Standard Videos
Recommended: 3840 × 2160 pixels, 16:9 aspect ratio. Minimum width: 640 pixels.
FREE CREATOR TOOL
YouTube Thumbnail Checker
Check image dimensions, aspect ratio and file size before publishing. Preview your thumbnail and use the visual guide to help position important content.
Check Your Thumbnail
Select an image from your device. Processing happens locally in your browser.
JPG, JPEG, PNG, WebP and other browser-supported images · Maximum 50 MB
No account required. Images are not uploaded to our server.
Your thumbnail will appear here
Choose an image to begin.
Choose an image to begin.
Image dimensions
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Aspect ratio
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File size
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This checker measures image properties. It cannot guarantee YouTube approval, predict views or automatically judge thumbnail quality.
Recommended Image Dimensions
YouTube Shorts
Portrait artwork commonly uses a 9:16 ratio. Check YouTube's current thumbnail options for Shorts.
Podcast Playlists
Podcast playlist artwork uses a square 1:1 thumbnail. Keep artwork clear at smaller sizes.
Refer to YouTube's official thumbnail guidance for current requirements.
Frequently Asked Questions
What is the best YouTube thumbnail size?
YouTube recommends a 16:9 thumbnail for standard videos. Consult the official help page for the latest resolution and file requirements.
Can I check JPG and PNG images?
Yes. This tool supports browser-readable images, including JPG, JPEG, PNG and WebP.
Are my images uploaded to HoxTools?
No. The selected file is read locally in your browser and is not sent to our server by this tool.
Does this tool guarantee more views?
No. Correct dimensions help with technical preparation but cannot guarantee views or click-through rates.