About MyThumbTester

MyThumbTester is built and maintained by MyThumbTester to help creators preview a thumbnail together with a video title before publishing.

What the tool does

Choose an image, enter a title and optional video details, and switch between home feed, search, watch page, Shorts, mobile and sidebar previews. You can download the selected preview as a PNG.

What a preview can tell you

Use the layouts to inspect cropping, readability and the relationship between your image and title. The previews are illustrative approximations. This tool does not run audience experiments, measure click-through rates or promise better performance.

Local image processing

The tool reads your chosen image inside your browser and draws the preview locally. It does not upload that image to our servers.

MyThumbTester is independent and is not affiliated with, sponsored by or endorsed by YouTube or Google. Product names belong to their respective owners.