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Open Graph Checker & Social Preview Tool
See how a URL or private HTML may appear in Google and social apps. Find missing tags, edit the preview, and generate the fix.
- Live URL or private HTML
- Six useful previews
- Ready-to-copy tags
Live URL checks read public page metadata. Pasted and uploaded HTML stays in your browser until you choose to publish.
Quick answer
What does this tool check?
This free social preview checker reads a page title, description, canonical URL, Open Graph image, and Twitter Card tags. It then creates helpful Google, LinkedIn, X, WhatsApp, Slack, and Discord simulations so you can catch a missing image or weak message before sharing the page.
Three simple steps
Check, improve, and publish
No browser extension, code setup, or account is required to check a page.
- 01
Add the page
Enter a live URL, paste the complete HTML, or choose an HTML file.
- 02
Check every preview
Review Google, LinkedIn, X, WhatsApp, Slack, and Discord cards.
- 03
Fix and publish
Edit the fields, copy the tags, or apply them to your HTML and publish.
Metadata checklist
The fields behind a good link preview
The checker keeps the report focused. Every warning explains one useful change.
Page title
The title Google and browser tabs can use.
Meta description
The short summary that may appear in search.
Open Graph tags
The title, description, image, URL, and page type used by many apps.
Twitter Card tags
The metadata X uses for a richer shared link.
Social image
Whether a share image is present and uses a public URL.
Canonical URL
The preferred public address for the page.
Useful, not absolute
Why a live card can still look different
Social platforms use their own layouts, fallback rules, and stored copies. This tool shows what your metadata supports; it cannot control every final crop or rewrite.
Cached previews
An app may keep an older title or image after you update the page.
Different crops
Keep important content near the center of the social image.
Crawler access
The image and page must be publicly reachable over HTTPS.
Good to know
Social preview checker FAQ
What is an Open Graph checker?
An Open Graph checker reads the metadata in a web page head and shows how the page may look when its link is shared. It checks fields such as og:title, og:description, og:image, and og:url.
Can I check HTML before the website is live?
Yes. Paste the complete HTML page or choose an HTML file. The file is read in your browser, so you can check and edit its metadata before publishing it.
Which social previews can I check?
The tool shows helpful simulations for LinkedIn, X, WhatsApp, Slack, and Discord, plus a Google search preview. Each platform may crop, cache, or rewrite a live preview differently.
Why is my social preview image missing?
Common causes include a missing og:image tag, a relative or private image address, an image blocked from public access, or an old preview stored in the social platform cache.
What size should an Open Graph image be?
A 1200 by 630 pixel image is a widely supported starting point. Keep important text and logos away from the edges because platforms crop images differently.
Does Open Graph improve Google rankings?
Open Graph tags mainly control social link previews; they are not a direct promise of higher Google rankings. A clear title, useful description, strong page content, crawlability, and links still matter for search.
Can GeminiLaunch add the generated tags for me?
Yes for pasted or uploaded HTML. Choose Apply tags and publish free. The tool replaces the matching title and social tags, then sends the updated page to the existing GeminiLaunch publishing flow.
Need a broader launch check? Use the AI website checker. Ready to publish one page? Open HTML to website. For a longer explanation, read the Open Graph guide.
Check your page
Use a public URL or check private HTML before publishing.