OG image checker — see the real share card

What the OG image checker verifies

• The image actually loads — the tag can look perfect while the file 404s. This tool loads the real image, like a social crawler would, and reports the HTTP status, content type, and file size.
• Dimensions & ratio — at least 1200×630 for a sharp large card (200×200 is Facebook's hard minimum), and close to the 1.91:1 ratio X, Facebook, and LinkedIn crop to.
• Tag coverage — og:image, og:title, og:description, and twitter:card, with the fallbacks each platform applies when one is missing.
• Absolute HTTPS URL — relative or http:// image URLs break on several scrapers even though they work in your browser.

Recommended sizes per platform

One 1200×630 image (ratio 1.91:1, under 5 MB) works everywhere: X renders it as a summary_large_image card, Facebook and LinkedIn as the full-width link preview, and Slack and Discord embed it below the message. Facebook accepts images down to 200×200 but renders anything under 600 px wide as a small thumbnail; X requires at least 300×157 for the large card. Declaring og:image:width and og:image:height lets Facebook render the card correctly on the very first share, before its crawler has fetched the image.

Auditing a whole sitemap

Switch to Whole sitemap mode and enter your domain (or a sitemap URL) to audit up to 200 pages in one run. Every page's og:image and twitter:card are read, then each unique image is loaded for real — so a share image that 404s across your whole blog shows up as one red column instead of going unnoticed for months. Missing images, broken images, and under-sized images are flagged per page, and the whole table exports as CSV.

Both modes run live and store nothing. To watch the social tags on your whole site continuously — and get an email when an OG image breaks after a deploy — try siteOS. Writing tags from scratch? Start with the meta tags previewer & generator or the full meta tags checker.