Audit overview
5 categories need attention: Performance, and 4 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.
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 5.7 MB (5.6 MB transferred)
Informational: total page weight (uncompressed) and bytes actually transferred over the wire.
84 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.
Cookie 'TS01c28963' has no SameSite attribute
Without SameSite, cookies ride along on cross-site requests — enabling CSRF attacks that SameSite=Lax blocks for free.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
€531 investment → €6,221/month returns + EUR 120,500,000 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
7 barrier(s) likely increasing bounce by ~28%.
- Page takes 34.1s to loadUsers abandon at ~3s — you're 31.6s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- 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
- 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
- No Open Graph tagsLinks shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop→ Add og:title, og:description, og:image, og:url to the page head
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
€120.500.000
- No privacy policy link detectedAVG: EUR 10.000 – EUR 20.000.000
- Trackers detected but no cookie policy foundAVG: EUR 5.000 – EUR 10.000.000
- Trackers detected but no cookie policy foundAVG: EUR 10.000 – EUR 20.000.000
Bounce-Rate Cost
€6.219 /mo
+28.3pp bounce · ~2,827 lost visitors/mo
CPC: EUR 2.20
Bandwidth Waste
€1,31 /mo
17748.4 MB/mo × 0.074 EUR/GB
- Optimize transfer: save ~1.8 MB per page loadSaves €1,31/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.
12.93 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
34.11 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
116 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.283
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
12.93 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.
34.18 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.45 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.02 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.051
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.27 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.
6.03 s
Categories
8Performance
Page weighs 5.7 MB (5.6 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.
Top 10% of Bootstrap sites score 95+ on Content; you're at 67 — closing this gap is the highest-leverage improvement.
Technology stack
Adobe Client Data Layer 2.0.2
Stack Architecture
All Detected Technologies (14)
Adobe Client Data Layer is a framework of JavaScript objects on your site that contains all variable values used in your implementation.
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.
Packery is a JavaScript library and jQuery plugin that makes gapless and draggable layouts.
Popper is a positioning engine, its purpose is to calculate the position of an element to make it possible to position it near a given reference element.
ReadSpeaker is an intuitive text-to-speech API that converts text into natural-sounding audio files for websites and applications.
ServiceNow is a cloud computing platform to help companies manage digital workflows for enterprise operations.
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.
jQuery UI is a collection of GUI widgets, animated visual effects, and themes implemented with jQuery, Cascading Style Sheets, and HTML.
AB Tasty is a customer experience optimisation company. AB Tasty offers AI-driven experimentation, personalisation, and product optimisation platforms for user testing.
Adobe Analytics is a web analytics, marketing and cross-channel analytics application.
Adobe Experience Cloud Launch is an extendable tag management solution for Adobe Experience Cloud, Adobe Experience Platform, and other applications.
Observations (3)
No build tool detected
A framework (Adobe Client Data Layer) 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.
Bootstrap version may be outdated
Detected Bootstrap 4.6.1. The current major version is 5. Consider updating for security patches and new features.
Complex technology stack detected
14 technologies identified. A complex stack increases maintenance burden and attack surface. Consider whether all components are actively needed.
Show your score
Drop this badge on your README, marketing site, or status page. It auto-updates every time the audit re-runs and links back to this report.
This badge auto-updates with your latest scan result.
[](https://beavercheck.com/results/d0705478-d662-4ae3-acf9-95d05e3adf4f)<a href="https://beavercheck.com/results/d0705478-d662-4ae3-acf9-95d05e3adf4f"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fbelastingdienst.nl" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fbelastingdienst.nlFix 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 (82)
Sprint 1: Quick Wins
+5Highest ROI — low effort, high impact
- · Page weighs 5.7 MB (5.6 MB transferred)
- · 84 third-party resources (100% of weight)
- · Cookie 'TS01c28963' has no SameSite attribute
Sprint 2: Core Fixes
+3Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found


