External Display BrowserMarch 20265 min read

How to Use Your iPhone with an External Monitor, Full Screen

Most people wire up their iPhone and end up staring at black bars on a big monitor. This guide shows you how to actually fill the whole screen, corner to corner.

You can turn any external monitor into a full desktop browser using just your iPhone. Most people try it once, see the black bars and tiny mirrored window, and give up. The setup is actually simple once you know what you need.

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The MacBook Neo showed that iPhone chips are more than capable of running a full desktop experience. Your iPhone CPU can handle it. The only thing missing was software built to take advantage of that. The External Display Browser app is exactly that.

What You Need

An iPhone supporting video output (iPhone 5 or later, see the full list below)
A Lightning to HDMI adapter for iPhone 5 through 14, or a USB-C to HDMI or USB-C to USB-C cable/hub for iPhone 15 and later
An external monitor with an HDMI port
The External Display Browser app, available on the App Store

iPhone Models Supporting Video Output

Lightning Port (iPhone 5 to 14)

iPhone 5, 5c, 5s, 6, 6 Plus, 6s, 6s Plus, SE (1st), 7, 7 Plus, 8, 8 Plus, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, SE (2nd), 12 mini, 12, 12 Pro, 12 Pro Max, 13 mini, 13, 13 Pro, 13 Pro Max, SE (3rd), 14, 14 Plus, 14 Pro, 14 Pro Max

Requires Lightning to HDMI adapter, but please check compatibility for your specific model and cable.

USB-C (iPhone 15 and later)

iPhone 15, 15 Plus, 15 Pro, 15 Pro Max, 16, 16 Plus, 16 Pro, 16 Pro Max, 17, 17 Plus, 17 Pro, 17 Pro Max, 18, 18 Pro, 18 Pro Max

Works with any USB-C to HDMI or USB-C to USB-C cable or hub. Note: iPhone Air and iPhone E models do not support video output.

External Display Browser

Full screen on any external monitor, TV or portable display. On the App Store.

Download on the App Store

Step by Step Setup

Plug your iPhone into the monitor

Connect your Lightning to HDMI adapter (or USB-C cable) from your iPhone to the monitor's HDMI port. The monitor should recognise the connection within a few seconds. Your iPhone screen will show a standard mirrored image at this point.

Download External Display Browser

Search for "External Display Browser" on the App Store, or tap the download button on this page. Install it while your iPhone is still connected to the monitor.

Open the app

Launch External Display Browser with the monitor connected. The app detects the external display automatically and outputs a full-screen landscape browser to it. No black bars, pure corner-to-corner content.

Start browsing

Type any URL into the app's address bar. Open YouTube, a news site, your work tools, anything. Everything fills the monitor at native resolution. Your iPhone stays in your hand as the controller.

Add a Bluetooth mouse and keyboard (optional)

Pair any Bluetooth mouse and keyboard with your iPhone. External Display Browser supports full cursor control, keyboard shortcuts, and the scroll wheel. It turns your monitor setup into something very close to a proper desktop.

What You Can Actually Do

Once you have the setup running, the app handles more than just basic browsing.

Watch YouTube, Netflix, Twitch and any streaming site full screen with no letterboxing
Join Zoom, Google Meet or Microsoft Teams calls with full camera and mic support
Download files directly from the browser and open PDFs as browser tabs
Use a Bluetooth mouse and keyboard for full desktop-class control
Float a browser window over other content with the floating window feature

Why Normal Screen Mirroring Does Not Work Well

Regular screen mirroring just copies your iPhone's portrait screen onto the monitor. Since the iPhone screen is tall and narrow but the monitor is wide, iOS fills the sides with thick black bars. You end up using maybe 60 percent of your screen.

External Display Browser works differently. Instead of mirroring, it renders directly to the external display in landscape at the monitor's native resolution. The iPhone screen just shows your controls. The monitor gets the full browser.

Great for a Desk Setup

If you have a USB-C hub on your desk, you can connect your iPhone to a monitor, keyboard, and mouse all at once. It becomes a genuinely usable workstation for browsing, research, calls, and document reading, all from your phone.

Works with any HDMI monitor

Any monitor with an HDMI input works, including older displays, ultrawide monitors, and 4K screens. The app adapts to whatever resolution the monitor reports and fills it correctly.

Try External Display Browser

Full screen on any external monitor, TV or portable display. No black bars. Download on the App Store.

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