Why Does Ad Creative Resolution Matter?
When an ad creative falls below a platform's recommended resolution, it gets stretched to fill the display and ends up looking blurry or pixelated. On Retina and 4K screens this is even more obvious, and it can hurt both click-through rate and brand trust. On the other hand, uploading an unnecessarily large file slows down loading and can cost you impressions, so matching each platform's recommended size is the safest approach.
Every platform has its own resolution, ratio, and format requirements. Instagram and Facebook favor square (1:1) and vertical (4:5, 9:16) creatives for mobile feeds, while the Google Display Network relies on standard banner sizes like 728×90 and 300×250. YouTube thumbnails should be 1280×720 at a 16:9 ratio, and regional platforms like Naver GFA and Kakao Biz Board each have their own specs.
Select a platform above to see the recommended pixel dimensions, ratio, accepted file formats, and maximum file size at a glance. Since specs change periodically, it's a good idea to double-check the latest requirements in each platform's ads manager before uploading.
Frequently Asked Questions
It gets stretched and looks blurry or pixelated, especially on high-density displays.
Yes, limits vary by platform — always check the current limit in the ads manager.
1:1 and 4:5 work well in feeds; full-screen placements like Stories require 9:16.