Shopify Speed Optimisation
Improve your Shopify store's loading speed, mobile performance and responsiveness.
Why Shopify stores become slow.
A theme changes as a business grows. You add apps, custom features and integrations. Each change makes sense on its own, and the effect builds up over time.
We investigate what’s slowing your store down, optimise your existing theme and measure the improvements. From unnecessary scripts and inefficient code to images and third-party integrations, we focus on the changes that make a practical difference.
Apps and third-party scripts
Apps, tracking tools and integrations can add extra requests and JavaScript. We review what loads, where it loads and how it affects performance.
Images and media
Large images, video banners and incorrect loading priorities can delay visible content. We optimise how media is delivered and loaded across devices.
Theme code
Liquid, JavaScript and CSS all affect storefront performance. Liquid builds the page on Shopify’s servers, while JavaScript and CSS run in the visitor’s browser. We review rendering, unnecessary code and inefficient functionality.
Storefront interactions
Menus, product variants, filters and the cart should respond quickly. We investigate interactions that feel sluggish or delay customer actions.
Our Shopify speed optimisation process.
01 — Performance audit
We review your important pages, including the homepage, collections and product pages. We use PageSpeed Insights, Lighthouse, Chrome DevTools and the real-user data in Shopify’s Web Performance dashboard to understand loading, responsiveness and visual stability. The audit identifies issues, their likely impact and recommended priorities.
02 — Theme optimisation
We implement the agreed improvements. Depending on the findings, the work may include:
- Optimising image loading and responsive image sizes
- Improving how JavaScript loads and runs
- Reviewing apps and third-party scripts
- Removing unnecessary CSS and JavaScript
- Improving theme rendering
- Fixing layout shifts
- Making interactive features respond faster
Theme code changes are developed and tested on a duplicate theme before anything is published.
03 — Testing and results
We test the changes, compare performance under consistent conditions and check that existing functionality still works. You get clear before-and-after measurements and a summary of the completed improvements.
Lab tests such as Lighthouse and PageSpeed Insights show the effect straight away. Real-user Core Web Vitals data is collected over a rolling 28-day window, so it takes several weeks to reflect the changes.
What you get.
- A detailed performance audit with prioritised recommendations.
- A clear scope and fixed-price quote for the agreed optimisation work.
- Improvements made to your existing Shopify theme.
- Before-and-after performance measurements.
- A summary of completed changes and further recommendations.
Looking for practical improvements you can make yourself? Read our guide to speeding up your Shopify store.
How much does Shopify speed optimisation cost?
Every store has a different setup. The cost depends on your theme, installed apps, custom functionality and the issues we find.
We start with a scoped, paid performance audit, quoted upfront.
Once the audit is complete, you get a fixed-price proposal for the agreed improvements, including the scope and expected delivery timeline.
Shopify speed optimisation, answered.
Can you improve my Shopify store's speed without changing its design?
Yes. Many optimisations happen inside the existing theme, in how images, scripts and styles load, and they keep its appearance. If a change would affect the look, we agree it with you first.
Do you optimise Shopify Plus stores?
Yes. Plus changes what's available at checkout and in the back office, but storefront speed still comes down to theme code, media and integrations, which is where we work.
Can faster loading help with SEO?
Core Web Vitals are part of Google's page experience signals, and Google uses them in ranking alongside relevance and content quality. A faster store is also easier for customers to use, so we treat speed as one part of the wider picture.
How do you measure improvements?
We run controlled before-and-after tests on the same pages, devices and settings using Lighthouse, PageSpeed Insights and Chrome DevTools. Where your store has enough traffic, we add real-user data from Shopify and Google's Chrome UX Report.
How long does Shopify speed optimisation take?
It depends on the audit findings and the agreed scope. You get a timeline with the fixed-price proposal before work starts.
Let's improve your Shopify store's performance.
Send us your Shopify store URL and tell us what you’d like to improve. We’ll discuss your current setup and the best place to start.