Audit Result
UUID: 019ea66f-fc5e-70b6-9ca7-dc7d3fa9b76b
https://protonvpn.com/
Scanned 2 months ago
Meta Information
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Title Tag Pass
Found 35 characters. Length is optimal.
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Meta Description Pass
Found 136 characters. Good snippet length.
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Canonical URL Pass
Canonical found: https://protonvpn.com
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Viewport Meta Pass
Viewport configured: width=device-width, initial-scale=1, shrink-to-fit=no
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HTML Lang Pass
Language declared as "en".
Content Structure
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H1 Tag Pass
Exactly one H1 found: "The best VPN to take control of your online world".
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Heading Hierarchy Pass
Valid heading flow across 27 headings.
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Image Alt Text Error
25 of 63 images are missing alt text.
Fix: Add meaningful alt attributes to all informative images for accessibility and image SEO.
Technical Optimization
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HTTPS Pass
Page is served over HTTPS.
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HSTS & HTTPS Redirect Warning
1 HTTPS hardening issues detected.
- • Could not probe the HTTP version of this page.
- • Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Fix: Set Strict-Transport-Security with a long max-age, add includeSubDomains, and redirect all HTTP requests to HTTPS.
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Security Headers Warning
Missing: content-security-policy.
Full HTTP headers (20)
- • accept-ranges: bytes
- • cache-control: no-store, no-cache, must-revalidate, proxy-revalidate
- • content-encoding: gzip
- • content-length: 46753
- • content-security-policy-report-only: default-src 'self'; media-src 'self'; connect-src 'self' https://vpncdn.protonweb.com https://account.proton.me https://account.protonvpn.com https://telemetry.protonvpn.com *.metrics.convertexperiments.com logs.convertexperiments.com *.convertexperiments.com; script-src 'self' blob: 'unsafe-eval' 'unsafe-inline' https://vpncdn.protonweb.com; style-src 'self' 'unsafe-inline' https://vpncdn.protonweb.com; font-src 'self' https://vpncdn.protonweb.com; img-src 'self' data: blob: https:; frame-src 'self' data: blob: https://www.youtube-nocookie.com https://www.openstreetmap.org; object-src 'self' data: blob:; child-src 'self' data: blob:; report-uri https://reports.proton.me/reports/csp; frame-ancestors 'self';
- • content-type: text/html; charset=utf-8
- • date: Mon, 08 Jun 2026 08:53:29 GMT
- • etag: "5052f-6536e7b92f340-gzip"
- • expires: 0
- • last-modified: Thu, 04 Jun 2026 14:37:25 GMT
- • pragma: no-cache
- • referrer-policy: strict-origin-when-cross-origin
- • strict-transport-security: max-age=31536000; includeSubDomains; preload
- • vary: Accept-Encoding
- • x-ab-variant: A
- • x-content-type-options: nosniff
- • x-frame-options: sameorigin
- • x-permitted-cross-domain-policies: none
- • x-ua-compatible: IE=Edge
- • x-xss-protection: 0
Fix: Add the missing security headers at your reverse proxy or application layer.
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CSP Quality Warning
Content-Security-Policy header is missing.
- • Missing Content-Security-Policy header.
Fix: Define a restrictive Content-Security-Policy and avoid unsafe directives such as unsafe-inline and unsafe-eval.
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Cookie Security Pass
No first-party cookies were set during the initial page load.
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Server response headers do not expose version tokens.
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Cloudflare Proxy Warning
Domain does not appear to be behind Cloudflare.
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Perceived Load Time Pass
Loaded in 0.74s (perceived).
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Render Blocking Resources Warning
0 scripts and 3 styles may block rendering.
- • style: https://protonvpn.com/_astro/ErrorPageContent.BugEGqF3.css
- • style: https://protonvpn.com/_astro/_..BktDSegz.css
- • style: https://protonvpn.com/_astro/PdfPreviewInner.B-PDs4zH.css
Fix: Defer non-critical scripts and inline critical CSS to improve first paint speed.
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Compression Warning
1 text resources look uncompressed.
- • https://telemetry.protonvpn.com/payload (application/json)
Fix: Enable Brotli or Gzip compression for HTML, CSS, JS, and JSON responses.
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Robots.txt Pass
Found robots.txt (200).
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Sitemap File Pass
Found sitemap (200) at https://protonvpn.com/sitemap.xml.
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Crawl Directives Pass
Robots meta found: index, follow
Accessibility Basics
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Form Labels Pass
All 2 controls are labeled.
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Landmarks Pass
Header, nav, main, and footer landmarks are present.
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Tap Target Size Warning
25 interactive elements appear smaller than 48px.
- • a.mb-1.flex ((function(link) { const handler = () => { try { window.localStorage.setItem('ref) - 139x28px
- • button#headlessui-popover-button-_r89R_6pb6c_.flex.items-center (Why Proton VPN) - 116x22px
- • button#headlessui-popover-button-_r89R_6rb6c_.flex.items-center (Download) - 71x22px
- • button#headlessui-popover-button-_r89R_6sb6c_.flex.items-center (Resources) - 76x22px
- • button#headlessui-popover-button-_r89R_3dd6c_.flex.items-center (Discover Proton) - 114x22px
- • a.inline-flex.shrink-0 (Get Proton VPN(function(link) { const handler = () => { try { window.localStorag) - 129x30px
- • a.inline-flex.shrink-0 (Sign in) - 70x30px
- • a.inline-flex.shrink-0 (Try now) - 79x30px
- • button.cursor-pointer.no-underline (More information) - 20x20px
- • button.cursor-pointer.no-underline (More information) - 20x20px
- • button.cursor-pointer.no-underline (More information) - 20x20px
- • button.cursor-pointer.no-underline (More information) - 20x20px
- • button.cursor-pointer.no-underline (More information) - 20x20px
- • a.inline-flex.shrink-0 (View plans) - 124x38px
- • a.inline.font-semibold (Read article) - 104x31px
- • a.inline.font-semibold (Read article) - 104x31px
- • a.inline.font-semibold (Read article) - 104x31px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
- • a.block ((new window)) - 24x24px
Fix: Increase target size to at least 48x48 CSS pixels for touch interactions.
Social & Rich Results
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Open Graph Basics Pass
Core Open Graph tags are present.
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Twitter Card Pass
twitter:card set to summary_large_image.
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Structured Data Pass
JSON-LD schema detected.
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PWA Metadata Pass
Manifest and Apple touch icon are configured.
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Social preview metadata and image quality look good for Open Graph/Twitter.
- • GUIDELINE: Optimal og:title length: 40-60 characters (acceptable: 10-70).
- • GUIDELINE: Optimal og:description length: 110-160 characters (acceptable: 50-200).
- • GUIDELINE: Optimal preview image size: 1200x630 pixels.
- • GUIDELINE: Optimal preview image aspect ratio: 1.91:1.
- • GUIDELINE: Optimal preview image file size: under 5 MB.
- • GUIDELINE: Recommended twitter:card: summary_large_image.
- • MEASURED: Image size: 0.48 MB
- • MEASURED: Image dimensions: 1200x630
Links Analysis
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Internal Links Pass
Checked 80 links. No broken internal links found.
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External Links Warning
2 external links returned errors or timed out.
- • https://nordvpn.com/pricing/ (HTTP 403)
- • https://www.reddit.com/r/ProtonVPN/ (HTTP 403)
Fix: Replace dead external URLs or point to working alternatives.
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Link Format Pass
All 186 links use non-empty href values.
Performance & Runtime
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Core Web Vitals: LCP Pass
Largest Contentful Paint: 0.78s.
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Core Web Vitals: CLS Pass
Cumulative Layout Shift: 0.004.
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Total Blocking Time estimate: 35ms.
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Broken Assets Pass
No failed CSS/JS/image/font/media requests detected.
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JavaScript Runtime Errors Warning
2 JavaScript runtime issues detected.
- • Request failed: https://protonvpn.com/?load=ajax&lang=en (net::ERR_ABORTED, type: fetch)
- • Minified React error #418; visit https://react.dev/errors/418?args[]=HTML&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
Fix: Fix JS files returning 404/failed requests and resolve the listed runtime exceptions.