What is Lazy Loading and How to Enable It on Shopify

Key Takeaways

✅ Lazy loading delays the loading of images until a visitor scrolls down to see them

✅ It can reduce your initial page load time by 30 to 60 percent on image heavy pages

✅ Google counts lazy loading as a positive signal for Core Web Vitals (LCP and FID)

✅ Most modern Shopify themes already have lazy loading built in

✅ You can enable lazy loading on Shopify without touching any code using apps

✅ Never lazy load above the fold images as it slows down the first visible experience

✅ Lazy loading works best when combined with image compression and WebP format ✅ Enabling lazy loading is one of the fastest and easiest speed wins available to any Shopify store owner

You have probably heard the phrase lazy loading thrown around when people talk about website speed. But what does it actually mean? And more importantly, how do you use it to make your Shopify store faster?

Table Of Contents

What is Lazy Loading?
Why Lazy Loading Matters for Your Shopify Store
Lazy Loading: Before and After Your Shopify Store
How to Check if Lazy Loading is Already Enabled on Your Shopify Store
How to Enable Lazy Loading on Shopify (3 Methods)
What You Should NEVER Lazy Load
Lazy Loading Best Practices for Shopify
Lazy Loading Enablement Checklist
Frequently Asked Questions (FAQ)
Final Thoughts: Lazy Loading is One of the Easiest Speed Wins on Shopify

In this guide we are going to break it all down in plain English. No technical jargon. No confusing developer talk. Just a clear explanation of what lazy loading is, why it matters for your store, and step by step instructions for enabling it on Shopify in 2026.

Whether you run a small boutique store or a large eCommerce catalog with thousands of products, lazy loading is one of the simplest and most impactful things you can do to improve your store speed and your customer experience.

Let us get started.

What is Lazy Loading?

Imagine you walk into a library and ask for every single book at once. The librarian would need to go and collect thousands of books before you could start reading even one. That would take forever.

Now imagine you ask the librarian to bring you books one section at a time as you walk through each aisle. You get what you need exactly when you need it. That is the idea behind lazy loading.

In the context of websites and Shopify stores, lazy loading is a technique that delays the loading of images and other media until the user actually scrolls down to see them.

By default, when a visitor lands on your Shopify store, their browser tries to download every single image on the page all at once, even the ones buried at the bottom that nobody has scrolled to yet. With lazy loading enabled, the browser only loads the images currently visible on screen. The rest are loaded on demand as the visitor scrolls down.

Quick Definition Lazy Loading = loading images only when they enter the viewport (the visible part of the screen). The opposite is Eager Loading = loading all images immediately when the page opens, regardless of whether the user sees them.

Why Lazy Loading Matters for Your Shopify Store

Lazy loading is not just a technical trick. It has real, measurable business benefits for your store. Here is why it matters:

1. Faster Initial Page Load

When a visitor first opens your store, the browser only needs to load the images currently on screen instead of all the images on the page. This drastically reduces how much data needs to be downloaded upfront, which means your page becomes interactive much faster.

For a collection page with 48 product images, lazy loading means the browser loads only the first 8 to 12 images that are visible. The other 36 images load later as the customer scrolls. This can cut your initial page load time by 30 to 60 percent on image heavy pages.

2. Better Mobile Performance

Mobile users are particularly sensitive to slow loading pages. They are often on slower mobile data connections and have less processing power than desktop computers. Lazy loading is especially impactful on mobile because it reduces both the amount of data downloaded and the processing work needed to render the page.

Since Google uses mobile first indexing, your mobile speed directly affects your search rankings. To understand the full picture of Shopify speed optimization, check out our guide: How to Improve Shopify Store Speed: 10 Proven Optimization Tips

3. Improved Core Web Vitals Scores

Google measures your store using Core Web Vitals, which are a set of performance metrics that determine how good your page experience is. Lazy loading directly improves two of the most important metrics:

LCP (Largest Contentful Paint): Lazy loading reduces the amount of work the browser does during initial load, which can improve your LCP score
INP (Interaction to Next Paint): Less loading work upfront means the browser is more responsive to user interactions from the start

4. Reduced Bandwidth Usage

Many visitors browse stores without scrolling all the way to the bottom. With traditional eager loading, their browser downloads images they never even see. Lazy loading ensures you only serve images that customers actually view, reducing unnecessary bandwidth costs for both your store and your customers.

5. Higher Conversion Rates

Research from Google shows that a one second improvement in page load time can increase conversions by up to 27 percent on mobile. A faster first impression keeps visitors on your store longer and moves them through the buying journey more smoothly.

Lazy Loading: Before and After Your Shopify Store

Here is a practical look at how lazy loading changes the numbers for a typical Shopify collection page:

Metric	Without Lazy Loading	With Lazy Loading
Initial Images Loaded	All 48 product images	First 8 to 12 visible images
Initial Data Downloaded	3.2 MB to 5.8 MB	0.6 MB to 1.2 MB
Time to Interactive	4.5 to 7 seconds	1.8 to 3 seconds
LCP Score	Poor (above 4 seconds)	Good (under 2.5 seconds)
Mobile Speed Score	30 to 45	65 to 80
Bandwidth Saved	0 percent	40 to 70 percent

Note: These figures are approximate averages based on typical Shopify collection pages. Results vary based on image size, theme, and number of products.

👉 Lazy loading works best when your images are already properly optimised. If your images are still large and uncompressed, lazy loading will help but will not fix everything. Read our complete guide: How to Optimize Images for Shopify (Formats, Compression and Lazy Loading)

How to Check if Lazy Loading is Already Enabled on Your Shopify Store

Before enabling lazy loading, check whether your Shopify theme already has it built in. Here is how to do it quickly:

Method 1: Use Google Chrome DevTools

Open your Shopify store in Google Chrome
Right click anywhere on the page and select Inspect
Click the Network tab at the top of the DevTools panel
Reload the page by pressing Ctrl plus R (Windows) or Cmd plus R (Mac)
Watch the Network tab as you scroll down the page
If new image requests appear in the Network tab as you scroll, lazy loading is working
If all images load immediately on page open without any scrolling, lazy loading is NOT enabled

Method 2: Check Your Theme Code

In your Shopify Admin, go to Online Store then Themes, then click Edit Code. Open your theme.liquid or product template files and search for the text loading=”lazy”. If you find it on image tags, your theme already supports lazy loading.

Method 3: Run a PageSpeed Insights Test

Go to pagespeed.web.dev and enter your store URL. In the Opportunities section, look for Defer offscreen images. If this appears as a recommendation, lazy loading is not yet enabled on your store.

How to Enable Lazy Loading on Shopify (3 Methods)

There are three ways to enable lazy loading on Shopify. We have listed them from easiest to most advanced:

Method 1: Use a Modern Shopify Theme (Easiest)

The easiest way to get lazy loading is to use a modern Shopify theme that already has it built in. Shopify’s free Dawn theme, which was released in 2021 and has been regularly updated, includes native lazy loading out of the box. Other modern premium themes like Impulse, Prestige, and Pipeline also include lazy loading by default.

To check if your theme supports lazy loading, look in the theme documentation or contact the theme developer. If your current theme is more than three or four years old and has not been updated, it is worth considering an upgrade just for the performance benefits alone.

✅ Best for: Stores willing to switch or upgrade their theme
✅ Difficulty: Easy
✅ Cost: Free (for Dawn) or the cost of a premium theme

Method 2: Use a Shopify App (No Code Required)

If you do not want to change your theme, a Shopify app is the next easiest option. Several popular apps can enable lazy loading on your store without any code editing:

App Name	What It Does
TinyIMG	Enables lazy loading alongside image compression and WebP conversion
Swift	One click lazy loading enable with before and after speed score
Hyperspeed	Advanced lazy loading with script deferral and CDN
Booster SEO	Lazy loading as part of a full speed and SEO optimization suite
Plug In Speed	Granular lazy loading control per page type

To install any of these apps, go to the Shopify App Store, search for the app name, click Add App, and follow the setup instructions. Most apps will enable lazy loading automatically once installed.

✅ Best for: Store owners who want results without touching code
✅ Difficulty: Very easy
✅ Cost: Free plans available for most apps

Method 3: Add loading equals lazy to Your Theme Code (Advanced)

If you are comfortable editing Shopify Liquid code, you can add lazy loading manually by adding loading=”lazy” to image tags in your theme files. This is the native HTML5 method and is supported by all modern browsers including Chrome, Firefox, Safari and Edge.

Code Example Find this in your theme files: <img src=”{{ product.featured_image | img_url: ‘800x’ }}” alt=”{{ product.title }}”> Change it to: <img src=”{{ product.featured_image | img_url: ‘800x’ }}” alt=”{{ product.title }}” loading=”lazy”> That single attribute is all it takes to enable native lazy loading on that image.

The most common files to update are product.liquid, collection.liquid, and any template files that display images in a loop. Always back up your theme before making any code changes.

✅ Best for: Developers or store owners comfortable with Liquid code
✅ Difficulty: Intermediate
✅ Cost: Free

What You Should NEVER Lazy Load

This is one of the most important points in this entire guide. Not all images should be lazy loaded. There is one critical rule you must follow:

Critical Rule: Never Lazy Load Above the Fold Images Above the fold images are the images visible on screen without any scrolling. These include your hero banner, the first product image on a collection page, and your logo. If you lazy load these images, your visitor will land on your page and see blank empty spaces where images should be. The images will then load a moment later, causing the page to jump and shift (this is called layout shift and it kills your CLS score). Only lazy load images that are BELOW the fold. Images above the fold should always load immediately (eagerly).

Lazy Loading Best Practices for Shopify

Follow these best practices to get the maximum benefit from lazy loading on your Shopify store:

Always set width and height attributes on your image tags. This lets the browser reserve the correct space before the image loads and prevents layout shift (CLS)
Combine lazy loading with a CDN. Shopify already delivers images through a CDN but pairing lazy loading with CDN delivery gives you the best of both worlds
Use WebP format for all images. WebP files are 25 to 35 percent smaller than JPEG and load even faster when combined with lazy loading
Clean up unused app scripts before enabling lazy loading. Leftover scripts from deleted apps can interfere with lazy loading performance
Test on real mobile devices after enabling. Use your phone on a 4G or 5G connection to confirm the improvement feels real
Always run a PageSpeed Insights test before and after to measure the actual improvement in numbers
Re check your lazy loading setup after every theme update. Theme updates can sometimes overwrite your code changes

👉 Did you know that leftover scripts from deleted apps can seriously impact your speed improvements? Before enabling lazy loading, read our full guide on cleaning up your store: How to Remove Unused Apps and Scripts from Your Shopify Store

Lazy Loading Enablement Checklist

Use this checklist to make sure you have set up lazy loading correctly on your Shopify store:

☑️ Check if your current theme already supports lazy loading
☑️ Run a PageSpeed Insights test and note your current score
☑️ Choose your method: theme, app, or manual code
☑️ Back up your theme before making any code changes
☑️ Enable lazy loading on all below the fold images
☑️ Confirm that above the fold hero images are NOT lazy loaded
☑️ Add width and height attributes to all images to prevent layout shift
☑️ Compress all images with TinyPNG or an optimization app
☑️ Convert images to WebP format if possible
☑️ Run a PageSpeed Insights test after enabling and compare scores
☑️ Test on mobile to confirm the improvement feels real

Frequently Asked Questions (FAQ)

What is lazy loading in Shopify and how does it work?

Lazy loading in Shopify is a technique that delays the loading of images and other media until they enter the visitor’s viewport (the visible area of the screen). Instead of loading all images on a page when it first opens, the browser loads only the images currently visible. As the visitor scrolls down, additional images are loaded in real time. This reduces the initial data download and makes your store feel much faster to visitors, especially on mobile devices.

Does Shopify support lazy loading natively?

Yes, Shopify supports native browser lazy loading through the HTML5 loading=”lazy” attribute. Modern Shopify themes like Dawn already include this attribute on image tags. However, older themes may not have this enabled, and some themes only apply it to certain images. That is why it is worth checking your specific theme and using an app or code update if needed.

Will lazy loading break my Shopify store or theme?

When implemented correctly, lazy loading will not break your store or theme. The only risk is if lazy loading is applied incorrectly to above the fold images, which can cause blank spaces and layout shift on initial page load. Always exclude hero banners and the first visible images from lazy loading. If you use an app, the app handles this automatically. If you edit code manually, always test thoroughly on both desktop and mobile after making changes.

How much can lazy loading improve my Shopify speed score?

The improvement varies depending on how many images are on your pages and how large they are. For collection pages with many product images, lazy loading can improve your Google PageSpeed score by 10 to 25 points and cut your LCP time by one to three seconds. The improvement is more dramatic on pages with lots of images and less noticeable on pages with only a few. Combining lazy loading with image compression gives you the best overall result.

Can I enable lazy loading on Shopify without any coding?

Absolutely. The easiest no code option is to use an app like TinyIMG or Swift, which enable lazy loading automatically when you install them. Another option is to switch to a modern Shopify theme like Dawn, which has lazy loading built in by default. Both options require zero code editing and can be set up in minutes.

Does lazy loading affect SEO on Shopify?

Yes, in a positive way. Lazy loading improves your Core Web Vitals scores, particularly LCP and CLS, which Google uses as ranking signals. Googlebot also supports lazy loading and can crawl lazy loaded images as long as you are using the standard HTML loading=”lazy” attribute or a JavaScript based solution that Googlebot can render. The overall SEO impact of lazy loading is positive because it leads to faster pages and better user experience metrics.

Does lazy loading work on Shopify product pages as well as collection pages?

Yes, lazy loading can and should be applied to product pages too, especially for stores that display multiple product images in a gallery, size guides, lifestyle photos, and user generated content. On product pages, the main featured image above the fold should load immediately, while all secondary images in the gallery below can be lazy loaded. This is standard practice and gives you a good balance of fast initial load and smooth scrolling experience.

Final Thoughts: Lazy Loading is One of the Easiest Speed Wins on Shopify

Lazy loading is not some complicated developer trick reserved for big enterprise stores. It is a simple, proven technique that any Shopify store owner can implement today, with or without coding skills.

Whether you use a modern theme with it built in, install an app that does it automatically, or add a single attribute to your image tags, the result is the same: faster page loads, better Google rankings, improved Core Web Vitals scores, and a smoother shopping experience for your customers.

The best part? It is free to implement and takes only a few minutes to set up.

Start with a PageSpeed Insights test right now to see where your store stands. Then choose the method that best fits your comfort level and get lazy loading working for you today.

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