3 monthly credits · No cardStart free1920 × 1080, 16:9. Here is the full spec — and a generator that outputs it.
A place file with Luau 
Icons, thumbnails, GFX Five second clips
Sky Islands3 monthly credits · No cardStart freeSky IslandsThe Roblox thumbnail size is 1920 × 1080 pixels — a 16:9 landscape image, under 20 MB, uploaded as PNG or JPG. That is the experience thumbnail: the wide image on your game's page and in search. It is not the same as the game icon, which is square at 512 × 512, and not the same as a YouTube thumbnail about your game, which is also 1920 × 1080 but is judged in a different feed. The size matters less for the upload than for the crop: Roblox scales your thumbnail down to roughly 300 pixels wide in the discovery grid, so anything smaller than about a tenth of the frame — thin text, a distant character, a fine logo — disappears at the size players actually see. Design for the small version and the large one takes care of itself.
You describe the game. Roblox AI builds the world, writes the Luau, and wires the systems — a complete, playable place, generated in minutes.
How it works
One prompt.
Type your game idea in plain English — the genre, the map, the rules. No coding required — the AI writes all the Luau for you.
The AI plans the build, writes the Luau scripts, places the parts and assembles a playable place file in minutes.
Download it, open it in Roblox Studio, and publish it from your own Studio session.
PlayableWhat it builds
Any game.
The same account generates avatar and outfit sources, classic clothing templates, UGC accessories and full characters — files you own, sized and formatted to pass Roblox upload rather than to look right in a preview.
Turn an idea into something playable to build on.
Get the avatar right without buying twice.
Design something uploadable without opening an image editor.
Make a UGC item worth publishing to the Marketplace.
Ship clothing that survives every body and animation.
Own a character nobody else can equip.
Give the game a face people click on.
Feed a channel without filming anything.
Start with 60 free credits each month. Starter is $15/month for 750 credits, Pro is $35/month for 1,900 credits and 720p video, and Max is $95/month for 5,250 credits and unlimited projects.
Try world building, images and video with 60 free credits every month. No credit card.
For creators making thumbnails and icons for their own experiences.
For creators shipping regularly. Adds 720p video and detailed 3D assets.
Best value per credit. For studios and anyone generating every day.
Credits refresh monthly with your plan. Cancel anytime.
1920 × 1080 pixels, 16:9 landscape. Upload as PNG or JPG under 20 MB. Roblox accepts other 16:9 sizes but scales them to fit, so anything smaller loses detail.
512 × 512 pixels — square, not 16:9. The icon and the thumbnail are two different images: the icon appears next to your game's name in lists, the thumbnail is the wide image on the experience page. Using one for the other gets it cropped badly.
Almost always because the source image was smaller than 1920 × 1080 and got upscaled, or because it was saved as a heavily compressed JPG. Generate or export at full size and save as PNG for flat colour and text.
Up to 10 images in the carousel on the experience page, plus the one icon. The first is what most players see, so put your strongest image there and use the rest to show gameplay.
1920 × 1080, the same as the experience thumbnail, but they compete in a different feed. YouTube thumbnails do better with a face, a strong expression and very few words; experience thumbnails do better showing the world you actually built.
Ready when you are
Your turn.
Describe an idea and generate a playable Roblox game in minutes. Start with 3 free monthly credits — no credit card and no coding required.
