Responsive Website Tester –
Simulate Real Devices Instantly
Preview any website inside accurate desktop, laptop, iPad, iPhone, and Android frames complete with real browser chrome. Rotate, zoom, test custom sizes, and compare devices side by side — all in your browser.
Responsive Design & Device Simulator
Enter a URL, pick a device, and see exactly how your site behaves
Some websites block embedding with security headers such as X-Frame-Options or CSP — if a page stays blank, use the "Open in new tab" button or test a site you control.
Everything You Need for Real Device Testing
Go beyond a plain resize — test with authentic device frames, browser chrome, and side-by-side comparisons.
Choose from real iPhone, iPad, Android phone, tablet, laptop, and desktop viewport sizes.
iOS Safari status bars and toolbars, Android Chrome bars, and desktop browser windows for realistic previews.
View mobile, tablet, and desktop frames at once to spot layout issues across breakpoints instantly.
Flip between portrait and landscape and zoom in or out without losing device accuracy.
Type any width and height to test breakpoints that fall outside standard device presets.
The simulator loads pages directly in your browser — no server, no signup, no data stored.
How to Test Your Website's Responsiveness
Enter a URL, pick a device, and inspect the layout — switch devices anytime to keep testing.
Enter a URL
Type or paste the website address you want to test, then click Load.
Pick a Device
Choose Desktop, Laptop, Tablet, or Mobile, then select an exact model from the list.
Rotate, Zoom, or Compare
Flip orientation, zoom for detail, or switch on Compare Devices to view several sizes at once.
Fine-Tune with Custom Sizes
Enter an exact width and height to check any breakpoint your CSS targets.
Devices You Can Simulate
A cross-section of real, commonly used devices grouped by category.
| Category | Examples | Typical Viewport | Browser Chrome |
|---|---|---|---|
| Desktop | Desktop HD, Standard, Small Desktop | 1280–1920 px wide | Chrome-style window |
| Laptop | MacBook Air, MacBook Pro 14", Standard Laptop | 1366–1512 px wide | Chrome-style window |
| Tablet | iPad Mini, iPad Air, iPad Pro, Galaxy Tab | 768–1024 px wide | iOS Safari / Android Chrome |
| Mobile | iPhone SE to 15 Pro Max, Galaxy S23, Pixel 7 | 360–430 px wide | iOS Safari / Android Chrome |
Why Test with Real Device Frames?
Catch layout issues before your users do, without needing a drawer full of physical devices.
See exactly where text wraps oddly, images overflow, or navigation collapses incorrectly.
View mobile, tablet, and desktop together instead of resizing one browser window repeatedly.
Preview iPhone and iPad viewports without owning Apple hardware, or Android phones without every model.
Switch devices in one click instead of juggling browser dev tools presets manually.
Punch in the precise pixel width your media query targets and confirm it behaves as intended.
Pages load straight into your browser tab — nothing is proxied, logged, or stored on a server.
Frequently Asked Questions
Everything you need to know about the Responsive Website Tester on Web Tool Ocean.
How does the responsive website tester work?
Why does a site refuse to load inside the simulator?
Can I test a custom screen size instead of a preset device?
Can I compare multiple devices at the same time?
Is this simulator free to use?
Does this replace real device testing?
Why Use Our Responsive Tester?
Built for developers who need a fast, believable device preview without installing anything.
Instant Preview
Load any URL into a realistic device frame in seconds, right in your browser tab.
100% Private & Secure
Nothing you test is uploaded, proxied, or stored on any server.
Real Comparison View
Check mobile, tablet, and desktop layouts together instead of one at a time.
Accurate Device Chrome
iOS Safari and Android Chrome bars make previews feel like the real thing.
Custom Breakpoints
Test any exact pixel width and height beyond standard device presets.
Free Forever
No subscriptions, no trials, and no limits — just a free responsive tester for developers.
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