YouTube thumbnail tester
Test a thumbnail the way it will actually be seen: at rail size, in grayscale, with red-green colour vision, and under the interface that covers it.
Drop a thumbnail to test it.
Drop an image here, or click to choose oneThe file stays in your browser. Nothing is uploaded.
Measured from YouTube's interface — YouTube publishes file requirements, never a layout map — these boxes come from the real interface.
This site's guidance — Not a specification: where we suggest keeping faces and text so every crop survives.
Every line below is a measurement with its method printed under it. There is no score and no predicted click-through rate: no property of an image predicts that on its own.
Drop images to add them as your thumbnails
Thumbnail tools
- YouTube thumbnail previewDrop in your thumbnail and title and read them back in a simulated Home feed, search page and suggested column, on desktop and on a phone.
- Compare YouTube thumbnailsPut two or three thumbnails side by side under the same title, in the same simulated feed, and swap their order to see which one you notice first.
- YouTube thumbnail size checkerCheck a thumbnail against YouTube's own limits before you upload it: width, height, ratio, weight and format, all measured in your browser.
- YouTube thumbnail resizerResize any image to 1280 × 720 or 3840 × 2160 without stretching it — fit it inside the frame, or fill the frame and crop the overflow.
- YouTube thumbnail compressorGet a thumbnail under YouTube's 2 MB phone limit, or any size you name, by spending quality before it ever costs you resolution.
- YouTube thumbnail cropperCrop a photo or a screenshot to a clean 16:9 thumbnail: drag to choose the part that matters, zoom in, and save it at 1280 × 720.
- YouTube title length checkerSee where each YouTube surface cuts your title off — measured by typesetting it at the real width of each column, not by counting characters.
- Compare YouTube titlesPut two or three titles side by side in the same place, against the same thumbnail, and see which survives the cut and which reads first.