LectionFree Tool

Social Share Image Checker

Check og:image and Twitter card images on any live page, then verify the URL, image dimensions, file type, and preview-readiness in one pass.

OG image checkerTwitter card image auditPreview asset QA
Free to runNo credit cardStructured results
Paste a live page URL. The checker fetches the HTML, resolves relative image URLs, and tests the declared preview assets.
Try:

Try: marketing pages, blog posts, product pages, or tool pages before you publish them.

What is a social share image checker?

A social share image checker reviews the images that a page exposes through og:image and twitter:image tags. Instead of only showing the raw metadata, it verifies whether those image URLs actually resolve, whether they stay on a healthy final URL, and whether the fetched asset dimensions match what the page claims.

This matters because broken preview images are easy to miss. A page can have a valid title and description, but if the social image is missing, blocked, oversized, or pointing at an outdated CDN path, the link preview looks weak in Slack, LinkedIn, X, or messaging apps. Teams often discover that only after the page has already been shared in a campaign or product launch.

This free social share image checker is built for practical launch QA. Paste any live URL, confirm that the Open Graph and Twitter images load cleanly, compare declared versus actual dimensions, and catch the small metadata issues that make preview cards feel unreliable.

How to use social share image checks

Start with the overall verdict, then look at the Open Graph image first. That is usually the strongest universal preview signal across LinkedIn, Slack, Discord, and many chat apps. If the tool says the image is fetchable and shows real dimensions, the preview asset itself is likely healthy.

Next, compare the declared image URL against the resolved final URL. If the page points to a redirecting CDN asset or an outdated file path, previews can become brittle even when they still load today. Declared dimensions are also worth checking. When a page states one size but serves another, preview generators have to infer the final crop instead of trusting the metadata.

Step 1

Confirm tag presence

Healthy pages usually expose an Open Graph image, and X-specific pages should usually declare twitter:card and twitter:image as well.

Step 2

Check the actual asset

A fetchable image with known width, height, and content type is much safer than a tag that points at a broken or private URL.

Step 3

Fix mismatches before launch

If declared sizes, alt text, or dedicated Twitter tags are missing, update the template before you share the URL in email, ads, or social posts.

Example: if a new blog post has an og:image tag but the asset still redirects from an old image host, the page may look fine in the browser while previews break intermittently in messaging apps. That is a small launch bug with a big surface area, and it is exactly the kind of problem this checker is meant to catch.

Common Use Cases

  • QA social preview images before publishing blog posts, landing pages, and product announcements.
  • Check whether CMS templates are emitting stale or broken Open Graph image URLs after a migration.
  • Compare Open Graph and Twitter image setups across marketing pages that should share the same brand treatment.
  • Validate campaign pages before email sends, PR outreach, or partner launches where first-share quality matters.
  • Spot missing image alt tags and tag-size mismatches before a technical SEO or content handoff.

FAQ

What does a free social share image checker test?
It fetches a live page, reads its Open Graph and Twitter image tags, resolves the image URLs, checks whether the images load, and reports actual dimensions, content type, and metadata mismatches.
Why is og:image important for link previews?
The og:image tag is the most common image signal used by social networks, chat apps, and workplace tools when they build a preview card for a shared URL.
Can a Twitter card image be different from the Open Graph image?
Yes. Many teams reuse the same asset, but some pages declare a separate twitter:image so they can control a different crop or treatment for X-specific shares.
Why would a social image checker warn about declared dimensions?
If a page declares og:image:width and og:image:height values that do not match the actual file, preview systems have to infer the real asset size instead of trusting the metadata.
What happens if the image URL redirects?
Redirects do not always break previews, but they add fragility. A cleaner setup points directly to the final image file so crawlers and preview bots do not depend on an extra hop.
Does this tool check private or localhost image URLs?
No. The checker blocks local and private addresses so it can safely inspect only publicly reachable pages and assets.

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Lection pricing

See how Lection helps collect metadata and page assets across many URLs instead of checking one page at a time.

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Need to audit social tags across more than one URL? Lection can crawl live pages, collect preview metadata at scale, and export the results for a broader content or launch QA workflow.