Audit overview
6 categories need attention: Performance, and 5 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 40.8 MB (24.6 MB transferred)
Informational: total page weight (uncompressed) and bytes actually transferred over the wire.
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
¥2,246 investment → ¥39,491/month returns + CNY 50,000,000 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
11 barrier(s) likely increasing bounce by ~39%.
- Page takes 49.0s to loadUsers abandon at ~3s — you're 46.5s 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
- No viewport meta tagMobile browsers render at desktop width and shrink — text unreadable, tap targets miniature→ Add <meta name="viewport" content="width=device-width, initial-scale=1">
- 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
¥50,000,000
- No privacy policy link detectedPIPL: CNY 100,000 – CNY 50,000,000
- Privacy Policy not detectedPIPL: CNY 100,000 – CNY 50,000,000
Bounce-Rate Cost
¥39,446 /mo
+39.4pp bounce · ~3,945 lost visitors/mo
CPC: CNY 10.00
Bandwidth Waste
¥44 /mo
77509.6 MB/mo × 0.571 CNY/GB
- Optimize transfer: save ~7.8 MB per page loadSaves ¥44/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.
5.02 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
49.01 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.98 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.133
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
36.83 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.
102.09 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.50 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.56 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
562 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.159
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.87 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.
14.16 s
Categories
8Performance
Page weighs 40.8 MB (24.6 MB transferred)
Security
Content-Security-Policy header is missing
Accessibility
No <main> landmark found
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 95+ on SEO; you're at 74 — closing this gap is the highest-leverage improvement.
Technology stack
Babel, hosted on Tengine
Stack Architecture
Babel 
Webpack 
core-js 2.6.11
Tengine All Detected Technologies (4)
Tengine is a web server which is based on the Nginx HTTP server.
Babel is a free and open-source transcompiler for writing next generation JavaScript.
Webpack is an open-source JavaScript module bundler.
core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.
Observations (1)
No build tool detected
A framework (Babel) 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.
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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 C (74)
Sprint 1: Quick Wins
+6Highest ROI — low effort, high impact
- · Page weighs 40.8 MB (24.6 MB transferred)
- · No <main> landmark found
- · HSTS header is missing
Sprint 2: Core Fixes
+4Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found