I Built a Free Safe-Area Checker for YouTube Banners (Here's What I Learned About the 2560x1440 Spec)

I Built a Free Safe-Area Checker for YouTube Banners If you have ever uploaded a YouTube banner and watched it get quietly hacked in half on mobile, this post is for you. I run a small free tool at vidthumb.co that helps creators resize YouTube thumbnails and banners. One thing came up over and over again in feedback: people would upload what they thought was a perfect banner, and three weeks later they would email me saying something was off — usually a social handle cropped out, or their schedule cut off on phones. After the third "I followed YouTube's guide, why does it look broken" email, I went and actually read YouTube's docs. Then I built a free checker. Here's what I found and what I shipped. The problem with the YouTube banner spec YouTube's official documentation says: upload 2560 x 1440 px, PNG or JPG,