Free tool
Open Graph Tester
Paste any URL and see exactly how it renders when shared on Facebook, X, LinkedIn, and Slack. We pull the live HTML, parse every og:, twitter:, and standard meta tag, and flag what's missing.
What this tool checks
When you share a link, the receiving platform fetches the URL, scans the <head>, and decides what title, description, and image to show. Each platform reads slightly different tags in a slightly different priority order. This tool shows you all of them at once so you don't have to test in three different debuggers.
- Open Graph (
og:title,og:description,og:image,og:url,og:type) — used by Facebook, LinkedIn, Slack, iMessage, Discord, and most messaging apps. - Twitter Cards (
twitter:card,twitter:title,twitter:description,twitter:image) — used by X. Falls back toog:tags if absent. - Standard meta (
<title>,meta description,rel="canonical", favicon) — used by search engines and as the fallback for everything above.
FAQ
What is Open Graph?+
Open Graph is a set of <meta> tags introduced by Facebook in 2010 that tell social platforms how to render a link when it's shared. The four tags every page should have are og:title, og:description, og:image, and og:url. Without them, platforms fall back to the page's <title> and a guessed thumbnail — usually badly.
Why do my X/Twitter previews look different from Facebook?+
X reads its own twitter:* tags first and falls back to og:* if they're missing. The card style is controlled by twitter:card — summary_large_image gives you the big image card; summary gives the small thumbnail card. If you don't set it, X picks one for you.
What size should my og:image be?+
1200×630 pixels is the safe answer. Facebook recommends at least 1200×630, X wants a 2:1 ratio for summary_large_image, and LinkedIn handles 1200×627 cleanly. Keep it under 1MB so platforms don't time out fetching it.
Why does the social platform still show an old preview after I update tags?+
Each platform caches OG data per URL. Use the platform's debugger to force a re-scrape: Facebook's Sharing Debugger, X's Card Validator (now retired — post a test link from a new account), and LinkedIn's Post Inspector.
Does this tool store my URLs?+
No. Inspections are server-side fetches that return parsed metadata to your browser. We capture an aggregate event in PostHog (host only, never the full URL) so we know whether the tool is useful enough to keep building.
Tags clean? Now make sure people actually click.
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