Open Graph Debugger
Preview how a URL appears when shared and validate its Open Graph and Twitter card tags.
About this tool
Enter a URL to see how it will look when shared on social platforms and chat apps, plus the raw Open Graph and Twitter card tags the page exposes. The page is fetched server-side with a crawler user-agent, so you see what Facebook, X, Slack, and others actually receive — bypassing the CORS limits a pure browser fetch would hit.
Missing or malformed tags (no og:image, a relative image URL, a missing twitter:card) are flagged so you can fix link previews before launch.
Frequently asked questions
Why does my preview here differ from Slack or Facebook?+
Those platforms cache aggressively. After fixing tags, use the platform’s own cache reset (Facebook Sharing Debugger “Scrape Again”, etc.) to force a refresh — this tool always fetches live.
Why does og:image need an absolute URL?+
Crawlers fetch the image out of the page context, so a relative path like /og.png has no host to resolve against. Always use a full https:// URL.
My site returns nothing — why?+
Some sites block non-browser user-agents or render meta tags only with client-side JavaScript, which crawlers (and this tool) do not execute. OG tags should be in the server-rendered HTML.
What image size should og:image be?+
1200×630 (1.91:1) is the safe default across platforms, with a 5MB ceiling. Smaller than 600×315 and many platforms show a small thumbnail instead of a large card.