Audit Result

UUID: 019eaa9a-fffe-727c-8f91-d140043ff7a7

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protonvpn.com

https://protonvpn.com/

Scanned 2 months ago

85
Excellent Score
39 total checks
Passed
28
Warnings
10
Errors
1

Meta Information

  • Title Tag Pass

    Found 48 characters. Length is optimal.

  • Meta Description Pass

    Found 136 characters. Good snippet length.

  • Canonical URL Warning

    Canonical link not found.

    Fix: Add <link rel="canonical" href="https://example.com/page"> to avoid duplicate URL ambiguity.

  • Favicon Pass

    Favicon found and reachable: /favicons/favicon-32x32.png (HTTP 200).

    Favicon
  • Viewport Meta Pass

    Viewport configured: width=device-width, initial-scale=1, shrink-to-fit=no

  • HTML Lang Pass

    Language declared as "en".

Content Structure

  • H1 Tag Pass

    Exactly one H1 found: "The best VPN to take control of your online world".

  • Heading Hierarchy Pass

    Valid heading flow across 28 headings.

  • Image Alt Text Error

    26 of 64 images are missing alt text.

    Fix: Add meaningful alt attributes to all informative images for accessibility and image SEO.

Technical Optimization

  • HTTPS Pass

    Page is served over HTTPS.

  • 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.

  • 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: 46483
    • • 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: Tue, 09 Jun 2026 04:18:56 GMT
    • • etag: "50a27-653bf59570cc0-gzip"
    • • expires: 0
    • • last-modified: Mon, 08 Jun 2026 15:06:03 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: B
    • • 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.

  • 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.

  • Cookie Security Pass

    No first-party cookies were set during the initial page load.

  • Server Version Disclosure Pass

    Server response headers do not expose version tokens.

  • Cloudflare Proxy Warning

    Domain does not appear to be behind Cloudflare.

  • Perceived Load Time Pass

    Loaded in 0.64s (perceived).

  • 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.

  • 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.

  • Robots.txt Pass

    Found robots.txt (200).

  • Sitemap File Pass

    Found sitemap (200) at https://protonvpn.com/sitemap.xml.

  • Crawl Directives Pass

    Robots meta found: noindex, nofollow

Accessibility Basics

  • Form Labels Pass

    All 2 controls are labeled.

  • Landmarks Pass

    Header, nav, main, and footer landmarks are present.

  • 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-_r90R_6pb6c_.flex.items-center (Why Proton VPN) - 116x22px
    • • button#headlessui-popover-button-_r90R_6rb6c_.flex.items-center (Download) - 71x22px
    • • button#headlessui-popover-button-_r90R_6sb6c_.flex.items-center (Resources) - 76x22px
    • • button#headlessui-popover-button-_r90R_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

  • Open Graph Basics Pass

    Core Open Graph tags are present.

  • Open Graph Image Pass

    og:image is present and absolute.

    Open Graph Image
  • Twitter Card Pass

    twitter:card set to summary_large_image.

  • Structured Data Pass

    JSON-LD schema detected.

  • PWA Metadata Pass

    Manifest and Apple touch icon are configured.

  • Open Graph/Twitter Quality Pass

    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

  • Internal Links Pass

    Checked 80 links. No broken internal links found.

  • 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.

  • Link Format Pass

    All 187 links use non-empty href values.

Performance & Runtime

  • Core Web Vitals: LCP Pass

    Largest Contentful Paint: 0.72s.

  • Core Web Vitals: CLS Pass

    Cumulative Layout Shift: 0.004.

  • Main Thread Blocking (TBT) Pass

    Total Blocking Time estimate: 14ms.

  • Broken Assets Pass

    No failed CSS/JS/image/font/media requests detected.

  • 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.