What size is a LinkedIn video thumbnail?

A LinkedIn video thumbnail matches the video's frame. For the recommended 16:9 landscape video that is 1920 by 1080 pixels, and for square video 1080 by 1080. Upload a custom thumbnail at the same dimensions so it is not stretched or cropped.

What is the LinkedIn link preview image size?

When you share a URL, LinkedIn pulls the page's Open Graph image. The recommended OG image is 1200 by 627 pixels, a 1.91:1 ratio. Below about 200 by 200 pixels LinkedIn shows a small square thumbnail instead of a large card.

What size should a LinkedIn document carousel be?

Document carousels render best as square pages at 1080 by 1080 pixels or portrait 1080 by 1350. Export your PDF at one of these sizes so text stays sharp in the in-feed viewer on both desktop and mobile.

What file formats does LinkedIn accept for images?

LinkedIn accepts JPG, PNG, and GIF for images, with PNG best for graphics and text overlays and JPG best for photos. Shared images can be up to 8 MB, and video thumbnails should be JPG or PNG within the same limit.

Why does my LinkedIn link preview show a tiny image?

LinkedIn only shows the large landscape card when the page's Open Graph image is at least roughly 1200 by 627 pixels. Smaller or missing OG images fall back to a small square thumbnail, which gets far less attention in the feed.

LinkedIn Thumbnail Size Tool

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A thumbnail is the first and sometimes only thing a scroller sees, so a mis-sized one that LinkedIn stretches or shrinks costs you clicks before anyone reads a word. This tool lists the exact recommended dimensions, aspect ratios, and file limits for every LinkedIn content type that has a preview image.

How it works

Each LinkedIn content type has a preview container with a recommended export size. The tool stores the official figures per type:

video thumbnail   = 1920 × 1080  (16:9, JPG/PNG)
link OG image     = 1200 × 627   (1.91:1, large card)
document carousel = 1080 × 1080  (1:1) or 1080 × 1350 (4:5)
single image post = 1200 × 1200  (1:1) up to 1200 × 1500 (4:5)

The aspect ratio is width ÷ height; matching it on export prevents LinkedIn from adding letterbox bars or cropping your subject.

Tips and limits

For shared links, the preview image comes from your page’s Open Graph tag, so control the thumbnail by setting a 1200 by 627 OG image on the destination page — anything smaller collapses into a tiny square card. Keep all images under the 8 MB ceiling, use PNG when there is text or a logo so it stays crisp, and prefer the portrait 4:5 ratio for in-feed posts because it occupies more vertical space on mobile and earns more attention.