Shopify Speed Optimization Service — From 35 to 90+ PageSpeed

MILEDEVS takes Shopify stores from PageSpeed 35 to 90+ by removing app script bloat, optimizing images and refactoring render-blocking theme code. If your store loads in over 3 seconds you're losing roughly 40% of mobile visitors — a speed fix typically lifts conversion 15–25% and pays for itself within weeks.

Slow Shopify stores are rarely slow because of Shopify. They're slow because of what's been added on top: 20+ apps each injecting scripts, oversized hero images, fonts loaded from three different CDNs, and theme sections that block rendering. We find what's actually slowing your store and fix it — without breaking features you rely on.

Check where you stand first: run your store through our free website speed checker — it pulls your real Core Web Vitals in 30 seconds.

What's usually killing Shopify speed

Cause	Typical impact	The fix
App script bloat (15–30 apps)	1–3s of main-thread blocking	Remove dead apps, lazy-load the rest, replace 2–3 with native code
Unoptimized images	2–5s LCP on mobile	Responsive srcset, WebP/AVIF, correct sizing, preload LCP image
Render-blocking theme code	0.5–2s first paint delay	Defer non-critical JS/CSS, inline critical CSS, clean Liquid loops
Third-party pixels & trackers	0.5–1.5s	Consolidate via one tag strategy, load after interaction
Heavy fonts & icon libraries	0.3–1s + layout shift	Subset fonts, font-display: swap, drop unused weights

What you get

Speed audit (48 hours). Lab + field data for your key templates (home, collection, product, cart). Every issue ranked by conversion impact vs effort — you see exactly what's worth fixing and what isn't.
The fix sprint (1–2 weeks). We implement on a development copy of your theme — you approve the preview before anything touches your live store.
Before/after proof. PageSpeed, Core Web Vitals (LCP, INP, CLS) and real-device tests, documented per template.
A no-regression checklist so future app installs don't quietly undo the work.

Real result: our typical optimization takes a store from PageSpeed ~35 to 90+ on mobile. Google's research puts every second of load-time improvement at roughly a 17% bounce-rate reduction on mobile commerce.

Why speed = revenue

Speed isn't a vanity metric. It compounds across the funnel: faster LCP → lower bounce → more product views → higher add-to-cart → better Google rankings (Core Web Vitals are a ranking factor) → cheaper paid traffic (better landing page experience scores). On a store doing $50k/month, a 15% conversion lift from speed work is worth $90k+ a year.

We've done this for stores like LUNESI, CARBON and HEADPHONE ZONE — see the full portfolio.

Pricing

Transparent hourly pricing from $30/hr. A full speed optimization typically lands between $900 and $2,500 depending on theme complexity and app count — fixed estimate after the free audit, before any work starts.

Losing sales to a slow store?

Send us your store — we'll review speed, UX and your conversion funnel and reply with a prioritized fix list within 48 hours. Free, no commitment.

Get a free audit

Speed optimization FAQ

How fast should a Shopify store load?

Aim for LCP under 2.5 seconds on mobile (Google's "good" threshold). Most unoptimized Shopify stores we audit sit at 4–7 seconds. Every second above 3s costs measurable conversion.

Will removing apps break my store?

No — we audit what each app actually does first. Dead apps (installed, unused, still loading scripts) get removed; needed functionality is kept or rebuilt natively in the theme, which is faster and saves monthly app fees.

Do you work on the live theme?

Never. All work happens on a development copy. You review a preview link, we A/B-check against the current version, and only then publish.

How long do results last?

The fixes are permanent, but new apps can add new bloat. We leave you a no-regression checklist, and offer a quarterly check-up if you want ongoing monitoring.

Can you guarantee a 90+ PageSpeed score?

We guarantee the issues in the audit get fixed and verified with before/after metrics. Most stores reach 85–95+ on mobile; stores with heavy required third-party scripts (subscriptions, bundles) may cap slightly lower — we'll tell you upfront in the audit.

Is PageSpeed score or Core Web Vitals more important?

Core Web Vitals (LCP, INP, CLS) — that's what Google ranks on and what users feel. The PageSpeed score is a useful summary, but we optimize for the field data your real visitors generate.