Open Graph Preview
See what people will see when your link is shared. The tool reads a page’s Open Graph tags, falls back to the title and description the way platforms do, and draws previews in the styles of Facebook, LinkedIn and chat apps such as WhatsApp and Slack. It then checks the image itself – loaded in your browser for its pixel size and aspect ratio, and fetched by our server for status, format and file size – and lists every og:, fb: and article: tag it found.
- Encrypted connection
- No sign-up
- Free to use
How to use Open Graph Preview
- Enter the page URL (or paste its HTML).
- Click “Preview link”.
- Compare the previews and the image checks.
- Fix the tags and refresh the platform caches.
Open Graph Preview features
Three previews
Facebook, LinkedIn and chat apps.
Image checks
Pixels, ratio, format and size.
Tag checks
title, description, image, url, type, alt.
Fallbacks shown
What platforms use instead.
All tags listed
Every Open Graph tag found.
Paste mode
Preview unpublished HTML.
When to use Open Graph Preview
- Checking blog posts before sharing.
- Fixing a missing or cropped share image.
- Reviewing landing pages for ad campaigns.
- Testing staging pages with pasted HTML.
Open Graph Preview FAQ
What image size should I use?
1200 × 630 pixels (1.91:1) works on all major platforms. Facebook requires at least 200 × 200 and accepts up to 8 MB.
Why does the platform still show the old preview?
Platforms cache previews. Use the Facebook Sharing Debugger or LinkedIn Post Inspector to fetch the page again after changing tags.
Do I need og:url?
It is recommended: it tells platforms which address to count shares for, and should match the canonical URL.
Is the preview exact?
It is a close approximation. Each platform styles cards its own way and changes them from time to time.
How link previews are built
When a link is shared, the platform fetches the page and reads its meta tags. Open Graph tags (og:title, og:description, og:image, og:url and og:type) were introduced by Facebook and are now read by almost every platform and chat app.
If a tag is missing, platforms guess: the HTML title, the meta description or a random image from the page. The guesses are often poor, which is why explicit tags matter for any page you expect to be shared.
The image is the biggest factor in whether people click. Use a sharp image at 1200 × 630 pixels, keep important content away from the edges because some apps crop it, and add og:image:alt for accessibility.
Privacy: the address you enter is fetched by our server only to run this check. The downloaded HTML is passed to your browser for analysis and is not stored, and the results are not saved on our side. Requests are rate-limited to keep the service fair for everyone, so if you check many pages in a row you may need to wait a few minutes.
Limits: pages are read up to 2 MB of HTML, redirects are followed up to eight hops and each request has a short timeout. Pages behind a login, servers that block automated requests and content added only by JavaScript cannot be analysed this way; for those, copy the page source from your browser and use the paste option where it is available.
Tip: fix the problems marked red first, because they matter most. Yellow warnings are worth reviewing but are often harmless in context, and blue notes are information. After a change, run the check again to confirm the result – search engines pick up the change on their next visit to the page.