Social Preview Checker

The Social Preview Checker reads the Open Graph and X (Twitter) Card metadata from a page and shows you how its link will appear when shared on social platforms, messaging apps, and chat tools. It pulls the key tags — og:title, og:description, og:image, og:url, og:type, and the twitter:card, twitter:title, twitter:description, and twitter:image equivalents — so you can confirm a shared link renders with the right headline, summary, and thumbnail instead of a blank or broken card.

Under the hood the tool fetches the page HTML and extracts the relevant meta tags from the document head, then composes a representative preview. Platforms like Facebook, LinkedIn, Slack, Discord, iMessage, and X each read these tags (with their own quirks and fallbacks) to build the rich unfurl you see when a URL is posted. Because og:image is the most visually important and most error-prone field, the checker is especially useful for catching missing images, images that are too small, or relative image paths that fail to resolve to an absolute URL.

Typical use cases include verifying a new blog post or landing page before a launch campaign, debugging why a shared link shows the wrong title or no image, and standardizing previews across a content site so every page has a deliberate title, description, and 1200x630 share image. Marketers and developers run it after deploying template changes to confirm the dynamic OG tags populate correctly across page types.

Practical tips: keep og:title under about 60 characters and og:description under roughly 160 so they aren't truncated, always use absolute https URLs for og:image, and set twitter:card to summary_large_image when you want the big-thumbnail layout. Remember that platforms cache aggressively — if you fix a tag, you may need to re-scrape the URL in the platform's own debugger to clear the old preview. Pair this with the Canonical URL Checker and Schema Markup Extractor for a complete shareability and metadata audit.