Audit overview
4 categories need attention: Performance, and 3 others.
Fix Priority Matrix
5 findingsQuick Wins
2High impact, low effort — start here.
Strategic
3High 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.
No Content-Security-Policy header found
Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.
Page weighs 14.2 MB (4.1 MB transferred)
Informational: total page weight (uncompressed) and bytes actually transferred over the wire.
is missing width/height — may cause layout shift
Performance issues directly impact user engagement and conversion rates.
81 third-party resources (100% of weight)
Informational: third-party resource count and their share of page weight. High share caps perf gains from frontend optimization.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
£600 investment → £12,503/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
7 barrier(s) likely increasing bounce by ~33%.
- Page takes 11.5s to loadUsers abandon at ~3s — you're 9.0s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- Page feels frozen for 1.9sClicks 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
- 3 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
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
- 2 advertising/retargeting trackers detectedUK GDPR: GBP 10,000 – GBP 17,500,000
- Skip navigation link is missing (WCAG 2.4.1)Equality Act 2010: GBP 500 – GBP 50,000
- Heading level skipped: H3 → H6 (missing H4)Equality Act 2010: GBP 500 – GBP 50,000
Bounce-Rate Cost
£9,838 /mo
+32.8pp bounce · ~3,279 lost visitors/mo
CPC: GBP 3.00
Bandwidth Waste
£0.81 /mo
12827.4 MB/mo × 0.063 GBP/GB
- Optimize transfer: save ~1.3 MB per page loadSaves £0.81/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 3 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.
2.08 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.48 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.89 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.539
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
9.32 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.
25.92 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
608 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.88 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
233 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.423
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.28 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.
6.31 s
Categories
8Performance
Page weighs 14.2 MB (4.1 MB transferred)
Security
Content-Security-Policy header is missing
Accessibility
All checks pass
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.
Technology stack
Sanity, on styled-components, hosted on Snowplow Analytics, with Nginx CDN
Stack Architecture
DoubleClick Floodlight 
Gladly 
Google Publisher Tag 
Google Tag Manager 
Sanity Sanity.io 
Boomerang Facebook Google Search Console Google Workspace HSTS 
Open Graph 
RSS 
React 
SWC 
core-js 3.35.1
parcel 
styled-components 6.3.8
Nginx cdnjs 
Snowplow Analytics All Detected Technologies (22)
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Snowplow is an open-source behavioral data management platform for businesses.
Styled components is a CSS-in-JS styling framework that uses tagged template literals in JavaScript.
Sanity is a platform for structured content. It comes with an open-source, headless CMS that can be customized with Javascript, a real-time hosted data store and an asset delivery pipeline.
Sanity is a platform for structured content. It comes with an open-source, headless CMS that can be customized with Javascript, a real-time hosted data store and an asset delivery pipeline.
boomerang is a JavaScript library that measures the page load time experienced by real users, commonly called RUM (Real User Measurement).
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format.
React is an open-source JavaScript library for building user interfaces or UI components.
SWC is an extensible Rust-based platform for the next generation of fast developer tools.
core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.
Parcel is an open-source web application bundler known for its zero-config approach, simplifying the process of building and bundling web projects.
Gladly is a customer service platform.
Google Publisher Tag (GPT) is an ad tagging library for Google Ad Manager which is used to dynamically build ad requests.
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.
Observations (3)
Runtime exposed via X-Powered-By header
The X-Powered-By header reveals 'styled-components 6.3.8'. Remove this header in production to reduce information leakage.
No build tool detected
A framework (Amazon Route 53) was detected but no bundler was identified. The build tool may not be detectable from output patterns, or the site may use the framework's built-in bundler.
Complex technology stack detected
22 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 · 8h total → projected B (82)
Sprint 1: Quick Wins
+3Highest ROI — low effort, high impact
- · Page weighs 14.2 MB (4.1 MB transferred)
- · 81 third-party resources (100% of weight)
Sprint 2: Core Fixes
+5Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found
- · is missing width/height — may cause layout shift