Free tool

Preview your thumbnail at real sizes

Most thumbnails are designed at full size and viewed at 168 pixels wide. Check yours before it goes live.

Drop your thumbnail here, or click to browsePNG or JPG, processed on your device

What to look for: can you read the text at the sidebar size? Is there a single clear focal point? Does the thumbnail still work beside the title, or does it repeat it? If it fails at 168px, it fails in the feed.

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Templates, AI backgrounds, one-click face cutouts and 1280x720 exports — all in the browser.

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