How to Make Your Mobile Site Load Faster


If you take a look through my articles, you’ll see I talk about mobile-first thinking a lot.

Why do I make such a big deal about this?

Because mobile is the reality of today’s digital world.

In fact, mobile is more important than desktop.

51.3% of all Internet usage is mobile. And that number will continue to grow in the future.

That’s why I’ve been advising my clients to focus more on mobile than on desktop, and that’s exactly what I recommend to you.

Specifically, you should focus on your mobile site.

A responsive site with unobtrusive popups is the current standard for mobile.

In addition, all of the regular website optimization best practices that apply to desktop also apply to mobile.

Today, the best practice I want to talk about is speed.

Your users expect your site to load fast. If it doesn’t, you could lose a ton of traffic.

How fast, you ask?

73% of mobile Internet browsers say they’ve encountered sites that took too long to load, and 40% abandon a site if it doesn’t load in 3 seconds or less.

Some research even suggests that if a page doesn’t load in the literal blink of an eye, people could lose interest. That’s about 400 milliseconds.

Not to mention the mighty Google takes site speed into account when indexing and ranking sites.

So if your site isn’t fast, both your audience and Google will think poorly of it. You’ll lose visibility and traffic.

So, how fast is your site?

Because if it takes longer than 2 or 3 seconds to load, you’re losing traffic right this moment.

It’s okay if your site is slow. There are steps you can take to make it faster to ensure you don’t let a single visitor slip through your fingers.

Test your site speed

Before you do anything else, you should test how fast your mobile site really is.

You might think it loads just fine, but it could be slower than you think.

One of the best mobile tests is from Think With Google:

Enter your URL into the search bar and click “Test Now.”

You’ll want to enter your regular URL and not your mobile URL if you have one (e.g.,

We’ll test because it has a lot of mobile shoppers.

The test will analyze your site using a thorough set of tests and show you how well your site performs.

This process should take about a minute or two.

Once it’s finished, you’ll see three scores:

You’ll want to pay the most attention to the first two scores: mobile friendliness and mobile speed.

Mobile friendliness reflects how easy your site is to use on mobile. It’s an overall performance metric.

Amazon has a perfect mobile friendliness score:

But what’s interesting is that it has a rather low mobile speed score. The test rates it as poor.

The site offers a free report to help diagnose any issues, and I recommend taking a look at it for tips that are specific to your site.

I’m going to address the most common causes of slow mobile sites and explain what you can do to improve yours.

Perfect your mobile site design

Think back to when you designed your site.

Did you have mobile devices in mind?

I’m guessing you didn’t. (If you did, give yourself a pat on the back.)

That’s perfectly okay if you didn’t, but now is the time to rethink your design with a mobile-first mindset.

Mobile sites have changed a lot in the last few years.

It used to be that sites would have two versions, one for mobile and one for desktop.

A mobile site is easily identified by the “m.” subdomain:

In this situation, the mobile and desktop sites are two completely different animals operating separately from one another.

Think of it like a fast-food restaurant with a drive-through. The desktop site is the main part of the restaurant, and the mobile site is the drive-through.

Often, that means the mobile site only offers a fraction of the experience the desktop version does, much like a drive-through doesn’t offer the full experience of dining in.

But you want your users to have the best mobile experience possible.

To do that, your site needs to make use of responsive design.

Responsive design allows you to have one site that dynamically changes depending on how it’s being accessed.

So your mobile and desktop users will be looking at the same site, but it will appear differently on each device.

This is actually what Google prefers. They state it quite simply: “Responsive design is Google’s recommended design pattern.”

You’re probably thinking, “Okay, cool, but what does this have to do with speed?”

Responsive designs typically load faster than mobile-only sites, so you’re gaining a massive SEO advantage there.

And if you use a responsive design, your site will get more attention in the form of social shares, which will also boost your SEO.

Making your site responsive is good for both the short term and the long term. If you don’t already have a responsive site, I recommend looking into it as soon as you can.

But responsive design is just one step toward perfecting your site.

There are a few other design aspects you need to consider.

Keep your site lightweight

It’s easy to get caught up in making the best and most eye-catching design out there.

Sometimes you get too caught up, and as a result, your site gets slower and slower because you keep adding more and more.

This is a condition that developers call code bloat.

Code bloat happens when your site gets weighed down with excess code.

Most of the time, code bloat happens when a designer is too focused on the visual presentation of a site.

Don’t get me wrong. How a site looks is extremely important.

But performance can’t take a backseat to looks.

Luckily, it doesn’t have to. You can have your cake and eat it too.

Here are some tips to keep in mind when designing your site:

Keep it simple. Leonardo da Vinci had this to say about simplicity:

Simplicity is the ultimate sophistication.

Now, about five hundred years later, his words still ring true.

Look all around you. The complex designs of the past have been replaced with the minimalist designs of the future.

This applies to websites too. Especially mobile sites.

On a mobile screen, sites can easily become too crowded, so it’s important to keep everything open and decluttered.

As a rule of thumb, you should only have one call-to-action per page. This will help you reduce the amount of code you use, and it’ll also improve your site’s user experience.

You might also want to consider a more simplistic design like this one from Rug Doctor:

It’s not flashy, but it catches your attention with its sleek style.

You don’t need lots of bright colors and photos to make your site stand out. When it comes to mobile design, less is often more.

Eliminate steps. The less your users have to do, the better.

Think about it. Why should there be 7 steps between a customer and a sale when there could be only 3?

This effectively shortens your sales funnel, but it also makes the user experience even simpler.

Lots of ecommerce sites use this strategy to increase their sales.

On Boden’s mobile site, it’s super easy to buy a product. You add it to your cart, click checkout, and pay.

It’s straightforward and to the point. There are no unnecessary steps.

This also naturally helps relieve code bloat. It’s hard to go overboard with code if you don’t have tons of pages on your site.

Cutting out unneeded steps is one of the best things you can do for your visitors. Mobile users are much more likely to stay on your site if they don’t have to do much.

Save your users a few clicks, and you’ll reap gigantic rewards.

Use fewer images. Before I get into this, I want to say that good images are definitely important for any site, and they also have SEO benefits.

However, you can have too much of a good thing.

In this case, you can go crazy with images and slow down your site in the process.

You may not think this is a big deal, but images make up roughly 63% of a page’s “weight.”

From 2011 to 2015, the size of the average mobile page tripled.

That means images are some of the most demanding elements on your site. They take up a lot of space, so having too many is not good.

One solution is to simply cut back on images.

Another (probably more practical) solution is to compress your images and reduce their file sizes.

Compression basically makes your images smaller without degrading the quality. This reduces the amount of time it takes for your site to load.

As a bonus, it also reduces the amount of time it takes for search engine bots to crawl and index your site.

Sites like can do this in a snap.

In fact, this is a best practice you should adopt even if your site is already blazing fast.

Don’t use custom fonts. I like a nice custom font as much as anyone else, but some of them are really high maintenance.

Some fonts use tons of CSS, while others go heavy on JavaScript. Either way, you’re looking at a ton of code.

If you want a really deep read on this subject, check out this post on Google’s Web Fundamentals site.

If you want the short version, here it is: Only use custom fonts when they’re absolutely necessary.

Custom fonts for headings are fine, but don’t make every font on your site a custom one.

Minify your code

Minification is a super useful technique for streamlining your code.

Here’s a quick definition of what it means to “minify” code:

Essentially, minifying your code takes out everything that’s redundant and unnecessary. It makes sure your site is only using the code it needs.

This goes a long way toward making your site lightweight.

You can minify code manually (instructions here), but if you don’t have any coding experience, it can be a little bit intimidating.

Thankfully, there are several free tools you can use to minify your code in no time at all. offers several minifying tools to let you simplify your HTML, CSS, JavaScript, and more.

If your site runs on WordPress, you have even more options thanks to plugins like Better WordPress Minify:

By using these tools, you can minify your code with just a few clicks, and you’ll be well on your way to a speedier site.

Of course, you should do all that you can to make sure there’s no unnecessary code, but mistakes happen. These tools let you fix those mistakes and improve your site at the same time.

Cut down on redirects

I love redirects. They can be really useful for SEO and user experience.

But just like code, redirects have limited uses. You can’t use redirects all over the place and expect your site to perform well.

That’s because redirects inherently slow down your site.

When you click on a normal mobile link, the server provides the document found at that link.

But a redirect means there’s no document at that particular link. Because of that, the server has to go to the page where the document lives and retrieve it.

This process has to happen with each file on a web page. That means every image, CSS file, and JavaScript file will go through the redirect.

As a result, it could be several seconds before the right page loads. By that time, your users could be long gone.

I recommend using Varvy’s Redirect Mapper to see how many redirects you have on any given page:

Then you can trace the roots of your redirects and change any that aren’t completely necessary.

This isn’t something most webmasters think about, but it can make a world of difference.

The less work your site has to do, the faster it’ll go. While redirects have a time and a place, don’t overuse them or grow dependent on them.

Load above the fold first

It’s obvious that users see above the fold content before they see anything else.

So why load your entire page all at once?

Why not load only the above the fold content at first and then load the rest as needed?

This is a concept referred to as “lazy loading,” and it can work wonders for site speed.

I bet that if you had the choice, you’d rather lift 3 pounds than 30. Am I right?

Lazy loading is that exact same concept applied to websites.

By implementing lazy loading, you’re asking your site to do only as much work as it needs to do and no more.

If you’re comfortable with code, you can use this jQuery plugin:

For WordPress sites, there are plugins like BJ Lazy Load to come to the rescue.


If neither of those options fit, you may need to hire a developer to help you out.

This is a more advanced technique, but it can save your site from doing a lot of work in the long term.


Speed isn’t just for race cars. It’s one of the most fundamental ingredients of a great mobile site.

I’ve consulted on hundreds of websites, and I always steer my clients’ attention to mobile performance.

After I help them create a more mobile-friendly site, their traffic skyrockets. Inevitably, this introduces a flood of new customers and conversions as well.

It’s no surprise. We all see people walking around with their eyes fixed on their phones or with their fingers glued to their tablets.

Mobile is here, and it’s here to stay.

Desktop performance still matters, but mobile is the present and the future.

There may be a day when desktops are treated like rotary phones or fax machines. Mobile may become the way to browse the Internet.

It’s not too hard to imagine, is it?

And if that’s really the future, you need to start preparing for it today.

So what can you do right now?

In short, make your site as fast as possible and reduce the amount of weight your site is pulling.

This Think With Google article put it perfectly: “If speed thrills, friction kills.”

Mobile users love snappy sites and dislike anything that gets in the way of that speed.

Improving your mobile site speed is a one-two punch that will make your site better for your users and for search engines.

If you haven’t focused on mobile yet, I urge you to start today.

Which of these techniques are you going to use to speed up your mobile site?