Free · no Facebook login needed
Facebook link preview debugger
Facebook's own Sharing Debugger requires a developer login and only clears the cache. This reads the same tags without an account, shows the card Facebook will build, and tells you what to change — then points you at the debugger when it is time to force a refresh.
Facebook builds its link card from og:title, og:description, og:image and og:url. Use a 1200x630 image, a title under about 88 characters, and a description under about 150. Facebook caches the first scrape aggressively, so after fixing tags you must force a re-scrape in the official Sharing Debugger.
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Tags for this version
<!-- Primary --> <title>The 8 link preview mistakes costing you clicks</title> <meta name="description" content="A short field guide to the Open Graph mistakes we find on almost every marketing site, and the exact tags that fix them." /> <!-- Open Graph --> <meta property="og:type" content="website" /> <meta property="og:url" content="https://commonpoint.co/insights/social-preview-audit" /> <meta property="og:site_name" content="CommonPoint" /> <meta property="og:title" content="The 8 link preview mistakes costing you clicks" /> <meta property="og:description" content="A short field guide to the Open Graph mistakes we find on almost every marketing site, and the exact tags that fix them." /> <meta property="og:image" content="https://images.unsplash.com/photo-1551434678-e076c223a692?w=1200&h=630&fit=crop" /> <meta property="og:image:width" content="1200" /> <meta property="og:image:height" content="630" /> <meta property="og:image:alt" content="The 8 link preview mistakes costing you clicks" /> <!-- X (Twitter) --> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:title" content="The 8 link preview mistakes costing you clicks" /> <meta name="twitter:description" content="A short field guide to the Open Graph mistakes we find on almost every marketing site, and the exact tags that fix them." /> <meta name="twitter:image" content="https://images.unsplash.com/photo-1551434678-e076c223a692?w=1200&h=630&fit=crop" />
commonpoint.co
The 8 link preview mistakes costing you clicks
A short field guide to the Open Graph mistakes we find on almost every marketing site, and the exact tags that fix them.
Large card needs an image of at least 600x315; 1200x630 is ideal.
The rules that decide this card
- Facebook and Instagram share one cache
- Whatever Facebook scraped first is what both show. This is why a fixed page keeps rendering the old card until someone forces a re-scrape.
- The card shows all three fields
- Domain, headline and one line of description. Unlike LinkedIn, your og:description does get used — so it is worth writing properly.
- Headline near 60 characters
- Facebook trims longer titles, and the description is cut to a single line at roughly 155 characters on desktop and less on mobile.
- Image must clear 600x315
- Below that Facebook renders a small square thumbnail. 1200x630 gets the full-width card. Keep it under 5 MB in PNG or JPEG.
- og:url prevents split counts
- Without it, the same page shared with different campaign parameters is treated as separate links and your reaction counts fragment.
- This tool cannot clear the cache
- Only Facebook can drop its own stored copy. Fix the tags first, confirm them here, then re-scrape once — that order saves a round trip.
Quick answers
- Facebook shows an old title or image. How do I refresh it?
- Facebook caches a URL when it is first shared. Fix your tags, then run the URL through Facebook's Sharing Debugger and click Scrape Again.
- Which tags does Facebook actually read?
- og:title, og:description, og:image, og:url and og:type. Facebook falls back to your <title> when og:title is missing, but the card is weaker.
- What image works best on Facebook?
- 1200x630 at 1.91:1 for the large card. Images under 600x315 get demoted to a small square thumbnail.
- Does Facebook read twitter: tags?
- No. Facebook reads Open Graph tags only. If og: tags are missing, it guesses from the page title and first image it can find.
The tags Facebook reads
<meta property="og:type" content="website" /> <meta property="og:url" content="https://example.com/page" /> <meta property="og:site_name" content="Example" /> <meta property="og:title" content="A headline under 60 characters" /> <meta property="og:description" content="One persuasive sentence, front-loaded." /> <meta property="og:image" content="https://example.com/card.png" /> <meta property="og:image:width" content="1200" /> <meta property="og:image:height" content="630" />
When your tags are correct, press Scrape Again in the Facebook Sharing Debugger.