Link preview checker
See how a link will look when it is shared on Facebook, LinkedIn, X, Slack and WhatsApp, and which tags are missing.
How to use the link preview checker
- Paste the linkThe page you're about to share: a blog post, a product, a launch page.
- See the previewsHow it looks on Facebook, LinkedIn, X, Slack and WhatsApp, and which tags are missing.
- Fix the tagsAdd the missing tags to the page, then check again.
What it checks
What link previews are made of
When you paste a link into Facebook, LinkedIn, Slack or a chat, the app visits the page and reads a few tags in its code to build the preview card. Most apps use the Open Graph tags, first created by Facebook: a title, a description, an image and the page address. X reads its own twitter: tags first and falls back to Open Graph.
If the tags are missing, apps guess. You get the page title, the first words they find, and often no picture at all. A preview with a clear image and a headline gets noticeably more clicks than a bare link.
The tags to add
- og:title: the headline. Keep it under about 60 characters so it isn't cut off.
- og:description: one or two sentences, under about 155 characters.
- og:image: a full https:// address to an image of 1200 by 630 pixels, under 5 MB, as a JPG or PNG.
- og:url: the page's main address.
- twitter:card: set to summary_large_image for a large picture on X.
Most website builders, including Webflow, Framer, Squarespace, Wix, Shopify and WordPress with an SEO plugin, have fields for these in each page's settings, so you rarely need to edit code.
Why a preview doesn't update
Apps remember a link's preview for days or weeks. If you fix the tags and still see the old preview, use Facebook's Sharing Debugger, LinkedIn's Post Inspector or post the link again later. Adding a harmless parameter to the end of the address, such as ?v=2, also forces a fresh preview.
Before you share, get the page approved
A perfect preview leads people to the page, so the page needs to be right too. Send it as a review link first: your team or client clicks anything on the page to comment, and you fix it before the post goes out.
Related guides
Questions
Is the link preview checker free?
Yes. There is no signup. A fair-use limit of a few checks a minute keeps it fast for everyone.
Why does my link show no image when shared?
Usually the page has no og:image tag, or the image address doesn't load. The checker shows both. Use a full https:// address and an image of 1200 by 630 pixels.
Are these exactly how the apps will look?
They are close copies of each app's layout. Apps change their designs from time to time and may crop images slightly differently, but the title, description and image they use come from the same tags.
I fixed the tags but the old preview still shows. Why?
Apps cache previews. Use Facebook's Sharing Debugger or LinkedIn's Post Inspector to refresh, or add ?v=2 to the end of the link.
What size should a share image be?
1200 by 630 pixels works across Facebook, LinkedIn, X and Slack. Keep it under 5 MB and keep important text away from the edges.
Do you store the pages I check?
No. We read the page's tags, show you the result and keep nothing.