Audit overview
4 categories need attention: Performance, and 3 others.
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.
HSTS header is missing
Without HSTS, a network attacker can downgrade the very first connection to HTTP and steal the user's session.
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 20.2 MB (11.8 MB transferred)
Informational: total page weight (uncompressed) and bytes actually transferred over the wire.
17 link(s) with no accessible text
Links with no accessible text (empty <a></a>, image-only no alt, icon-only no aria-label) are unidentifiable to screen readers.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
€574 investment → €14,885/month returns + EUR 20,500,000 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
9 barrier(s) likely increasing bounce by ~32%.
- Page takes 10.0s to loadUsers abandon at ~3s — you're 7.5s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- Page feels frozen for 4.6sClicks on the primary CTA are ignored while JavaScript runs→ Break up long tasks; defer non-critical JavaScript to post-hydration
- 4 form field(s) without a labelScreen readers skip unlabeled fields; autofill can't identify them; checkout abandonment spikes→ Associate every input with a visible <label for="…">; add autocomplete attributes
- No HSTS headerReturning visitors are briefly exposed to downgrade attacks on first request→ Set Strict-Transport-Security: max-age=31536000; includeSubDomains
- 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
€20.500.000
- 4 advertising/retargeting trackers detectedGDPR: EUR 10.000 – EUR 20.000.000
- 3 of 3 <nav> elements are unlabeledEAA: EUR 1.000 – EUR 500.000
- Skip navigation link is missing (WCAG 2.4.1)EAA: EUR 1.000 – EUR 500.000
Bounce-Rate Cost
€10.374 /mo
+32.0pp bounce · ~3,201 lost visitors/mo
CPC: EUR 3.24
Bandwidth Waste
€2,76 /mo
37226.6 MB/mo × 0.074 EUR/GB
- Optimize transfer: save ~3.7 MB per page loadSaves €2,76/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.
3.47 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
4.59 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.099
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.68 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.
34.11 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.25 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.84 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
380 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.035
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.76 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.
6.36 s
Categories
8Performance
Page weighs 20.2 MB (11.8 MB transferred)
Security
Content-Security-Policy header is missing
Accessibility
17 link(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 core-js sites score 81+ on Performance; you're at 66 — closing this gap is the highest-leverage improvement.
Technology stack
Boomerang, on IIS/ASP.NET, hosted on Amazon Web Services, with Amazon S3 CDN
Stack Architecture
Ahrefs 
Akamai mPulse 
Chartbeat 
Collective Audience 
Crazy Egg 
DoubleClick Floodlight 
Facebook Pixel 2.9.303
Google Analytics 
Google Publisher Tag 
Google Tag Manager 
Pinterest Conversion Tag 
Quantcast Measure 
Teads 
TikTok Pixel 
Webpack 
Boomerang Facebook Facebook SDK Google Search Console Google Workspace Hotjar 
Lodash 1.8.3
Microsoft ASP.NET 
Open Graph 
RSS 
Swiper 
Windows Server 
YouTube 
core-js 3.32.2
jQuery 3.7.1 ASP.NET 
IIS 10.0
Amazon S3 
jsDelivr 
Amazon Web Services Microsoft IIS 10.0All Detected Technologies (36)
Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services (AWS) that provides object storage through a web service interface.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Amazon Web Services (AWS) is a comprehensive cloud services platform offering compute power, database storage, content delivery and other functionality.
Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
boomerang is a JavaScript library that measures the page load time experienced by real users, commonly called RUM (Real User Measurement).
Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
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.
Swiper is a JavaScript library that creates modern touch sliders with hardware-accelerated transitions.
Windows Server is a brand name for a group of server operating systems.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.
core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Ahrefs is an online toolset utilised for search engine optimisation (SEO) and competitor analysis, which permits users to analyse their website's performance, track keyword rankings, identify backlink opportunities, and research competitors' websites, among other features.
Akamai mPulse is a real user monitoring (RUM) solution that enables companies to monitor, find, and fix website and application performance issues.
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.
Collective Audience is a cloud ecosystem for media and brands on the open web, formerly known as BeOp.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Analytics is a free web analytics service that tracks and reports website traffic.
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.
Pinterest Conversion Tag allows you to track actions people take on your website after viewing your Promoted Pin.
Quantcast Measure is an audience insights and analytics tool.
Teads is a technology provider that sells ads on publisher websites.
Observations (2)
Server version exposed in headers
The Server header reveals 'IIS 10.0'. Exposing exact server versions helps attackers target known vulnerabilities. Consider configuring your server to hide version information.
Complex technology stack detected
36 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 · 7h total → projected C (78)
Sprint 1: Quick Wins
+7Highest ROI — low effort, high impact
- · Page weighs 20.2 MB (11.8 MB transferred)
- · HSTS header is missing
- · 17 link(s) with no accessible text
Sprint 2: Core Fixes
+3Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found