ViewPortal - Responsive Tester

Open any URL and see it on iPhone, iPad and Mac at true device sizes — real viewports, live pixel readouts, side by side. Test responsive layouts anywhere. No tracking.

See exactly how any website looks on every device, straight from your iPhone or iPad.

ViewPortal loads any URL in a real browser engine and renders it at true device sizes, so what you see is what your visitors get. No scaled-down screenshot, no guesswork.

Type a URL. Pick a device. Done.

TRUE-TO-DEVICE VIEWPORTS

• Pages render at each device's exact width, so layouts wrap, break and reflow just like they do in real life.
• The layout viewport is forced to the real width, so media queries and breakpoints fire correctly.
• Live pixel-size readouts show the precise dimensions you are testing.

EVERY DEVICE, ONE TAP AWAY

• iPhone: SE, 17e, 17, 17 Pro, 17 Pro Max.
• iPad: mini, iPad, Pro 11", Pro 13".
• Mac: MacBook Neo, Air 13", Air 15", Pro 14", Pro 16", iMac 24".
• Faux device chrome — notch, Dynamic Island and status bar — drawn in for realistic framing.
• Flip any device between portrait and landscape.

SIDE-BY-SIDE MULTI-VIEW

• On iPad in landscape, place phone, tablet and desktop next to each other.
• Every pane loads the same URL; configure each one independently.
• Focus or go fullscreen on any pane for a closer look.

PINCH, ZOOM, EXPLORE

• Crisp pinch-to-zoom, exactly like a real browser.
• Inspect the smallest details, then step back to see the whole layout.

PREVIEW YOUR LOCAL WORK

• Point ViewPortal at localhost or a LAN dev server (such as 192.168.x.x).
• Check work in progress and catch breakpoint bugs before you ship.
• Favourites and recents keep the sites you test most a tap away.

PRIVATE BY DESIGN

• No accounts. No analytics. No tracking.
• URLs, favourites and preferences stay on your device and are never transmitted.

A clean, monochrome, ink-on-paper interface keeps the focus on your work.

Responsive design testing, wherever you are.