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Free Mobile Friendly Test

Check whether a page works on a phone, with a rendered screenshot and the viewport, tap target and image checks reported separately. No sign-up required.

How to test if a page is mobile friendly

1. Enter a page URL

Any public page. The test always runs on an emulated phone, since that is the question being asked.

2. See it rendered

You get a screenshot of how the page actually draws on a phone screen, alongside the verdict.

3. Read the checks

Viewport, tap targets and image scaling reported separately, so you know which one to fix.

Google retired its Mobile-Friendly Test

If you came looking for Google's mobile friendly test, it no longer exists. Google retired the tool in December 2023, along with the Mobile Usability report in Search Console and the Mobile-Friendly Test API, on the grounds that the mobile web had matured enough not to need a dedicated checker.

Google's own suggested replacement was Lighthouse, which is what this tool runs. Any site still presenting itself as the official Google test is a third party using the name.

Worth knowing what went with it: Search Console no longer reports mobile usability at all. The nearest remaining signal is the Core Web Vitals report, which is measured on mobile by default.

What this mobile responsiveness checker looks at

Reported separately, because two of these break a page and three only degrade it.

Check	Weight	Why it matters
Viewport meta tag	Critical	Without it, phones render the page at desktop width and shrink it. Text becomes unreadable without pinching, and this alone makes a page fail.
Tap target size	Critical	Links and buttons under roughly 48 pixels, or crowded together, get mis-tapped. The most common complaint about otherwise responsive sites.
Image sizing	Secondary	Images served much larger than they display waste cellular data and slow the page, without breaking the layout.
Viewport configuration	Secondary	Whether the viewport is set up so the layout genuinely adapts, rather than only declaring that it does.
Mobile speed	Context	LCP, layout shift and blocking time under mobile emulation. A responsive page that takes eight seconds is still a bad mobile page.

Why this matters more than it used to

Google has used mobile-first indexing for every site since 2019. The mobile rendering of your page is the version that gets crawled, indexed and ranked, including on desktop results. If content is hidden or broken on mobile, that is the version Google evaluates.

This is a different claim from the usual one. Mobile friendliness is not a bonus applied to pages that pass. It is the lens through which every page is now read, which makes a broken mobile layout a content problem rather than a cosmetic one.

Speed compounds it. Core Web Vitals are measured on mobile by default, so a page that reflows correctly but takes eight seconds on a phone still fails the visitor. The tool reports both.

Frequently asked questions

Is there a Google mobile friendly test checker available?

Not any more. Google retired its Mobile-Friendly Test in December 2023, along with the Mobile Usability report in Search Console, saying the mobile web had matured enough that a dedicated tool was no longer needed. Google's own recommendation was to use Lighthouse instead, which is the engine behind the tool above.

How to test a mobile friendly website?

Enter the URL in the tool above. It loads the page on an emulated phone, checks the viewport tag, tap target sizes and image scaling, and returns a screenshot of how the page actually renders. For a second opinion, Chrome DevTools device mode lets you resize interactively, and Bing Webmaster Tools still offers a mobile friendliness test.

How to check mobile responsiveness?

Two things are worth separating. Structural checks, which a tool can automate: does the page declare a viewport, are tap targets big enough, are images scaled sensibly. And judgement, which needs eyes: does the layout still make sense, is anything cut off, is the important content still near the top. The tool handles the first and gives you a screenshot for the second.

How can I check if my website is responsive?

Run it through the tool above for the automated checks and a rendered screenshot. Then open Chrome DevTools, press the device toolbar icon, and drag the viewport width from 320 pixels upward, watching for the point where the layout breaks. Automated checks catch the structural problems, but dragging the width is how you find the awkward middle sizes.

How can I check if my website is mobile-responsive online?

The tool above needs no install and no account. It differs from most online responsive checkers in that it runs a real headless browser rather than loading your page in an iframe at a phone width, which matters because many sites refuse to load in an iframe at all and produce a blank result in those tools.

What tool can I use to check if my website is responsive?

For automated checks and a verdict, the tool above. For interactive resizing, Chrome DevTools device mode, which is free and already installed. For testing on many real devices, BrowserStack or a similar device cloud, which is paid. Start with the automated check, since it finds the structural faults fastest.

What is the best tool to check if a website is mobile friendly?

Since Google retired its own, there is no single authority. Lighthouse is the closest thing, because it is Google's engine and what Google pointed people to. The tool above runs it for you and reports the mobile-specific audits. Anything claiming to still be Google's Mobile-Friendly Test is a third-party tool using the name.

Is my website mobile-friendly on Google?

Google no longer reports this separately, since the Mobile Usability report was retired alongside the testing tool. What remains in Search Console is the Core Web Vitals report, which is measured on mobile by default and reflects real visitor data. Run the tool above for the usability checks, then check Search Console for how real users experience it.

How do I make my website mobile-friendly?

Start with the viewport tag, since nothing else works without it: a meta viewport with width=device-width and initial-scale=1. Then use CSS media queries so the layout reflows rather than scaling down. Make tap targets at least 48 pixels with spacing between them. Serve appropriately sized images. Those four cover the overwhelming majority of failures.

How do I see what my website looks like on mobile?

The tool above returns a screenshot from an emulated phone. For interactive inspection, Chrome DevTools device mode simulates specific devices and lets you scroll and click. Neither replaces looking at the site on your own phone, which is still the fastest way to notice that something feels wrong.

How to view responsive design in Chrome?

Open DevTools with F12 or Cmd+Option+I, then click the device toolbar icon in the top left of the DevTools panel, or press Cmd+Shift+M. You can pick a device preset or drag the viewport edge to any width. Throttling the network to Slow 4G in the Network tab makes the test more realistic.

How can I test a website on different devices?

Chrome DevTools device mode covers most cases by emulating viewport size, pixel ratio and user agent. It cannot reproduce real device quirks such as Safari on older iPhones, which is where a device cloud like BrowserStack earns its cost. For most sites, emulation plus your own phone catches nearly everything.

Is responsive web design still a thing?

Yes, and more so than when the term was coined. Mobile is the majority of web traffic and Google has indexed the mobile version of pages by default since 2019, so the mobile rendering of your page is the version that gets ranked. What has changed is that responsive design is now the assumed baseline rather than a feature worth advertising.

What are some examples of mobile-friendly websites?

Rather than naming sites, the pattern worth copying is consistent: a single column layout under about 600 pixels, navigation collapsed behind a menu, body text at 16 pixels or larger, generous spacing between tappable elements, and images that scale to the container. Any site you find comfortable to use on your phone is following most of these.

Does mobile friendliness affect SEO?

Yes, though not as a bonus for passing. Google uses mobile-first indexing, meaning the mobile version of your page is the one crawled and ranked. A page that renders badly on mobile is not penalised so much as evaluated in its broken state. Page experience signals including Core Web Vitals are also measured on mobile by default.

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