Global Performance
6/6 locations ✓Excellent global latency — average 23ms across 6 locations, fastest from Singapore (10ms), slowest from Amsterdam (43ms). Document on Fastly; assets also on Akamai, AWS CloudFront.
Audit overview
All categories sit comfortably above the 70 threshold; this is a clean audit.
Fix Priority Matrix
5 findingsQuick Wins
3High impact, low effort — start here.
Strategic
2High impact, requires investment.
Easy Improvements
0Small gains, minimal effort.
Nothing in this quadrant — good news.
Deprioritize
0Low impact, high effort — do last.
Nothing in this quadrant — good news.
Screenshots
Top Priorities (5)
Content-Security-Policy header is missing
Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.
1 button(s) with no accessible text
Buttons with no accessible text (icon-only, no aria-label) can't be activated by voice control or understood by screen readers.
67 image(s) missing alt attribute
Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.
67 image-in-link without alt text
Image-only links with no alt create empty links — screen-reader users hear 'link' with no destination context.
No H1 heading found
No H1 means screen-reader users can't identify the page's primary topic, and Google's content-extraction degrades.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
£425 investment → £3,254/month returns + GBP 17,550,000 risk avoided
Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.
Conversion barriers
5 barrier(s) likely increasing bounce by ~31%.
- Page takes 18.2s to loadUsers abandon at ~3s — you're 15.7s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- Page feels frozen for 4.0sClicks on the primary CTA are ignored while JavaScript runs→ Break up long tasks; defer non-critical JavaScript to post-hydration
- Severe layout shift during page loadUsers mis-click when content jumps — converting intent into frustration→ Reserve space for images, ads, and embeds with explicit width/height
- 4 broken link(s) on the pageClicks land on 404s — trust drops and the session often ends→ Fix or remove the broken destinations surfaced on the Content tab
- No Content-Security-Policy headerHigher XSS blast radius — one compromised script can exfiltrate the checkout form→ Ship a reporting-only CSP first, then enforce once violations are clean
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
Remediation cost
Start here for the best return on investment
Cost by category
Cost by effort level
Adjust assumptions
Team composition
Multiplier applied to dev hours to reflect QA, design, and PM overhead. Use Dev only for solo work; Full team for projects with formal review processes.
Rates reflect fully-loaded developer cost including overhead
Warning:Cost of inaction
Compliance Risk
£17,550,000
- 1 advertising/retargeting trackers detectedUK GDPR: GBP 10,000 – GBP 17,500,000
- 3 of 4 <nav> elements are unlabeledEquality Act 2010: GBP 500 – GBP 50,000
- No H1 heading foundEquality Act 2010: GBP 500 – GBP 50,000
Bounce-Rate Cost
£3,253 /mo
+31.0pp bounce · ~3,098 lost visitors/mo
CPC: GBP 1.05
Bandwidth Waste
£0.71 /mo
11350.1 MB/mo × 0.063 GBP/GB
- Optimize transfer: save ~1.1 MB per page loadSaves £0.71/mo
Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 5 critical issues to capture this value
How this is calculated
Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.
Your site's LCP: → estimated after fixes.
These are estimates based on industry research — actual results vary
Your data stays in your browser — nothing is sent to our servers
Lighthouse
Mobile
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.17 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
18.20 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
4.02 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.819
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.55 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
23.48 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.94 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.59 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
369 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.364
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.24 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
4.89 s
Categories
8Performance
All checks pass
Security
Content-Security-Policy header is missing
Accessibility
1 button(s) with no accessible text
SEO
All checks pass
Infrastructure
All checks pass
Compliance
All checks pass
Content
All checks pass
Sustainability
All checks pass
How you compare
Where this site stands against peers running the same stack.
Top 10% of Cart Functionality sites score 94+ on Content; you're at 86 — closing this gap is the highest-leverage improvement.
Technology stack
Apple, on Turbopack, hosted on Next.js, with Fastly CDN
Stack Architecture
Chartbeat 
Cxense 
Google Tag Manager 
Integral Ad Science 
Optimizely 
Cart Functionality 
Fourthwall web-3.25.0-1
Piano 
Bootstrap Google Search Console HSTS 
HTTP/3 
Open Graph 
React 
RequireJS 2.0.5
RxJS 
Varnish 
Webpack 
core-js 3.10.2
mParticle 
Turbopack 
styled-components 6.1.19
Fastly 
Next.js 16.2.6All Detected Technologies (25)
Next.js is a React framework for developing single page Javascript applications.
Turbopack is an incremental bundler for JavaScript and TypeScript, written in Rust and integrated into the Next.js framework for optimized build performance.
Styled components is a CSS-in-JS styling framework that uses tagged template literals in JavaScript.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Fourthwall helps to create and launch a branded website.
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Open Graph is a protocol that is used to integrate any web page into the social graph.
React is an open-source JavaScript library for building user interfaces or UI components.
RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming.
RxJS is a reactive library used to implement reactive programming to deal with async implementation, callbacks, and event-based programs.
Varnish is a reverse caching proxy.
Webpack is an open-source JavaScript module bundler.
core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.
mParticle is a mobile-focused event tracking and data ingestion tool.
Chartbeat is a web analytics service that provides real-time data and insights into website performance, audience engagement, and content effectiveness for publishers and media organizations.
Cxense was an AI-powered data management and intelligent personalisation platform.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Integral Ad Science is an American publicly owned technology company that analyses the value of digital advertising placements.
Optimizely is an experimentation platform that helps developers build and run A/B tests on websites.
Piano is a enterprise SaaS company which specialising in advanced media business processes and ecommerce optimisation.
Observations (2)
Runtime exposed via X-Powered-By header
The X-Powered-By header reveals 'styled-components 6.1.19'. Remove this header in production to reduce information leakage.
Complex technology stack detected
25 technologies identified. A complex stack increases maintenance burden and attack surface. Consider whether all components are actively needed.
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Fix Plan
Three-week roadmap to ship the audit's findings, with one-click copy targets for your tracker.
Three-week fix plan
2 sprints · 6h total → projected B (89)
Sprint 1: Quick Wins
+3Highest ROI — low effort, high impact
- · No H1 heading found
- · 1 button(s) with no accessible text
- · 67 image-in-link without alt text
Sprint 2: Core Fixes
+3Medium effort, high structural impact
- · 67 image(s) missing alt attribute
- · Content-Security-Policy header is missing