Scanned on October 8, 2026
Your site performs well overall, but security needs immediate attention. Enable HSTS (Strict-Transport-Security) to encrypt all connections. You're excelling in SEO and accessibility for all users.
The IČO in your site footer (47756497) differs from the IČO our autocomplete found for the domain (31615104). Often a copy-pasted template footer or a recent legal entity change — verify the IČO in your footer matches your actual operating entity. Informational only, doesn't affect score.
Every problem found, sorted by how much fixing it helps and how much work the fix takes. Start with the quick wins.
High impact, little work. Do these first.
High impact, but the fix needs planning.
+1 more
Lower impact, quick to do.
+15 more
Lower impact and more work. Plan them once the rest is done.
+36 more
Weight: 25% · 11 passed · 6 warnings · 1 failed · 2 SPA (verify manually)
Why it matters: Over 200 KB of unused code significantly slows parsing and execution. This is one of the easiest performance wins — removing dead code requires no trade-offs.
How to fix: You're loading 548 KB of code that isn't used on this page. 1) Audit plugins and remove unused ones, 2) Use code-splitting for page-specific JS, 3) Run PurgeCSS on your stylesheets.
Evidence: PSI-lab · Confidence: low
What we found: 548 KB wasted on unused code!
Why it matters: Over 200 KB of unused code significantly slows parsing and execution. This is one of the easiest performance wins — removing dead code requires no trade-offs.
Note: This check uses heuristic detection and may produce false positives. Manual verification recommended.
Why it matters: A 3 MB page takes 6+ seconds on 3G mobile. Most e-commerce traffic is mobile — heavy pages lose customers on poor connections.
How to fix: Reduce page weight: compress images to WebP (saves 30-50%), enable text compression (gzip/brotli), lazy load below-fold images, remove unused CSS/JS.
Evidence: PSI-lab · Confidence: high
What we found: 2.0 MB, 63 requests (optimal: <1.5 MB, <50 req)
Why it matters: A 3 MB page takes 6+ seconds on 3G mobile. Most e-commerce traffic is mobile — heavy pages lose customers on poor connections.
Why it matters: Measured on a first load with no interaction, so scripts gated behind cookie consent don't count against you here. The 600 KB bar is best practice, not the cohort average: the shops we benchmarked have a median of 1 270 KB, and the best of them (a category winner that won on mobile) ships 410 KB.
How to fix: Split the bundle so a product page doesn't load checkout and account code. Defer third-party scripts until interaction. Drop unused plugin bundles — on most shops these outweigh your own code.
Evidence: PSI-lab · 1004 KB JavaScript · Confidence: high
What we found: 1004 KB — over the 600 KB budget, but below the 1270 KB median of the award-winning shops we benchmarked
Why it matters: Measured on a first load with no interaction, so scripts gated behind cookie consent don't count against you here. The 600 KB bar is best practice, not the cohort average: the shops we benchmarked have a median of 1 270 KB, and the best of them (a category winner that won on mobile) ships 410 KB.
Why it matters: Without lazy loading, ALL images download on page load — even those never scrolled to. On a product page with 20 images, lazy loading can save most of the initial download.
How to fix: Add loading='lazy' to all images below the fold. Keep the hero/LCP image eager-loaded. Native lazy loading is supported by all modern browsers.
Evidence: HTML-heuristic · Confidence: high
What we found: 98 images without lazy loading
Why it matters: Without lazy loading, ALL images download on page load — even those never scrolled to. On a product page with 20 images, lazy loading can save most of the initial download.
Why it matters: no-cache/no-store forces browsers to re-download resources on every visit. Repeat visitors load your entire site from scratch every time.
How to fix: Set appropriate cache headers: static assets should have max-age=31536000 with versioned filenames. HTML pages can use max-age=0 with ETag for revalidation.
Evidence: HTTP-header · Confidence: high
What we found: no-store, no-cache, must-revalidate, no-cache, private
Why it matters: no-cache/no-store forces browsers to re-download resources on every visit. Repeat visitors load your entire site from scratch every time.
Why it matters: Synchronous scripts block HTML parsing — the browser stops rendering until each script downloads and executes. Async/defer allows parallel downloading without blocking.
How to fix: Add 'defer' to scripts that don't need to run immediately, 'async' for independent scripts. Use type='module' for modern ES modules. Only critical inline scripts should be synchronous.
Evidence: HTML-heuristic · Confidence: high
What we found: Only 60% of 10 scripts use async/defer
Why it matters: Synchronous scripts block HTML parsing — the browser stops rendering until each script downloads and executes. Async/defer allows parallel downloading without blocking.
Why it matters: Third-party connections require DNS lookup, TCP handshake, and TLS negotiation. Preconnect performs these in parallel with HTML parsing, saving 100-300ms per origin.
How to fix: Add <link rel='preconnect'> for key third-party domains: static.chatgo.cz, www.googletagmanager.com, connect.facebook.net. Preconnect saves 100-300ms per domain by starting DNS+TCP+TLS early.
Evidence: PSI-lab · Confidence: high
What we found: 5 external domains without preconnect
Why it matters: Third-party connections require DNS lookup, TCP handshake, and TLS negotiation. Preconnect performs these in parallel with HTML parsing, saving 100-300ms per origin.
Why it matters: We report this as unmeasured rather than as zero third parties, because those are very different findings.
How to fix: Re-run the scan, or check the third-party summary directly at PageSpeed Insights.
Evidence: PSI-lab · Confidence: high
How to fix: Re-run the scan, or test directly at PageSpeed Insights. This metric needs a successful Lighthouse lab run.
Evidence: PSI-lab · Confidence: high
Your store doesn't qualify for the Zulien Score Badge yet. Score 80+ to earn it!
| Category | Score | Weight | Failures | Warnings | OK |
|---|---|---|---|---|---|
| Performance | 89/100 | 25% | 1 | 6 | 11 |
| SEO | 92/100 | 20% | 0 | 4 | 20 |
| Security | 57/100 | 15% | 2 | 9 | 7 |
| Mobile | 64/100 | 10% | 1 | 10 | 7 |
| AI Readiness | 65/100 | 10% | 1 | 24 | 10 |
| Legal & Compliance | 80/100 | 10% | 1 | 4 | 10 |
| Vulnerability | 62/100 | 10% | 4 | 4 | 7 |
Every problem found, sorted by how much fixing it helps and how much work the fix takes. Start with the quick wins.
High impact, little work. Do these first.
| Finding | Category | Effort |
|---|---|---|
| Admin Panel at Default URL | Vulnerability | quick fix |
| HTTP → HTTPS Redirect | Security | quick fix |
| HSTS (Strict-Transport-Security) | Security | quick fix |
| Consumer Dispute Resolution Links | Legal & Compliance | quick fix |
High impact, but the fix needs planning.
| Finding | Category | Effort |
|---|---|---|
| Known Vulnerabilities (CVE) | Vulnerability | project |
| Content-Security-Policy (CSP) | Security | about a day |
| Link Text Quality (WCAG 2.4.4) | Mobile | about a day |
| jQuery Version | Vulnerability | about a day |
| Payment Page Security | Vulnerability | about a day |
| Unused Code (CSS + JS) | Performance | project |
Lower impact, quick to do.
| Finding | Category | Effort |
|---|---|---|
| Cache-Control Strategy | Performance | quick fix |
| Meta Description | SEO | quick fix |
| Twitter/X Cards | SEO | quick fix |
| Canonical URL Consistency | SEO | quick fix |
| DNSSEC | Security | quick fix |
| CAA DNS Record | Security | quick fix |
| Referrer-Policy | Security | quick fix |
| Permissions-Policy | Security | quick fix |
| Cookie Security Flags | Security | quick fix |
| Subresource Integrity (SRI) | Security | quick fix |
| Iframe Sandboxing | Security | quick fix |
| Theme Color | Mobile | quick fix |
+8 more
Lower impact and more work. Plan them once the rest is done.
| Finding | Category | Effort |
|---|---|---|
| Lazy Loading | Performance | about a day |
| Script Loading Strategy | Performance | about a day |
| Image Format Optimization | SEO | about a day |
| CDN / WAF Protection | Security | about a day |
| Touch Target Size | Mobile | about a day |
| Font Size Readability | Mobile | about a day |
| PWA Features | Mobile | about a day |
| Responsive Images (srcset) | Mobile | about a day |
| Mobile Sticky CTA | Mobile | about a day |
| Structured Data Foundation | AI Readiness | about a day |
| Organization Schema + Entity Linking | AI Readiness | about a day |
| FAQ Schema (Direct AI Answers) | AI Readiness | about a day |
+29 more
The full interactive version, with clickable links and the option to re-scan, is here:
https://score.zulien.sk/r/adet.sk