One image, every capsule.

Your key art

The full set for a base game. A demo and a DLC each get their own appid and their own store page, so they take the same pixel sizes — but not the same list, and not the same composition rules.

Caveats

• The corner box is our margin, not a Valve spec. Valve has moved the discount flag and the “Coming soon” banner more than once, and it renders at different proportions in different surfaces. We draw 18% × 20% in the bottom-left corner and leave the small capsule alone: at 462 × 174 a bigger box fences off a third of the art for what Steam draws as a corner flash. Treat it as “do not put the logo here”, not as a pixel-exact template.
• The safe area is a convention, not a rule. Nothing crops the inner 90%. It is the margin that stops your logo touching the edge in a grid of a hundred other capsules.
• Previews are downscaled. Very large capsules (the 3840 × 1240 library hero especially) are drawn at a fraction of true size on screen. The PNG you download is always rendered at full resolution.
• Images over 4096 px are downscaled once on load to keep the browser responsive. Export your final assets from the original file, not from this tool.
• Demo and DLC assets are the part we could not fully verify. Steamworks says a demo’s capsules and library assets must show that the app is a demo, and it lists the same pixel sizes for any app with its own store page. It does not say whether a demo or a DLC falls back to the base game’s art when you upload none, and it does not say that Steam adds a “Demo” flash of its own. So the badge here is lettering you place yourself, not a preview of something Valve draws. Upload and look at the real page.
• This is a framing check. It is not a substitute for uploading to Steamworks and looking at the real store page, which you should do before you announce anything.