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Thumbnail A/B Tester
Preview how your thumbnail and title will look on YouTube.
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YouTube
No Image
10:05
This is a placeholder for your awesome video title to see how it fits
Your Channel ✓
1.2M views • 2 hours ago
About Thumbnail A/B Tester
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What is this tool?
A visual testing tool that lets you preview exactly how your YouTube thumbnail and title will look in real-world scenarios (Mobile, Desktop, and Dark Mode) before you publish.
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How to use the tool?
1. Upload your designed thumbnail. 2. Type in your proposed video title. 3. The tool will simulate the YouTube homepage UI. 4. See if your text gets cut off on mobile or if the thumbnail stands out.
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Why preview your thumbnail?
YouTube cuts off long titles on mobile devices, and the timestamp indicator often covers the bottom right corner of your thumbnail. Previewing ensures your most important text and faces are fully visible.