Social platforms want a 1200×630 image under ~1 MB. Paste a page URL (or a direct image URL) — we fetch the og:image and check its real dimensions, weight and aspect ratio.
An og:image checker fetches the image declared in a page's og:image meta tag and reports its real pixel dimensions, file weight, and aspect ratio, comparing them against the 1200×630 / 1.91:1 standard. The og:image is the thumbnail that renders when your URL is shared or cited on social platforms, in chat apps, and increasingly in AI answer surfaces — a wrong size, oversized file, or off-ratio image gets cropped, blurred, or dropped entirely.
1200×630 pixels at a 1.91:1 aspect ratio is the recommended size — it fills a large link preview on Facebook, LinkedIn, X and most chat apps without cropping. The practical minimum for a large card is 600×315.
Keep it under 8 MB, which is Facebook's hard cap, and ideally under 1 MB. Heavy images load slowly and some scrapers time out and skip them.
Common causes are a missing or relative og:image URL, an image below 200×200 px, a file over the platform's size limit, or a stale cache. Confirm the tag resolves to an absolute URL and re-scrape the link with the platform's sharing debugger.
1.91:1 (landscape) is the standard for large summary cards, while square 1:1 suits smaller thumbnails. Off-ratio images get center-cropped and can lose text or the main subject.
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