What are the correct dimensions for a single LinkedIn image post?

Dimensions and file size are two separate constraints that both affect how sharp an image looks once it's live, and treating them as one setting is where most posts go wrong. The pixel dimensions (1200×1500 or 1200×1200) determine how much detail is available before any compression happens. The file size determines how much of that detail survives LinkedIn's upload pipeline, which re-compresses every image to keep its platform fast — a bloated, uncompressed export at the right dimensions can still come out blurry if LinkedIn has to compress it aggressively to bring it under its own internal thresholds.

The practical target is exporting at the correct pixel dimensions using a moderate JPG compression setting (roughly 80-85% quality) yourself, before upload. This produces a file typically in the 500KB-2MB range that's already efficiently compressed, so LinkedIn's own compression pass has little extra work to do and the visible quality loss is minimal. Uploading a 10-15MB uncompressed PNG at the same dimensions doesn't get you a sharper result — it just shifts more of the compression work onto LinkedIn's servers, where you have no control over the settings.

PNG is worth using specifically for images with flat colors, text, or logos, where its lossless compression avoids the slight blur JPG can introduce around sharp edges. Photographic images compress more efficiently as JPG without a visible quality difference.

Another common mistake is exporting in an Adobe RGB or CMYK profile carried over from print design software — LinkedIn expects standard sRGB, and a different profile can leave colors looking washed out or shifted once uploaded, even though the file looks correct on your own screen. CarouseLabs generates images at the correct dimensions and sRGB color profile automatically, so that's one less setting to get wrong.

Key Points

• 1200×1500px (4:5) or 1200×1200px (1:1) are the two reliable dimension choices
• Stay under LinkedIn's 5MB upload cap, ideally targeting 500KB–2MB
• Pre-compress at 80-85% JPG quality so LinkedIn's own compression has less to do
• Use PNG for text/logo-heavy graphics, JPG for photographic content

Example

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