Why does my header look different on my phone than on my computer?

The platform shows the same file at a much smaller size on a phone, lays the phone's status bar, camera cutout and your profile photo over it, and sometimes crops it to a different shape. Each of those changes what is visible.

Is checking on my own phone enough?

No. Your phone is one screen size and one cutout. Your audience uses many, and a header that clears your phone can still collide with a Dynamic Island, a larger avatar or a TV-safe crop elsewhere.

Which platforms crop the most?

YouTube crops hardest: the 2560 × 1440 channel art shows only a central strip on phones and desktops. X and LinkedIn mostly keep their shape but are covered by the avatar and the phone's status bar.

How do I make one header that works everywhere?

Keep important content in the middle band, away from the top edge and the avatar corner, and use type large enough to survive being shown at a quarter of its size. Then preview it on several device profiles before publishing.

Explainer

Why Your Header Looks Different on Your Phone

The same banner file renders four different ways on a phone, a tablet, a laptop and a TV. The three causes, and the one check that catches all of them.

By Ian MacCallum · Published October 20, 2026

You exported one file. You uploaded one file. Yet the header on your laptop, your phone and your friend's phone are three different pictures. That is not a bug in your design tool or a compression problem. Every platform takes your single image and renders it through a different window on every screen, and three things decide what shows through that window.

1. Scale: the phone shows it far smaller

A desktop browser gives your banner room. A phone gives it the width of the screen, around 400 points. A 1500 px X header and a 1584 px LinkedIn banner are both shown at roughly a quarter of the size you designed them at. Detail that was crisp on a 27 inch monitor turns into noise, and small text disappears long before anything covers it.

What to do: design for the phone first. Fewer words, bigger type, stronger contrast. If a line needs squinting at 25% zoom in your design tool, it will not be read in the app.

2. Overlays: the interface sits on top

Platforms and phones both draw over your header:

Your profile photo overlaps the lower left on X and LinkedIn, and a square logo tile does the same on LinkedIn Pages.
The status bar (time, signal, battery) covers the top strip when a profile opens inside the app.
The Dynamic Island on recent iPhones blacks out a pill in the top centre.
Buttons and names such as Follow, Subscribe and your display name crowd the bottom edge on phones.

None of these show up in your design file, which is why a header can look perfect in Canva and broken on a phone.

3. Cropping: some platforms change the shape

X and LinkedIn mostly keep their frame. YouTube does not: its 2560 × 1440 channel art shows the full image only on TVs, and phones and desktops see a narrow central strip. Facebook covers shift between the app and the browser. If your important content is not inside the area every device shows, someone loses it.

Why checking on your own phone is not enough

It is the obvious test, and it catches one screen. Your audience is spread across small and large iPhones with and without the Dynamic Island, Android phones with punch-hole cameras, tablets, 1080p and 1440p monitors, and for YouTube, TVs. A header that clears your phone can still collide with an overlay on the next one.

A layout that survives most screens

Keep the top band free of text and logos.
Leave the avatar corner, usually lower left, for colour only.
Put the message in the middle band, right of centre on X and LinkedIn.
On YouTube, keep everything inside the central safe area.
Use type big enough to read at a quarter of its size.

Platform-specific fixes

X header cut off on iPhone: the Dynamic Island and avatar zones in pixels.
LinkedIn banner cut off on mobile: the safe band on a 1584 × 396 canvas.
YouTube banner size guide: the strip phones and desktops actually show.
Every header size in one directory.

Or skip the reading: the free header checker renders your file on phone, tablet and desktop profiles at once and marks every overlay.

Frequently asked questions

Why does my header look different on my phone than on my computer?: The platform shows the same file at a much smaller size on a phone, lays the phone's status bar, camera cutout and your profile photo over it, and sometimes crops it to a different shape. Each of those changes what is visible.
Is checking on my own phone enough?: No. Your phone is one screen size and one cutout. Your audience uses many, and a header that clears your phone can still collide with a Dynamic Island, a larger avatar or a TV-safe crop elsewhere.
Which platforms crop the most?: YouTube crops hardest: the 2560 × 1440 channel art shows only a central strip on phones and desktops. X and LinkedIn mostly keep their shape but are covered by the avatar and the phone's status bar.
How do I make one header that works everywhere?: Keep important content in the middle band, away from the top edge and the avatar corner, and use type large enough to survive being shown at a quarter of its size. Then preview it on several device profiles before publishing.

See what your header loses on every device

Upload your banner and see what every phone, tablet and desktop crops, in your browser.

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