How do I test a website on iPhone online?

Paste your URL into the bar above and pick an iPhone model — iPhone 14, 15, 16, or 17 in standard or Pro Max. The site renders inside a real device frame at the correct pixel dimensions, so what you see is exactly what an iPhone user would see in Safari.

Is this a free iPhone simulator?

Yes — completely free, no sign-up, no install. We render any URL inside accurate iPhone, Pixel, iPad, and Samsung frames in your browser. Real Safari device emulation requires Xcode on a Mac; this is the next-best zero-friction option for everyday responsive testing.

What is the live HUD overlay?

The HUD paints live viewport size and DPR, current Tailwind breakpoint, the safe-area outline, an 8px baseline grid, and Steven Hoober's thumb-reach heatmap on top of the device frame. Toggle each layer on or off from the sidebar.

Can I screenshot the device with the HUD overlays?

Yes. The PNG export captures the entire frame including any HUD overlays you have enabled — perfect for design QA tickets, client presentations, and Slack/Linear comments.

Why does some content not load in the preview?

Some sites block iframe embedding via X-Frame-Options or Content-Security-Policy headers as an anti-clickjacking measure. Test those flows directly in your phone's browser or use Safari's Responsive Design Mode on a Mac.

iPhone Simulator Online — Free Responsive Design Tester

Mobile HUD Previewer is a free, browser-based responsive design tester and mobile website tester. Paste any URL and see it rendered inside a real iPhone, Pixel, iPad, or Samsung device frame at the manufacturer's actual pixel dimensions. No sign-up, no install, no tracking — everything runs in your browser.

On top of every preview, a live HUD shows the current viewport size, the matching Tailwind breakpoint, the device's safe-area outline, and Steven Hoober's thumb-reach comfort zones — so you can check both layout and ergonomics in one glance.

Who this mobile website tester is built for

Designers — See your Figma-to-code translation at the exact viewport. Snap a PNG with the HUD on for design QA tickets.
Developers — Catch breakpoint flips and safe-area regressions in seconds, without spinning up a real device.
Product managers — Check what your customers see on their phones before greenlighting a release. Share a link with the team.
Marketers — Preview landing pages, email captures, and ad funnels in real device frames before launching paid traffic.

Mobile website tester for responsive design QA

A mobile website tester lets teams validate layout, safe-area handling, and breakpoint behaviour across real device dimensions before deploying. Unlike browser DevTools, which emulate CSS pixels without a device frame context, this mobile website tester renders inside accurate hardware frames — iPhone 14 through 17, Pixel 7, Galaxy S23, iPad Air, iPad Pro, and Surface Pro — so you see precisely what your users see.

Supported devices

Sixteen devices: iPhone 14, 15, 16, 17 (each with Pro Max variant), Google Pixel 7, Samsung Galaxy S23, iPad Air, iPad Pro 11", iPad Pro 13", Microsoft Surface Pro, and a Custom Size option. Each frame uses the manufacturer's actual CSS pixel dimensions.

Common questions

How do I test a website on iPhone online?: Paste your URL into the bar above and pick an iPhone model. The site renders inside a real device frame at the correct pixel dimensions — exactly what an iPhone user would see in Safari.
Is this a free iPhone simulator?: Yes — completely free, no sign-up, no install. Real Safari device emulation requires Xcode on a Mac; this is the next-best zero-friction option for everyday responsive testing.
What is the live HUD overlay?: The HUD paints live viewport size and DPR, current Tailwind breakpoint, the safe-area outline, an 8px baseline grid, and Steven Hoober's thumb-reach heatmap on top of the device frame.
Can I screenshot the device with the HUD overlays?: Yes. PNG export captures the entire frame including any HUD overlays — perfect for design QA tickets and Slack/Linear comments.
Why does some content not load in the preview?: Sites that block iframe embedding via X-Frame-Options or Content-Security-Policy headers cannot be embedded. Test those flows directly in your phone's browser.

Also building MCP servers? Try the MCP Inspector Online — explore any public MCP server's tools, resources, and prompts in your browser, no install required.