Open Graph preview

How to use it

1. Enter the page URL, title and description.
2. Enter an absolute image URL, ideally 1200 × 630 pixels.
3. Check the three previews as you type.
4. Copy the Open Graph and Twitter tags into your page’s head.

Which tag each surface reads

Facebook, LinkedIn, Slack, WhatsApp and iMessage read the Open Graph tags — og:title, og:description, og:image and og:url. X reads its own twitter:* tags first and falls back to Open Graph when they are missing, so the block above includes both. Google reads neither for its result: the title comes from <title> and the snippet from the description meta tag or, when Google prefers its own choice, from the page text. That is why the search preview can only be an estimate.

The image is what makes or breaks it

The image is most of what people see of a shared link. Make it 1200 × 630 pixels (1.91:1), under about 5 MB, served over https from an absolute URL — a relative path like /share.jpg works in your HTML but not in a crawler that saw the tag out of context, which is why the generated tag is always absolute. If the previews show no image, the URL you gave could not be loaded from here, and a crawler will fail the same way.

Why this page does not fetch your URL

The previews are built from what you type, not from the live page. Reading a site’s existing tags from here would mean Sellstamp making a request to any address a visitor names, and doing that safely rules out plain http and redirects — which is how a large share of real sites answer. Rather than a checker that fails on ordinary URLs, this is one that shows you what a given set of tags produces. To see what your live page has now, view its source and search for og:; to test what a crawler sees after you deploy, the platforms’ own debuggers (Facebook’s Sharing Debugger, LinkedIn’s Post Inspector) fetch the page and also clear their caches, which nothing else can do.