The 150 px check

Drop your game's thumbnail or icon and see it about as big as players see it on a phone.

Your image never leaves this page: no upload, no server, no cookies.

Start with your image · See the 5 checks

Your sticker sheet

Choose images

Your thumbnail, your icon, or both. Or drop them on the sheet.

16:9 thumbnail

150 px tall

thumbnail

100 px tall

icon

150 px

icon

100 px

48 px

Now find yours

The same thumbnail, 150 px tall, in a row of other games. You get about the time it takes to scroll past. Does it stop you?

yours

The gray cards stand in for other games. We don't show anyone else's art.

The 5 checks we use

0 of 5

One subject. You can name it in one word, at 150 px.
A face, or something with eyes. Faces stop the scroll. Big expression beats small detail.
Still clear in black and white. If the subject melts into the background with color off, the contrast is too low.
No small text. If there's text, 1 to 3 words you can read at 100 px. Squint to check.
Nothing your game doesn't have. Players who don't find what the thumbnail promised leave in the first minute, and Roblox now weighs that when it recommends games (Roblox, June 2026).

Want a second pair of eyes?

Send us your game link. We look at your public thumbnails and icon at 150 px and reply with 3 written notes, free. You'll talk to Guilherme, the art lead.

Ask for the free notes See packages

Adults and companies only; we never ask for keys, passwords or group access.