Roblox script generator: AI that writes the Luau for your game

Short answer: PromptBlox writes Luau, Roblox’s scripting language, as part of building a whole game. You describe the game in chat, including what players do and how a round is won or lost. The build makes the world and the scripts that run it: server scripts, scripts for each player’s device, and shared modules. You change the scripts by asking in chat, and you read, edit and test them in Roblox Studio after you export.

It is not a box that returns one script to paste into a game you already have. For that job, Roblox’s own Assistant works inside Studio; the comparison below covers when to use which. PromptBlox is for creators 13 and older.

What PromptBlox writes

Every build that has gameplay includes a set of Luau scripts. Each one is a Roblox Script, LocalScript or ModuleScript, and each is tied to the things in the world it runs, such as a door, a shop counter or a checkpoint. When you ask for a key that opens a door, the build plans scripts for picking up the key, showing it on screen and checking it at the door, and links those scripts to the key and the door in the world.

Builds with gameplay also include a helper ModuleScript named SceneBindings. The other scripts use it to find the parts that make up a named object. It looks parts up by an attribute called SceneProgramPartId rather than by name, so if you edit a part by hand in Studio, keep that attribute.

Where the scripts are in your export

Export downloads a .rbxlx place file with the world and its scripts. Open it in Roblox Studio and the scripts sit in the usual Roblox services in the Explorer window:

Each script’s code is stored as its normal Source, so it opens in Studio’s Script Editor like any script you wrote yourself. Export is included on every plan, Free too.

How Roblox scripting works

Roblox scripts are written in Luau, a scripting language derived from Lua 5.1. Three ideas from Roblox’s documentation explain most of what you will find in an exported game.

Server and client

Roblox games are multiplayer by default. In Roblox’s client-server model, the server holds the real state of the game and keeps every player’s device, the client, in sync. Scores, damage, rewards and anything that must be fair belong on the server. On-screen text, camera moves and effects that only one player sees belong on the client.

Three kinds of script

• Script: with its default settings, runs on the server from a server container such as ServerScriptService.
• LocalScript: runs only on a player’s device, from containers such as StarterPlayerScripts.
• ModuleScript: code that other scripts load with require(). Modules in ReplicatedStorage can be shared by server and client scripts (reuse code).

Where a script sits decides whether it runs at all. Roblox’s page on script types and locations explains the rules and the RunContext setting.

RemoteEvents

When a player clicks a button on their screen, the click happens on the client, but the server decides whether it counts. A RemoteEvent carries the message across: the client calls FireServer, and a server script listening on OnServerEvent checks the request and applies it. Roblox’s guide uses a potion as its example: before the effect is applied, the server checks that the player really has the potion.

For your prompt, this means saying what the server should decide and what each player should see. “The shop checks that the player has enough coins before it takes them” tells the build where the check belongs.

How to describe mechanics so the scripts come out right

Scripts follow the rules you give. Build each mechanic in your prompt from five parts:

Put together, mechanic descriptions read like these:

• Key and door: “Put a golden key on a stone pedestal in the cave. When a player touches it, they carry it and a key icon appears on their screen. The iron door at the end of the cave opens only for a player carrying the key, then closes after five seconds. If that player falls into the lava, they lose the key and it returns to the pedestal.”
• Coins and a shop: “Coins appear around the plaza every 10 seconds, up to 20 at a time. Touching a coin gives that player 1 coin, shown at the top of their screen. The shop stand sells a speed boost for 25 coins that lasts 30 seconds. The server checks the player has enough coins before it takes them.”
• Rounds: “Each round lasts three minutes. Players wait in the lobby, move to the arena when a round starts, and return to the lobby when it ends. The player with the most tags wins, and everyone sees the winner’s name for five seconds. Players who join mid-round wait in the lobby.”
• A drivable kart: “Add a red go-kart at the start line that a player can sit in and drive with WASD. Driving through the four checkpoints in order counts as a lap, and three laps finish the race. Show each player their lap count.”

Change a script by asking in chat

You change the scripts the same way you started: in chat. Name the object and the behavior, and say what should stay the same:

• “The iron door should open only for the player carrying the key. Keep the five-second close timer.”
• “Coins should come back 10 seconds after someone collects them, not straight away.”
• “When a round ends, send everyone to the lobby and reset every score to zero.”

PromptBlox edits the game’s scripts and world in the same saved project, and every version is saved. Each refinement draws on your weekly usage allowance. A code view in the workspace is coming soon; for now you read the scripts in Roblox Studio after you export. Export again and test the new file in Studio: a refinement is a new version to check, not a guaranteed fix. If a change makes things worse, return to an earlier version in History and word the request differently. The guide to fixing and refining a game shows how to describe a playtest problem.

If you edit a script by hand in Studio, that edit stays in your .rbxlx file and PromptBlox does not see it. To keep working on the edited version in PromptBlox, use Upload a game in your Library (.rbxlx files up to 25 MB); it becomes a new project. Keep track of which file you tested.

Read and test the scripts in Roblox Studio

Roblox Studio is free for Windows and Mac. If it is new to you, start with installing and opening Studio. Then:

1. Open the export. Open the .rbxlx file in Studio and save a working copy before you change anything.
2. Find the scripts. In the Explorer, expand ServerScriptService, StarterPlayer › StarterPlayerScripts and ReplicatedStorage. Double-click a script to open it in the Script Editor.
3. Open the Output window. Roblox’s Output window, in the Window menu or the Script tab, shows errors from running scripts, warnings, and anything a script prints. You can filter it by Client or Server and show the script name and line number of each message.
4. Playtest. Choose Test and press Play (F5) to spawn your avatar. During the test, the Client/Server toggle switches between the two sides, and Output labels client messages blue and server messages green (testing modes).
5. Test with more than one player. For multiplayer rules, choose Server & Clients with one or two clients. Stop (Shift+F5) puts everything back as it was before the test.

Common messages in the Output window

More on this in customizing and playtesting a game in Studio. When the game holds up, publish it with File › Publish to Roblox; see how to publish your game.

Other AI tools for Roblox scripting

Several AI tools write Roblox code. They differ in where they work and what you start from.

Worth knowing before you pick one:

• Assistant: it is built into Studio, and Roblox’s guide notes that a generated script might not function flawlessly.
• Code Assist: it has a daily suggestion cap, and Roblox says suggestions can use older APIs, or Lua instead of Luau.
• Plugins: each has its own account, prices and terms. BloxAI (bloxai.net) also has a web code editor that syncs with Studio and shows each proposed change for you to accept or reject. Its terms require users to be 13 or older, with a parent’s or guardian’s consent under 18.
• PromptBlox: you read and edit the scripts in Studio after you export.

Roblox tool details come from Roblox’s Assistant guide and Script Editor documentation as of September 2026. For Lemonade and Rebirth, see the fact-checked PromptBlox vs Lemonade and PromptBlox vs Rebirth comparisons. BloxAI details were read on its own site on September 26, 2026.

The tools also combine. You can start the game in PromptBlox, export it, and then use Assistant in Studio for small hand edits. Keep a copy of the file from before each change. For more on AI inside Studio, read AI for Roblox Studio, and for every AI tool Roblox offers, see Roblox AI tools, explained.

What PromptBlox does not do with scripts

• Write a single script for another game. Every build is a whole game. You can copy a script out of an exported place in Studio, but it may depend on SceneBindings and on the parts of the game it came from.
• Edit code in the browser. You read and change code in Roblox Studio after you export. Inside PromptBlox you change it by asking in chat.
• Promise scripts that work the first time. A build is a first version. Playtest it, read the Output window, and refine what does not match your description.
• Run inside Studio. A PromptBlox plugin for Roblox Studio is in development and is not available yet. Today PromptBlox works in the browser and exchanges .rbxlx place files with Studio.

See plans and usage for what each plan includes.

Frequently asked questions

Related pages

• Roblox AI tools, explained: what each of Roblox’s AI features does.
• AI for Roblox Studio: Assistant, plugins and where browser tools fit.
• How to write a good prompt: the basics behind every request here.
• How to make a Roblox game with AI: the whole path from idea to published game.
• PromptBlox vs Roblox Studio: what each one is for.