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Open Graph checker
Paste a URL and see the card Facebook, X, LinkedIn, WhatsApp, Slack and Discord will each build from your tags, plus every og: and twitter: problem worth fixing.
Meta tag report
OG image size and text limits by platform
One image at 1200×630, PNG or JPEG, under 1 MB over https satisfies every row below.
| Platform | og:image | Title | Description | Reads |
|---|---|---|---|---|
| 1200×630 · max 8 MB | ~88 desktop, ~66 mobile | ~200 desktop, ~110 mobile | og:, then <title> and meta description | |
| X (Twitter) | 1200×628 · max 5 MB | ~70 | hidden on the large card | twitter:, then og: |
| 1200×627 · max 5 MB | ~119, 2 lines shown | not shown in the feed | og: only, ignores twitter: | |
| min 300×200 · under ~600 KB for the big card | ~65 | ~150 | og: | |
| Slack | any, sits under the text at 360px | full title | ~3 lines | og:, plus og:site_name as the eyebrow |
| Discord | 1200×630 · max 8 MB | 256 | 350, about 4 lines | og:, plus theme-color |
The tags worth having
Open Graph has dozens of properties. Almost nobody needs more than these.
<!-- Covers every platform in the table -->
<title>Your page title, under 60 characters</title>
<meta name="description" content="What this page is, in about 150 characters.">
<meta property="og:type" content="website">
<meta property="og:site_name" content="Your Brand">
<meta property="og:title" content="Your headline, under 60 characters">
<meta property="og:description" content="One or two sentences, 50-200 characters.">
<meta property="og:image" content="https://example.com/og.png">
<meta property="og:image:alt" content="What the image shows.">
<meta property="og:url" content="https://example.com/page">
<meta name="twitter:card" content="summary_large_image">
Questions
What does an Open Graph tester check?+
It fetches your page the way a social crawler does, reads the og: and twitter: tags out of the HTML, and draws the card each platform builds from them. Browsers hide these mistakes: a relative og:image path, a 400px image or a description that dies mid-word all look fine until someone shares the link.
Is there still a Twitter card validator?+
Not a working one. Twitter dropped the Card Validator's visual preview in August 2022 and the tool itself stopped working at some point after, which is how most people end up here. This reads twitter:card, twitter:title, twitter:description and twitter:image, applies X's fallback to your og: tags where those are missing, and draws both the wide and the small card. Only twitter:card is worth setting by hand; X reads og: for the rest.
Can this replace the Facebook Sharing Debugger?+
For reading your tags, yes, across five more platforms in one pass. It can't clear Facebook's cache, though. Fix the tags here, then run the URL through Facebook's debugger once and press Scrape Again.
Why does LinkedIn still show my old preview?+
LinkedIn caches a URL's preview and nothing you change on the page clears it. Confirm the tags here, then paste the URL into LinkedIn's Post Inspector to force a re-crawl. Posts already published keep the old card.
What size should an og:image be?+
1200×630, which is 1.91:1, PNG or JPEG over https, and under 1 MB. Below 600px wide Facebook and LinkedIn drop to a small square thumbnail; below 200px on a side Facebook refuses it. File-size ceilings differ, so keep it under 5 MB if one image has to work everywhere.
Why is my link preview missing its image?+
Usually og:image is a relative path rather than a full https:// URL. After that: the image sits behind auth or a bot filter, it's an SVG, or the platform cached an older version of the page. The report above says which.
The card is fixed. Someone still has to write the next one.
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