Free Tool
Shopify Speed Test
Mobile-first performance scorecard plus the Top 3 Shopify-specific fixes - each pointed at the exact Shopify Admin page where you'd apply it. Public storefront only, no auth required.
What this tool does
Mobile-first performance scorecard with Shopify-specific fixes
This tool runs a full Lighthouse-grade audit against any Shopify storefront and returns the 4 category scores (Performance, Accessibility, Best Practices, SEO), Core Web Vitals (LCP, CLS, INP, TBT, FCP, Speed Index), and the Top 3 highest-impact fixes - each translated from engineering jargon into Shopify-merchant language and pointed at the exact Shopify Admin page where you'd apply it. Default test environment is mobile, because that's how most shoppers experience your store and how Google ranks you.
How to use it
From URL to scorecard in 30-60 seconds
- 1
Paste the storefront URL (yours or a competitor's). Custom domain or .myshopify.com both work.
- 2
Pick mobile (default) or desktop test environment. Mobile is usually what matters - 70-80% of Shopify traffic is mobile.
- 3
Click Run speed test. The tool fetches the URL, runs a full Lighthouse audit (30-60 seconds), and returns scored results.
- 4
Read the 4 category scores. Performance is the one that matters most for revenue - every 100ms slower mobile = ~7% drop in conversion.
- 5
Work through the Top 3 fixes top-down. Each fix has a 'Open in Shopify Admin' link that takes you to the exact page where the change happens.
Merchant tips
Reading the result honestly
A perfect 100 isn't realistic for any e-commerce store - product images, third-party apps, and tracking pixels all cost speed. Aim for 70+ on mobile, 90+ on desktop. Anything below 50 is in 'major conversion impact' territory.
Core Web Vitals matter more than the topline Performance score for SEO. Google uses LCP, INP, and CLS directly as ranking signals. If your Performance score is mediocre but your CWV pass, your ranking is fine.
The biggest single fix on most Shopify stores is 'too many apps loading on every page'. Audit your installed apps quarterly - removing unused apps typically shaves 500-1500ms off mobile load time.
Image optimization is the second biggest win. Re-export hero and product images at 1500-2000px wide BEFORE uploading - Shopify can't unscramble a 4000px source.
Run the test on a product page, not just the home page. Product pages typically have 30-50% more weight than the home page (product images, review widgets, recommendation carousels).
When to use this
When to reach for this
Quarterly site-health check
Run on your home + top product page. Catch theme bloat or app accumulation before it tanks conversion.
After installing a new app
Run before + after to measure the actual cost. If a new app shaves 500ms off your LCP, decide whether the feature justifies it.
Before a big seasonal push
Black Friday traffic surges expose every performance weakness. Audit and fix in October, not November.
What you get out
4-score scorecard + Core Web Vitals + Top 3 fixes with admin links
Performance / Accessibility / Best Practices / SEO scores (0-100), a 6-metric Core Web Vitals panel (LCP, CLS, INP, TBT, FCP, Speed Index), and the Top 3 highest-impact fixes, each with severity badge, estimated savings, plain-English merchant copy, and a direct link to the Shopify Admin page where you'd apply it. 5 tests per IP per day on the free tier.
Want the full picture?
Tacey runs this on every order, automatically.
This tool gives you a one-off snapshot. Tacey watches every order the moment it's placed, catches problems before they ship, and recovers customers without you lifting a finger.
Install Free on ShopifyContinuous
Every order checked the moment it's placed - not just when you remember to run the calculator.
Automatic
Bad addresses fixed before they ship. Customers contacted without you lifting a finger.
Compounding
Trusted addresses learned over time. Repeat customers skip checks. Faster fulfillment, fewer reships.
Other free tools
Run the rest of the math
Profit Margin
Margin, markup, and gross profit - the three numbers every operator should know cold.
Conversion Rate
Conversion rate + revenue per visitor + monthly revenue from your traffic and order data.
Cart Abandonment
How much revenue you're leaving on the table - and what 10–20% rescue rates would recover.
CAC / LTV
Acquisition cost vs lifetime value. Healthy ratios, payback period, and what your ad math actually says.
Address Validator
Paste a shipping address, get instant deliverability + suggested fix. The tool we built for ourselves.
Bad-Address ROI
Plug in your monthly orders and undeliverable rate. See exactly what bad addresses cost you.
Email Preview
Side-by-side: vanilla Shopify confirmation vs the Tacey-style fix-page email.
Free Shipping Threshold
Recommended threshold + projected lift in average order value, from your AOV distribution.
Agentic Readiness
Score your Shopify store 0-100 across the 11 fields AI shopping agents check before recommending products in chat.
App Stack Detector
Paste any Shopify URL, see which apps it has installed across reviews, email, loyalty, subscriptions, and 14 more categories.
Carrier Fee Estimator
How much you're losing every month to FedEx + UPS address-correction fees. The four-figure leak buried in your carrier invoices.
Address Type Detector
PO Box, freight forwarder, commercial, or residential? Get the type, the fraud signal, and which carriers actually serve it.
Theme Detector
Paste any storefront URL, find out which Shopify theme it uses (and which version).
Sales Estimator
Directional estimate of how active a Shopify store is, based on public catalog data.
Search Quality Tester
Paste your store URL + a customer query. AI judges each search result for relevance and flags missing keywords + ranking issues.
Product Lookup
Cross-merchant pricing comparison. Paste a product name or URL, see who else sells it across Shopify and their prices.
Tool slug: shopify-speed-test