepseek.com, gemini.google.com, kimi.com, chat.z.ai, chat.qwen.ai, or arena.ai and open a new chat. The ZeroScript bar appears above the input box. Click Start session, then type what you want to build.
On Arena, keep the mode dropdown on Direct, ZeroScript blocks Start in Battle / Side-by-Side / Agent modes.
Need help?
- 💬 Stuck or got feedback: Discord community
- ⭐ Source code: GitHub repo
It's free and open-source, no API key, no subscription.
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