⌕ Search Results (Desktop)
Upload a thumbnail to previewSee your image at search size.
FREE YOUTUBE THUMBNAIL TESTER See Your Thumbnail
See Your Thumbnail
Before You Publish
Preview how your thumbnail and title look in real YouTube layouts, check readability, and compare different versions.
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Private by defaultYour thumbnails stay in your browser
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No signupFree to use
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Real YouTube layoutsSearch, Home, Suggested and Mobile
YouTube Previews
See how your thumbnail and title look in different YouTube placements.
⌂ Home Feed (Desktop)
Upload a thumbnail to previewCheck the home-feed presentation.
▣ Suggested Videos
Upload a thumbnail to previewReview the suggested context.
▯ Mobile (Phone)
Upload a thumbnail to previewCheck mobile readability.
This shows approximate size and layout. Appearance may vary slightly by device and YouTube updates.
Thumbnail Checks
Objective checks based on practical thumbnail guidance.
🔒 Your thumbnail stays on your computer.PreviewClick processes your image locally in your browser. We don’t upload or store it.
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Image dimensionsUpload thumbnail to checkNeutral until an image is loaded
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Aspect ratioUpload thumbnail to checkNeutral until an image is loaded
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File sizeUpload thumbnail to checkNeutral until an image is loaded
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Title lengthUpload thumbnail to checkNeutral until an image is loaded
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Text readability (mobile)Upload thumbnail to checkNeutral until an image is loaded
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ContrastUpload thumbnail to checkNeutral until an image is loaded
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Image qualityUpload thumbnail to checkNeutral until an image is loaded
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Safe areasUpload thumbnail to checkNeutral until an image is loaded
Compare Thumbnails
Test multiple thumbnails side by side to see which one communicates best.
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Free YouTube Thumbnail Tester
PreviewClick helps you see exactly how your thumbnail and title will look before publishing. Test readability, check dimensions, and compare thumbnails in YouTube Search, Home, Suggested Videos, and Mobile layouts — all in your browser.
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Popular Guides
What size should a YouTube thumbnail be? ›
How do I test a YouTube thumbnail? ›
What makes thumbnail text readable? ›
YouTube’s A/B testing: how does it work? ›
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Helpful Resources
YouTube thumbnail size guide
Thumbnail design best practices
Title length guidelines
How to compare thumbnails