YouTube · Thumbnail Tester

Test your thumbnail before you publish

See how your thumbnail looks in search results, sidebar, mobile feed, and end-screen — next to real competition. Runs locally, no upload.

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Recommended 1280×720

Click to replace

Title

Channel

Duration

Views

Age

Theme

01 Search result — desktop approx. 360×202 thumb

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A sample description that shows how your content sits next to other search results on YouTube…

02 Sidebar — recommended videos next to a playing video

Another video sitting next to yours

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Another video sitting next to yours

03 Mobile feed full-width on phone

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04 End-screen — small card this is how viewers see your 'next video'

previous video

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Recommended for you

05 Scale test readable at 4 sizes

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Search XL · 320px

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Sidebar · 240px

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Mobile · 168px

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End-card · 96px