Global Performance
6/6 locations ✓High global latency — average 647ms across 6 locations, fastest from Singapore (278ms), slowest from Santa Clara (1054ms). Cloudflare edge cache (DYNAMIC). Cache-Control disables caching (no-store). 3 locations above the 500ms target.
Audit overview
Compliance needs attention; the rest of the categories are in good shape.
Fix Priority Matrix
5 findingsQuick Wins
1High impact, low effort — start here.
Strategic
4High 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.
costdown.org fails 2 mail checks: No DMARC record found, No SPF record found. This is the kind of misconfiguration that sends your mail to spam.
Top Priorities (5)
'unsafe-inline' found in script source
Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.
1 render-blocking <script src> tag(s) without async/defer
Performance issues directly impact user engagement and conversion rates.
Cross-Origin-Embedder-Policy header is missing
COEP enforces that all embedded resources opt-in to cross-origin embedding — required for cross-origin isolation features.
Cross-Origin-Opener-Policy header is missing
COOP isolates your top-level browsing context from cross-origin windows — without it, popup-based side-channel attacks remain possible.
No DMARC record found
Without DMARC, anyone can send phishing emails using your domain name.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
₫6,150,000 investment → ₫40,517,757/month returns + VND 100,000,000 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
6 barrier(s) likely increasing bounce by ~24%.
- Page takes 5.2s to loadUsers abandon at ~3s — you're 2.7s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- High main-thread blocking timePage is non-interactive for 360ms after first paint→ Defer third-party scripts and split large bundles
- 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
- No structured dataNo rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices→ Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)
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
VND 100,000,000
- No privacy policy link detectedPDPD: VND 10,000,000 – VND 100,000,000
- Privacy Policy not detectedPDPD: VND 10,000,000 – VND 100,000,000
Bounce-Rate Cost
₫29,194,973 /mo
+24.3pp bounce · ~2,433 lost visitors/mo
CPC: VND 12000.00
Bandwidth Waste
₫3,437 /mo
1718.6 MB/mo × 2000.000 VND/GB
- Optimize transfer: save ~172 KB per page loadSaves ₫3,437/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 1 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.
2.65 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.18 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
360 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.94 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.
5.28 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
591 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.09 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
648 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.09 s
Categories
8Performance
1 render-blocking <script src> tag(s) without async/defer
Security
'unsafe-inline' found in script source
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 HSTS sites score 86+ on Compliance; you're at 63 — closing this gap is the highest-leverage improvement.
Top 10% of HTTP/3 sites score 87+ on Compliance; you're at 63 — closing this gap is the highest-leverage improvement.
Technology stack
HSTS, hosted on Next.js, with Cloudflare CDN
Stack Architecture
HTTP/3 
Lucide 
Priority Hints 
React 
Tailwind CSS 
Webpack 
Cloudflare 
Next.js 15.5.24 Next.js App Router All Detected Technologies (10)
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Next.js is a React framework for developing single page Javascript applications.
The Next.js App Router is a new paradigm for building applications using React's latest features.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Lucide is an open-source icon library that provides 1000+ vector (svg) files for displaying icons and symbols in digital and non-digital projects.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
React is an open-source JavaScript library for building user interfaces or UI components.
Webpack is an open-source JavaScript module bundler.
Observations (2)
No build tool detected
A framework (HSTS) 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
10 technologies identified. A complex stack increases maintenance burden and attack surface. Consider whether all components are actively needed.
Show your score
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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
3 sprints · 10h total → projected A (92)
Sprint 1: Quick Wins
+1Highest ROI — low effort, high impact
- · Cross-Origin-Opener-Policy header is missing
Sprint 2: Core Fixes
+2Medium effort, high structural impact
- · Cross-Origin-Embedder-Policy header is missing
- · No DMARC record found
- · 1 render-blocking <script src> tag(s) without async/defer
Sprint 3: Strategic Improvements
Higher effort, long-term payoff
- · 'unsafe-inline' found in script source