Social Share Preview Checker
Wondering how your link will look when shared? Paste any URL to see live Facebook, LinkedIn, X and iMessage/Slack previews, every Open Graph tag we found, your og:image size, and the exact tags to fix.
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What Open Graph tags are and why they matter
The card behind every shared link
Open Graph tags tell Facebook, LinkedIn, X, Slack and WhatsApp which title, summary and image to show. Without them, platforms guess — often badly.
They decide whether people click
A large, sharp image card gets far more clicks than a bare URL. Fixing these tags is one of the quickest wins for social traffic.
The 3 tags that matter most
og:title
<meta property="og:title" …>The headline on the card. Keep it under about 60 characters so it isn't cut off.
og:description
<meta property="og:description" …>One or two sentences (110–160 characters) that make people want to open the link.
og:image
<meta property="og:image" …>An absolute https URL to a 1200×630 image. This is the biggest factor in how the card looks.
Correct image dimensions for each platform
1200 × 630 (1.91:1)Minimum 600×315 for a large card; smaller images show as a thumbnail.
1200 × 627 (1.91:1)Same shape as Facebook; LinkedIn caches for about a week — use Post Inspector to refresh.
X / Twitter
1200 × 628 · under 5 MBNeeds twitter:card=summary_large_image; the summary card crops to a square.
WhatsApp, iMessage, Slack
1200 × 630 · under ~600 KBKeep the file small — WhatsApp silently drops large images.
Going further: run a full audit with our SEO analyzer, check every tag with the meta tag analyzer, or read what your digital footprint reveals.
Frequently Asked Questions
What is an Open Graph tag?+
An Open Graph tag is a meta tag in a page's HTML head, such as og:title, og:description and og:image, that tells social networks and chat apps what title, summary and image to show when someone shares the link. The protocol was created by Facebook and is now read by LinkedIn, X, Slack, WhatsApp, iMessage and Discord.
Why does my link preview show the wrong image?+
Usually because og:image is missing, so the platform picks a random image from the page, or because the platform cached an older version. Set an absolute https og:image URL of at least 1200×630px, then force a refresh with Facebook's Sharing Debugger or LinkedIn's Post Inspector; X refreshes its cache on its own within about a week.
What size should my og:image be?+
Use 1200×630 pixels, a 1.91:1 ratio, as a JPG or PNG under roughly 1 MB. That size displays sharply on Facebook, LinkedIn and X large cards. Images smaller than 600×315 may be shown as a small thumbnail, and very large files can be skipped entirely by WhatsApp.
Why isn't Twitter showing my custom preview?+
X needs a twitter:card meta tag, ideally summary_large_image, to show a big image card. Without it you get a small card or a bare link. Also check the image is publicly reachable, under 5 MB, and not blocked by robots.txt, because X's crawler must be able to download it.
Do I need separate tags for Twitter and Facebook?+
Mostly no. X falls back to og:title, og:description and og:image when the twitter: versions are missing, so one set of Open Graph tags covers both. You only need to add twitter:card, which has no Open Graph equivalent, plus twitter: tags if you want different wording on X.