Preview how thumbnails and OG images will appear on YouTube, social platforms, and search engine results.
Select the image to preview as a YouTube or video thumbnail.
Type the video title to see how it appears with the thumbnail.
See how the thumbnail looks in a search result or feed.
Paste a page URL and the tool builds the preview cards that platforms will generate from your page's meta tags: the YouTube 16:9 thumbnail, Facebook's 1.91:1 share card, X's 2:1 card, and a search-result snippet with title and description. Each destination crops and scales the same image differently, so a thumbnail that looks right at full size can lose its edges, its text, or its subject on another card. The surprise most people hit: the preview is only as honest as the og:title, og:description, and og:image tags on the page. When those are missing, platforms - and the preview with them - fall back to scraped guesses.
The tool extracts og:title, og:description, og:image, and twitter: card fields from the URL you entered, then renders each platform layout from those exact values. If a tag is missing, it substitutes what the platform would scrape instead - the page's own title or a description drawn from the page content - so the preview shows what will actually be posted, not what you hoped would be.
Every destination has its own frame: YouTube cards are 1280x720 (16:9), Facebook share cards are 1200x630 (1.91:1), and X cards sit at 2:1. The preview scales the same image into each frame and shows where the crop falls. That is why the preview usually does not match the raw file you uploaded: the same edges, faces, and text end up cut differently in each card.
Because the platforms cache images. Facebook and X reuse the og:image they scraped the first time the URL was shared, sometimes for weeks, and no preview tool can override that. Open the URL in Facebook's Sharing Debugger or X's Card Validator to force a fresh scrape, then share again.
There is no single size that survives every card, because each platform frames the image differently: YouTube wants 1280x720, Facebook recommends 1200x630, and X prefers 2:1. Put the important content - faces, logos, text - in the center of the image, and check each frame in the preview.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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