The Banner Checker · free · runs in your browser

You designed it at 1584 × 396.Three croppers disagree.

The container crops your ratio, your own profile photo squats on the bottom-left corner, and mobile trims the edges. This checker shows your banner exactly as profiles render it, desktop and mobile, with the safe zone marked. Nothing is uploaded: the image never leaves your browser.

🖼️ Drop your banner here, paste it, or click to browse JPG, PNG, or WebP · checked against LinkedIn's 1584 × 396 recommendation and 8MB limit

The banner is one of eight checkpoints

Banner fixed? Strangers judge seven more things in their 8 seconds.

Photo, headline, About, Featured: the whole above-the-fold gets read in one skim. See the verdict a stranger walks away with.

Run the free 8-Second Test
ChecksSize, ratio, weight

Against LinkedIn's recommended 1584 × 396 (4:1) and the 8MB limit, with a blur warning for undersized images.

PreviewsDesktop + mobile crops

With the profile photo overlaid exactly where it eats your bottom-left corner.

PrivateNothing uploaded

The whole tool runs in your browser. Your image never touches a server. Check the network tab.

Quick answers

What size should a LinkedIn banner be?
1584 × 396 pixels, a 4:1 ratio, JPG or PNG under 8MB. Smaller stretches and blurs; other ratios get cropped. The part guides never tell you: the profile photo covers the bottom-left, so the real usable canvas is the upper-right two-thirds. Full breakdown: LinkedIn banner size: the full spec.
Why does my banner look cut off on mobile?
The mobile app renders the banner in a tighter container and the photo overlaps more of it. Anything hugging the edges or sitting low-left disappears for phone visitors, which is most visitors. Keep the message in the green zone above.
What should I actually put on the banner?
One readable value proposition: what you do, for whom, with proof. It's free ad space every profile visitor sees before reading a word. Full ideas with examples: LinkedIn banner ideas for founders.
Is my image uploaded anywhere?
No. This page does everything locally in your browser and makes no network request with your file. Nothing to store, nothing to leak. Details in the privacy policy.