Why check every page, not just one
Share previews are almost always generated by a theme, a CMS or an SEO plugin, not written page by page. That makes problems systematic: an og:url hard-coded to the homepage, a default share image on every product, a title template that cuts off the product name. Checking one page tells you whether that page is fine; checking the site tells you whether the template is.
The scan looks for the patterns a single check cannot show:
- Pages with no share image, which appear as text-only links in WhatsApp, Facebook and LinkedIn.
- The same image on every page, usually a site-wide fallback, so every link looks identical in a chat.
- Duplicate titles, which make different pages indistinguishable when shared.
- Share images that fail to load for crawlers, often because of hotlink protection or a CDN rule.
How the scan works
- Enter your domain. The scan reads robots.txt and your sitemap to list your pages, homepage first.
- Each page is checked like a preview crawler would: raw HTML, no JavaScript, no cookies. The share image is downloaded and measured.
- Results appear as each page finishes, with a summary of what is wrong across the site.
- Open any page to see its issues, or send it to the single-page checker for the full preview on eight apps.
Site scan questions
It reads your sitemap: first any Sitemap: lines in robots.txt, then /sitemap.xml and the other usual locations, following a sitemap index into its child sitemaps. If there is no sitemap, it uses the links on your homepage. Only pages on your own domain are checked.
The same check as the single-page Share Preview Checker: every Open Graph and Twitter Card tag, whether the share image downloads and is a usable size and format, and common mistakes such as a wrong og:url or tags outside the head.
The first 5 pages of your site, with full results, up to 3 scans a day. Any other page can be checked on its own with the single-page checker. Full-site scans of up to 100 pages, with a downloadable report, are coming soon.
It is the page people share most, and its tags are often copied to every other page by a theme. If the homepage is wrong, the rest of the site usually is too.
No. It only reads public pages, the same way the preview crawlers of WhatsApp, Facebook and LinkedIn do. Nothing is submitted or stored on your site.
The page timed out, returned an error, or blocked our request. Link-preview crawlers are usually blocked the same way, so that page is likely to share without a preview.