The RoUI plugin lets you paste generated Luau code directly into Roblox Studio. It creates a ScreenGui in StarterGui with all your UI elements.
Download the plugin
Click the button below to download RoUI_Plugin.lua
Move to Plugins folder
Windows: %LOCALAPPDATA%\Roblox\Plugins — Mac: ~/Documents/Roblox/Plugins
Restart Roblox Studio
You'll see a "RoUI" toolbar with an "Import UI" button
Copy code from RoUI
In the web app, click Export → Copy Luau Code
Click Import UI in Studio
Paste the code into the dialog and click Import
Important
Before importing, uncomment the last line of the generated code (the .Parent = yourScreenGui line) so the UI gets parented correctly. The plugin provides yourScreenGui as a ScreenGui in StarterGui.
Alternative: .rbxmx File
You can also download a .rbxmx file from the Export menu and drag it directly into Studio's Explorer panel. No plugin needed.