Upload thumbnail and title
Upload your thumbnail image and type your video title.
SOCIAL MEDIA TOOLS · FREE ONLINE TOOL
YouTube Thumbnail Preview
See your thumbnail at real YouTube sizes before you publishYour thumbnail looks stunning full screen in your design app. Nobody will ever see it that way. Preview it at the real sizes YouTube uses across search, suggested videos and mobile feeds, and judge it exactly as viewers will.
// YOUTUBE THUMBNAIL PREVIEW · GET STARTED
Use YouTube Thumbnail Preview
See your thumbnail at real YouTube sizes before you publish
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50 / 100 characters
Search result (desktop)
128K views · 3 days ago
Your Channel
Home feed
Your Channel
128K views · 3 days ago
Up next sidebar (smallest size)
Your Channel
128K views · 3 days ago
Can you still read the thumbnail text at the sidebar size? If not, increase the font size or cut words before you publish.
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How to use the YouTube Thumbnail Preview
Preview every layout
Review it in the search, home feed and sidebar mock layouts.
Fix and publish
Check the small sizes, fix weak text, and publish with confidence.
// YOUTUBE THUMBNAIL PREVIEW · ABOUT THIS TOOL
About the YouTube Thumbnail Preview
Thumbnails win or lose the click at sizes far smaller than your design canvas. This tool places your image and title inside faithful mocks of the three placements that matter: desktop search results, the home feed grid, and the up-next sidebar.
Everything renders locally from the file you choose. Spot unreadable text, covered faces, and cramped titles before the video goes live.
Where it helps most
The final gate before a thumbnail goes public.
Gate client work
Designers use it as the final gate before handing a thumbnail to a client or creator, catching unreadable text while it is cheap to fix.
A/B test concepts
Creators A/B test two concepts by previewing both side by side at real sizes instead of guessing which one reads better.
Design mobile-first
The habit it builds is the valuable part: thumbnails that survive the tiny preview almost always look great everywhere else.
Fit upload routine
It fits naturally into any upload routine and takes under a minute, so there is no reason to skip the check.
What to check
The two things that decide whether a thumbnail gets the click.
Text legibility
The check that matters most is text legibility: if you cannot read the words at the smallest size, make them bigger or cut them entirely.
Focal point survival
The same pass reveals whether your focal point survives shrinking and whether the colors still pop when the image is centimeters wide.
Real display sizes
YouTube shows thumbnails around 360 pixels in search, 168 in the suggested sidebar, and small on mobile feeds; judge at those sizes.
YouTube Thumbnail Preview: private by design
The preview is entirely local and cosmetic. Nothing is uploaded to YouTube and your video is untouched.
YouTube Thumbnail Preview FAQs
They are displayed much smaller than your design file, so fine detail collapses. The preview shows your thumbnail at real display sizes, which reveals whether text and focal points survive shrinking before you upload.