Global Performance
6/6 locations ✓High global latency — average 665ms across 6 locations, fastest from Amsterdam (163ms), slowest from Sao Paulo (1170ms). No CDN detected. Cache-Control disables caching (no-store). 4 locations above the 500ms target.
Audit overview
Compliance and Content need attention; the other categories are in good shape.
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
Your mail setup has problems.
koloseum.com.pl fails 1 mail check: DMARC policy is none — monitoring only. This is the kind of misconfiguration that sends your mail to spam.
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.
2 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.
No <main> landmark found
Without a <main> landmark, screen-reader users can't skip past the navigation to the page content — every page starts with re-reading the menu.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
PLN 1,038 investment → PLN 19,267/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
8 barrier(s) likely increasing bounce by ~28%.
- Page takes 12.3s to loadUsers abandon at ~3s — you're 9.8s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- 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
- Viewport disables user zoomVisitors with low vision can't read the page — and some jurisdictions treat this as a legal risk→ Remove user-scalable=no; drop maximum-scale if it's below 2
- 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 detectedRODO: EUR 10.000 – EUR 20.000.000
- Trackers detected but no cookie policy foundRODO: EUR 5.000 – EUR 10.000.000
- Trackers detected but no cookie policy foundRODO: EUR 10.000 – EUR 20.000.000
Bounce-Rate Cost
PLN 13 891 /mo
+27.8pp bounce · ~2,778 lost visitors/mo
CPC: PLN 5.00
Bandwidth Waste
PLN 1,95 /mo
6105.8 MB/mo × 0.320 PLN/GB
- Optimize transfer: save ~611 KB per page loadSaves PLN 1,95/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.
3.99 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.32 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
45 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.009
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.73 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.
12.34 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.59 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.88 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.
0.461
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.79 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.
1.88 s
Categories
8Performance
All checks pass
Security
Content-Security-Policy header is missing
Accessibility
2 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 Bootstrap sites score 85+ on Compliance; you're at 64 — closing this gap is the highest-leverage improvement.
Technology stack
Bootstrap 4.0.0, on LiteSpeed/PHP
Stack Architecture
Bootstrap 4.0.0
FancyBox 3.2.10
Font Awesome 
Google Font API 
Google Maps 
HTTP/3 Microsoft Microsoft 365 
OWL Carousel 
Tailwind CSS WOW 
jQuery 3.3.1
PHP 8.4.24
LiteSpeed All Detected Technologies (14)
LiteSpeed is a high-scalability web server.
PHP is a general-purpose scripting language used for web development.
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.
FancyBox is a tool for displaying images, html content and multi-media in a Mac-style 'lightbox' that floats overtop of web page.
Font Awesome is a font and icon toolkit based on CSS and Less.
Google Font API is a web service that supports open-source font files that can be used on your web designs.
Google Maps is a web mapping service. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, bicycle and air, or public transportation.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
OWL Carousel is an enabled jQuery plugin that lets you create responsive carousel sliders.
Reveal CSS animation as you scroll down a page.
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.
Observations (4)
Runtime exposed via X-Powered-By header
The X-Powered-By header reveals 'PHP 8.4.24'. Remove this header in production to reduce information leakage.
No build tool detected
A framework (Bootstrap) 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 4.0.0. 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/sites/koloseum.com.pl)<a href="https://beavercheck.com/sites/koloseum.com.pl"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fkoloseum.com.pl" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fkoloseum.com.plExport & share
Download the audit, share with your team, or grab a fix plan ready to copy into your tracker.
Copies markdown to clipboard
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 B (88)
Sprint 1: Quick Wins
+6Highest ROI — low effort, high impact
- · No <main> landmark found
- · HSTS header is missing
- · 2 button(s) with no accessible text
Sprint 2: Core Fixes
+2Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found