Elara — AI Shopping Assistant for Shopify Fashion Brands

TECHNICAL

Shopify Speed Audit Checklist for Fashion Stores

Fashion stores are harder to make fast than almost any other ecommerce category — every product page carries 6-12 images and every collection page loads dozens of thumbnails simultaneously. This checklist covers the fixes in priority order. Most of them require no developer.

29 items · Free to use · Updated September 2026

0 of 29 complete

Diagnose First

Run homepage through Google PageSpeed Insights (pagespeed.web.dev)

Run best-selling collection page through PageSpeed Insights

Run best-selling PDP through PageSpeed Insights

Note the failing metric for each: LCP, INP, or CLS

Check Shopify Admin → Online Store → Themes → View Report

Check Google Search Console → Core Web Vitals report

↳Pages marked "Poor" are being suppressed in Google rankings

Image Optimization (Biggest impact)

All product images uploaded in WebP format (Shopify converts automatically)

All product images resized to maximum display size before upload

↳2048px max for PDPs, 800px for collection thumbnails

All images under 500KB after compression (use Squoosh.app before uploading)

All <img> tags have explicit width and height attributes set

↳prevents layout shift (CLS) as images load

Hero image (LCP element) has fetchpriority="high" attribute

Below-fold images have loading="lazy" attribute

App Audit (Second biggest impact, often fastest fix)

List all installed Shopify apps in Admin → Apps

For each app: is it actively generating revenue or serving a customer need?

Uninstall any app that cannot answer "yes" to the above

↳each installed app adds approximately 150-300ms to LCP

For apps kept: check whether scripts can be scoped to specific pages only

Review any scripts manually added to theme files — are they deferred?

Theme Audit

Current theme is on the latest version (check for theme updates)

Unused sections in the theme editor are disabled or removed

Animation systems, parallax effects, or video backgrounds that are not used on most pages are disabled

Third-party scripts in <head> use defer or async attributes

Checkout Speed

Checkout page URL run through PageSpeed Insights

Apple Pay and Google Pay enabled (reduces checkout friction equivalent to a speed improvement)

Guest checkout enabled and prominently available

Validate

Re-run PageSpeed Insights after each major change

Target: LCP under 2.5 seconds on mobile

Target: CLS below 0.1

Target: INP below 200ms

Submit URLs to Google Search Console for re-indexing after improvements

Want Elara handling this for you, automatically?

AI styling, virtual try-on, and proactive engagement for Shopify fashion brands. 30-day free trial, no developer required.

Book a demo

Start free trial