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image.below-1200

Image is narrower than 1200 px. Level: Warning.

When it is raised

Raised when the card image loaded and could be measured, is at least 600 px wide and 315 px tall, and is narrower than 1200 px. It applies only when twitter:card is absent, empty or exactly summary_large_image, compared case-sensitively. Only the first twitter:card tag that has a content attribute is read; if its content is empty or whitespace, the tag counts as absent even when a later one has a value. Any other twitter:card value, including summary, player, app or a variant such as Summary_Large_Image, does not get this check. Only the width is compared with 1200.

What it does to a shared link

Facebook's image guidance gives at least 1200 × 630 px for display on high-resolution screens.

How to fix it

  1. Export the card image at 1200 × 630 px.
  2. Point og:image at the new file with an absolute https URL.
  3. If the page declares og:image:width and og:image:height, update them to 1200 and 630.
<meta property="og:image" content="https://example.com/card-1200x630.png"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="630">

Related checks

Sources