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How to test your Roblox thumbnail
- Pick the kind of image: a square game icon (512 × 512) or a landscape thumbnail (1920 × 1080).
- Drop your image in, paste it, or click to choose a file. It stays in your browser — nothing is uploaded.
- Your image is hidden at a random spot among the games most played on Roblox right now. Click it as soon as you spot it: the faster you find it, the more it stands out.
- Turn on Outline my image to compare it side by side, switch between Roblox’s dark and light themes, and press Shuffle to hide it somewhere new.
Thumbnail Tester FAQ
What size should a Roblox game icon be?
512 × 512 pixels, square. Roblox shows icons much smaller in most places, so big shapes, strong contrast and little or no small text work best.
What size should a Roblox thumbnail be?
1920 × 1080 pixels (16:9). Roblox shows thumbnails in wide game tiles and on your game’s page, so keep the important part away from the edges.
Is my image uploaded anywhere?
No. Your browser reads the image and shows it on this page only. OofWiki never receives it, and it’s gone when you close the tab.
Which games is my image compared with?
Roblox’s “Top Playing Now” chart — the games with the most players right now — refreshed every 10 minutes. Sponsored games are left out.
How do I make my thumbnail stand out?
Use a bright color that the top games around it aren’t using, one big clear subject, and a strong outline or shadow so it reads at a small size. Test it in both the dark and the light theme.