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The number of people doing their internet browsing on a mobile device has skyrocketed since the release of the iPhone in 2007. So much so that according to a study by Morgan Stanley analysts mobile browsing will eclipse desktop browsing by 2015. Despite this, the takeup on responsive web design has been relatively slow. I wanted to graph these two trends to show that there is an enormous opportunity for businesses to get ahead of their competitors in this growing market. I also decided to include mobile specific sites with responsive sites as one large mobile optimised category.

There are many sites that measure browsing statistics; Using statcounter we see that 32.8% of all browsing is done on mobile devices. The data is measured slightly differently from site to site, but they all give similar results.

How many mobile optimised sites are there?

Surprisingly it iss much harder to find out the percentage of mobile optimised sites on the internet.  One article I came across suggested that 1 in 8 websites are responsive in December 2013 based on the top 10000 trafficked websites. Another found that 15% of websites are fully responsive in February 2014 based on the websites of the Fortune 1000 websites.

I found a comment for this quora question by a Brad Einarsen that gave me the direction to head in. Brad used a search engine called meanpath that crawls the web and captures the outputted code of websites. Meanpath provide a sample size of 115,635,665 websites in their 29th of September 2014 index which is more than large enough for us to deduce trends about the whole internet which consists of about 276,000,000 domain names registered globally.

Brad used meanpath to measure the number of websites with a CSS media query measuring max screen width. A CSS media query is a smoking gun for a responsive web site. It is the most common method for detecting the size of a screen and modifying the layout of the page accordingly.

meanpath web technologies research logo

It is possible to make a website responsive without using a media query though this is not common. The alternative solutions use javascript to achieve the desired result. Reponsejs, css3-mediaqueries-js, Freewall, enquire.js and Simple State Manager are libraries I found that do the job. I included them in the search. To account for custom JavaScript coding I included sites with code related to screen resizing. This includes sites with the code .resize( and window.onresize.

To find websites specifically designed for mobile we can analyse domain names commonly used for mobile sites. The most common convention is to assign the mobile site to a subdomain with m at the front (in the form Additionally any website which uses the .mobi domain name (in the form must be built for mobile.  We can also include the .mobile domain name. Domain names aren’t the only way to spot mobile specific sites. We can also include sites which use the jquery mobile library. This library can also be used in responsive sites but is mostly used in mobile specific websites.

Let’s put all that into a blender and see what we get.

Meanpath queries used to assess the number of mobile optimised sites
Description Meanpath Query # of Sites % of Sites
Mobile Only Sites
sites with .mobi subdomain name (domain:*.mobi OR redirect:*.mobi) NOT ( OR OR domain:mobi* OR redirect:mobi*) 583500 0.50
sites with an m. subdomain namedomain:*.m.* OR redirect:*.m.* OR domain:m.* OR redirect:m.* 340631 0.29
sites with .mobile domain name (domain:*.mobile OR redirect:*.mobile) NOT ( OR OR domain:mobile* OR redirect:mobile*) 329 0.00
sites that use the jQuery Mobile library “” 94025 0.08
All mobile only sites ((domain:*.mobi OR redirect:*.mobi) NOT ( OR OR domain:mobi* OR redirect:mobi*)) OR domain:*.m.* OR redirect:*.m.* OR domain:m.* OR redirect:m.* OR (domain:*.mobile OR redirect:*.mobile) NOT ( OR OR domain:mobile* OR redirect:mobile*) OR “” 994337 0.86
Responsive Sites
Sites with a media query “media max-width:”~8 OR “media min-width:”~8 4570431 3.95
Sites where JavaScript is triggered by the screen resizing “window.onresize” OR “(window).resize” 1452167 1.26
Check for responsive JavaScript libraries “responsivejs” OR “css3-mediaqueries-js” OR “Freewall.js” OR “ssm.addStates” OR “enquire.js” 24802 0.02
All responsive sites “media max-width:”~8 OR “media min-width:”~8 OR “window.onresize” OR “(window).resize” OR “responsivejs” OR “css3-mediaqueries-js” OR “Freewall.js” OR “ssm.addStates” OR “enquire.js” 5803160 5.02
Combined Responsive and Mobile Only Sites
All Mobile Optimised Sites “media max-width:”~8 OR “media min-width:”~8 OR “window.onresize” OR “(window).resize” OR “responsivejs” OR “css3-mediaqueries-js” OR “Freewall.js” OR “ssm.addStates” OR “enquire.js” OR ((domain:*.mobi OR redirect:*.mobi) NOT ( OR OR domain:mobi* OR redirect:mobi*)) OR domain:*.m.* OR redirect:*.m.* OR domain:m.* OR redirect:m.* OR (domain:*.mobile OR redirect:*.mobile) NOT ( OR OR domain:mobile* OR redirect:mobile*) OR “” 6697401 5.79

The results were obtained with the meanpath queries detailed in the table above.


Apparently almost 6% of all websites are mobile optimised. My search is forgiving and the actual proportion will be lower. Even an optimistic 6% is nowhere near the 33% of browsing done on mobile devices. Therefore there exists a significant mobile market which your competitors are probably not exploiting.

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