OG CHECKER

Check how your link looks on Facebook

Facebook invented the Open Graph protocol, so it has the most mature and strict implementation of any platform. Facebook's crawler reads og: tags to generate link preview cards in the News Feed, Messenger, and Groups. A well-optimized OG setup means your shares look professional and get more engagement.

How Facebook Renders Link Previews

When a URL is shared on Facebook, the facebookexternalhit crawler fetches the page and parses Open Graph tags:

  1. og:title — the bold card headline. Facebook recommends keeping this under 60-80 characters.
  2. og:description — supporting text below the title. Truncated at roughly 130 characters in the feed.
  3. og:image — the large card image. Facebook requires a minimum of 200x200 px but recommends 1200x630 for high-resolution displays.
  4. og:url — canonical URL. Facebook uses this to consolidate share counts across URL variations.
  5. og:type — content type (website, article, product, etc.). Affects how Facebook categorizes the link.

Facebook caches aggressively — sometimes for weeks. Use the Facebook Sharing Debugger to scrape a fresh version and see exactly what Facebook reads.

Facebook Image Requirements

Recommended Size1200x630 px
Aspect Ratio1.91:1
Max File Size8 MB
FormatsJPG, PNG, GIF, WEBP

Minimum 200x200 px (600x315 for large card). Facebook recommends 1200x630 for optimal rendering on high-DPI screens.

Facebook OG Tag Tips

  1. 1Use exactly 1200x630 px for your OG image. This is the original dimension Facebook designed for, and it renders perfectly across feed, Messenger, and Groups without any cropping.
  2. 2Always include og:url with your canonical URL. Facebook uses this to merge share/like counts across http, https, www, and non-www variants.
  3. 3Set fb:app_id in your meta tags if you have a Facebook App. This links shares to your app's analytics in the Facebook Developer dashboard.
  4. 4Keep og:title under 65 characters. Facebook truncates titles more aggressively than other platforms, especially on mobile and in Messenger previews.
  5. 5Use the Sharing Debugger after every OG change — or try our Facebook Debugger alternative for a faster workflow. Facebook's cache is extremely sticky — without explicit re-scraping, your old preview can persist for weeks.
  6. 6If your image has text, keep it under 20% of the image area. While this rule has been relaxed for ads, the algorithm may still de-prioritize text-heavy link preview images in organic posts.
  7. 7For article pages, set og:type to article and include article:published_time, article:author, and article:section for richer previews and better content categorization. Read our complete guide to Open Graph tags for the full list.
  8. 8Serve your OG image from a fast, reliable CDN. Facebook's crawler has a timeout of a few seconds — if your image takes too long to load, the preview will render without it.
  9. 9Need to check other platforms? Try our Twitter, LinkedIn, Slack, WhatsApp, or Discord checkers.

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