Why Open Graph matters
When someone shares your URL on Facebook, Twitter, LinkedIn, or Slack, the platform reads your Open Graph (and Twitter Card) meta tags to generate a preview card. Without proper OG tags, platforms may show a broken or generic preview — leading to lower engagement.
Key tags: og:title, og:description, og:image (1200×630px recommended), og:url, twitter:card.
More tools
Meta Tag Analyzer
Full meta tag audit for any URL.
Heading Checker
Analyze H1-H6 hierarchy.
SERP Preview
Google snippet with pixel counter.
FAQ
What is the ideal OG image size?+
1200×630 pixels for Facebook and LinkedIn. Twitter uses 1200×628 for summary_large_image cards. Keep file size under 5MB.
Why doesn't my image show?+
Common causes: relative URL instead of absolute, image blocked by robots.txt, HTTP instead of HTTPS, incorrect MIME type, or the image is too large.
Check OG tags on every page
Lumina shows a live OG preview with image dimensions and all social tags — on every page you visit.
Add Lumina to Chrome — Free