Test your YouTube thumbnail before you upload
See it in real YouTube surfaces — feed, search, sidebar, mobile, Shorts — in light and dark mode. Free contrast, brightness, and blur check. No sign-up, nothing leaves your browser.
OR
62/100 chars — YouTube truncates around 70.
Upload an image or paste a YouTube URL to start
Your image stays in your browser. No sign-up.
Why preview before uploading?
A thumbnail that pops in Figma or Photoshop can disappear in the YouTube feed. Text gets clipped on mobile, the timestamp badge covers the corner, and dark UI drops the contrast of anything already dim. Testing your image in the actual layouts — feed, search, sidebar, mobile, and 9:16 Shorts — takes 15 seconds and catches the mistakes before they cost you a week of impressions.