Roblox Thumbnail & Icon Generator
Pick a genre and get 3 thumbnails and a game icon sized to Roblox specs.
Enter your game name and a one-line hook, then choose a genre preset such as Simulator, Obby or Tycoon. You do not have to write a prompt: the set comes out in three compositions, a character close-up, an action moment and a world-scale shot. The total credit cost of the set is shown before you generate.
What it makes
Thumbnail set (3 variants)
Three 16:9, 1920x1080 thumbnails in different compositions. Roblox starts personalizing thumbnails when 2 to 5 are active, so the kit works in sets.
Game icon
One 512x512 icon with a bold silhouette and 2-3 dominant colors, built to still read at about 150 px.
3D props (GLB)
Generate 3D models from text or an image with a Roblox style preset and download them as GLB files for your Blender or Studio workflow.
Roblox spec checklist
- Thumbnails - 16:9, 1920x1080, under 3 MB, up to 10 per experience
- Personalization - Roblox starts personalizing when 2 to 5 thumbnails are active
- Bottom zone - Home cards cover the bottom with the title and rating. The kit shades that zone so you can keep it clear
- Icon - 512x512, must still read at about 150 px
- Video thumbnails - Must be real gameplay, so this tool does not offer AI video
How it works
- 1
Enter your game and pick a genre
Add the game name, a one-line hook and a genre preset. Optionally upload a gameplay screenshot as a reference.
- 2
Check the cost, generate the set
See the summed credits for 3 thumbnails and 1 icon, then generate. Failed generations are refunded.
- 3
Validate and download
Check the size, the under-3-MB file size, the bottom zone, the 150 px icon and the Home preview, then download the files.
FAQ
How many thumbnails do I get?
One set is 3 thumbnails (character close-up, action moment, world scale) and 1 icon. You can regenerate any single asset.
Does the output match Roblox specs?
Thumbnails are fitted to 1920x1080 and icons to 512x512, and the file size is checked against the 3 MB limit. If the model output is smaller it is scaled up, and the result view shows the original size.
Can I use a gameplay screenshot as a reference?
Yes. Upload one screenshot and the art follows your game's look and avatar style. It is optional.
Can it make AI video thumbnails?
No. Roblox video thumbnails must be real gameplay, so this tool focuses on image thumbnails and icons.
What if the text in the image is wrong?
AI can misspell text. Turn off the option to put the game name in the art and add the title yourself, or regenerate. Always proofread before uploading.
How much does it cost?
The total credit cost of the set is shown before you generate. Signing up gives 35 credits once, with no card required.
gwanggo is not affiliated with Roblox Corporation. Roblox is a trademark of Roblox Corporation.