Social Media Test
The Social Media Test consolidates every meta tag that controls how your URL appears when shared on Facebook, X / Twitter, LinkedIn, Slack, WhatsApp, Telegram and iMessage into a single side-by-side preview. We fetch the page, validate Open Graph and Twitter Card properties, verify share images render correctly, then render the actual share-card preview each platform produces — so you catch the missing og:image or wrong twitter:card before you share, not after.
What This Tool Checks
- Open Graph tags (og:title, og:description, og:image, og:url, og:type)
- Twitter Card tags (twitter:card, twitter:title, twitter:description, twitter:image)
- Share image accessibility, MIME type, dimensions
- LinkedIn-specific og:image:width and og:image:height
- WhatsApp / Slack OG-only fallback rendering
- Pinterest Rich Pin compatibility
- Conflicts between og:* and twitter:* values
Why It Matters for SEO
Every link shared on social media or messaging is judged by its preview card. A great card with a clear image and headline can lift social CTR by 50-200%. A missing or broken card looks unprofessional, kills click-through, and reduces both direct traffic and the second-order SEO benefit (links, brand searches) that strong social shares produce. Cards must be tested before you share — most platforms cache previews aggressively, so fixing the tag after sharing requires manually flushing the cache.
How to Fix It
Add the canonical OG and Twitter quad (title, description, image, url) to every public-facing page. Use a 1200 x 630 image hosted on the same domain. Set twitter:card to summary_large_image for content. Validate every change in Facebook's Sharing Debugger and Twitter's Card Validator before publishing.
How It Works
We request the page with multiple platform user-agents (Facebook, Twitter, LinkedIn, Slack), parse the rendered <head>, fetch declared images via HEAD to verify response and dimensions, then render the resulting card in each platform's exact layout for visual confirmation.
Common Mistakes to Avoid
- No og:image at all (Facebook generates an empty card)
- og:image too small (<1200x630) - downgraded to a small thumbnail
- twitter:card unset, so Twitter falls back to a plain link with no image
- og:url omitted (Facebook treats every share as a different URL)
- OG and Twitter tags disagreeing (different titles, different images)
Quick Checklist
- og:title, og:description, og:image, og:url present
- twitter:card explicitly set
- Share image is at least 1200 x 630 px and HTTPS
- OG and Twitter values agree
- Sharing Debugger and Card Validator return no warnings