JavaScript is the biggest performance bottleneck on most Shopify stores. We minify, defer and restructure JS loading to drastically cut Time to Interactive and improve both PageSpeed scores and real-world user experience.
We run a full Lighthouse and Core Web Vitals audit to benchmark your store and pinpoint every performance bottleneck.
Every issue ranked by impact. We share a clear plan before touching a single line of code so you know exactly what will change.
Our engineers implement fixes: image compression, code minification, lazy loading, CDN configuration and app bloat removal.
Before and after scores documented. We verify all Core Web Vitals pass Google thresholds and deliver a full written report.
Choose the package that fits your needs. No hidden fees. All prices ex. VAT.
Custom scope? Request a bespoke quote — we'll scope it exactly to your needs.
Tell us about your store. We reply within 24 hours with a tailored proposal.
Minification removes unnecessary characters from JS files — whitespace, comments, long variable names — without changing functionality. A 200KB JS file might become 70KB after minification, loading 3× faster.
Adding `defer` or `async` to script tags tells the browser not to block page rendering while the JS downloads. This significantly improves First Contentful Paint and Time to Interactive scores.
Done correctly, no. We test all functionality on a staging environment before deploying changes to your live store.
Most premium themes ship with minified JS, but app scripts often don't. Custom sections added by previous developers rarely are. We audit everything and minify what isn't.
Typically a reduction of 0.5–1.8 seconds in Time to Interactive, depending on your current JS payload size.