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WhatsApp link preview: tags, image size and cache refresh

Crawler: WhatsApp/2.x

WhatsApp uses og:title, og:description and og:image. Previews are generated when the link is typed or pasted, so if the page is slow or the image is heavy, users may get no preview.

Tips

• Keep og:image small: a compressed JPEG of a few hundred KB loads most reliably.
• Use an absolute https URL.
• There's no refresh tool. Changes show up for new shares after WhatsApp's cache expires, or immediately with a variant URL.

Minimum tags that work everywhere

<meta property="og:title" content="Page title">
<meta property="og:description" content="One or two sentences.">
<meta property="og:image" content="https://example.com/og/page.png">
<meta property="og:url" content="https://example.com/page">
<meta property="og:type" content="website">
<meta name="twitter:card" content="summary_large_image">

Paste your URL into the previewer to see an approximate WhatsApp card and a list of problems.

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