Responsive Test Tool
Enter any page address to see how it looks on phones, tablets and desktops, side by side, at each device's screen width.
What a responsive test checks
A responsive website changes its layout to fit the screen it is shown on. On a phone you expect one column, readable text and a menu that is easy to tap. On a desktop you expect the same content spread across the wider space. This tool loads your page at the width of real devices so you can see both at once.
Look for these problems in each frame:
- Content wider than the screen, so the page scrolls sideways.
- Text too small to read without zooming.
- Buttons and links too close together to tap.
- Images that overflow or stay tiny.
- A menu that is cut off or unreachable on a small screen.
Google indexes the mobile version of your page first, so a page that works only on a desktop can lose rankings. Fixing these problems is part of our web design services and SEO work.
Responsive test questions
What is a responsive website test?
A responsive test loads your page at the screen sizes of different devices, such as phones, tablets and desktops, so you can see how the layout changes. A responsive site rearranges and resizes its content to fit each screen, with no sideways scrolling and text that can be read without zooming.
How does this tool work?
Enter a page address and the tool opens it in a frame for each device you pick, set to that device's screen width. The page is loaded by your own browser, so what you see is how it responds to those widths. You can scroll and click inside each frame. We also read the page's head to check that it has a mobile viewport tag.
Why does it say my page cannot be shown?
Some sites tell browsers not to display them inside another page. They do it with the X-Frame-Options header or the frame-ancestors setting in their Content-Security-Policy, usually to prevent clickjacking. Banks, social networks and many shops do this. If your own site does it, that is a sensible security setting and not a responsive-design problem. To test such a page, open it in your browser, press F12 and switch on the device toolbar.
Is this the same as a real phone?
It is a close check of layout, not a replacement for a real device. The frame sets the page width, so CSS media queries respond as they would on that screen. It does not copy a phone's browser engine, touch behaviour, pixel density or on-screen keyboard, and the page still receives your desktop browser's user agent. Check important pages on a real phone before launch.
What is the viewport meta tag and why does it matter?
The viewport tag, <meta name="viewport" content="width=device-width, initial-scale=1">, tells a phone to use its real screen width. Without it, phones pretend the screen is about 980 pixels wide and shrink the page, so text is tiny. Google uses the mobile version of your page for indexing, so a missing tag can hurt both visitors and rankings. The tool reports whether your page has it.
Which screen sizes should I test?
At minimum test one small phone (about 360 to 390 pixels wide), one tablet (768 pixels) and one laptop (1280 pixels). Then drag between them with a custom size: layouts usually break between the common sizes, not on them. The sizes here are the screen widths in CSS pixels, not the physical pixel counts.
Is the tool free? Do you save the pages I test?
It is free with no sign-up. We do not save the pages you test.
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