Audit Result

UUID: 019dd364-f909-7335-b633-d696031ea25a

Share on X Recheck Back to history
eli5.cc

https://eli5.cc/

Scanned 4 months ago

86
Excellent Score
39 total checks
Passed
29
Warnings
9
Errors
1

Meta Information

  • Title Tag Pass

    Found 55 characters. Length is optimal.

  • Meta Description Pass

    Found 102 characters. Good snippet length.

  • Canonical URL Pass

    Canonical found: https://eli5.cc

  • Favicon Pass

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

    Favicon
  • Viewport Meta Pass

    Viewport configured: width=device-width, initial-scale=1

  • HTML Lang Pass

    Language declared as "en".

Content Structure

  • H1 Tag Pass

    Exactly one H1 found: "understand anything - with sources you can verify".

  • Heading Hierarchy Warning

    Detected 1 heading level jumps.

    • • Skipped from h2 to h4: "// what you can learn" -> "// product".

    Fix: Follow semantic order (h1 -> h2 -> h3) and avoid skipping heading levels.

  • Image Alt Text Pass

    All 0 images include alt text.

Technical Optimization

  • HTTPS Pass

    Page is served over HTTPS.

  • HSTS & HTTPS Redirect Warning

    2 HTTPS hardening issues detected.

    • • HSTS is missing includeSubDomains.
    • • Could not probe the HTTP version of this page.
    • • Strict-Transport-Security: max-age=63072000

    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, x-frame-options, x-content-type-options, referrer-policy.

    Full HTTP headers (16)
    • • access-control-allow-origin: *
    • • age: 0
    • • cache-control: public, max-age=0, must-revalidate
    • • content-disposition: inline
    • • content-encoding: br
    • • content-type: text/html; charset=utf-8
    • • date: Tue, 28 Apr 2026 09:21:37 GMT
    • • etag: W/"f9f1bd88b1068b074b0b5e27de013cd9"
    • • server: Vercel
    • • strict-transport-security: max-age=63072000
    • • vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
    • • x-matched-path: /
    • • x-nextjs-prerender: 1
    • • x-nextjs-stale-time: 300
    • • x-vercel-cache: PRERENDER
    • • x-vercel-id: iad1::g8gdb-1777368097069-c2a7d4b0525f

    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 0.39s (perceived).

  • Render Blocking Resources Warning

    1 scripts and 1 styles may block rendering.

    • • script: https://eli5.cc/_next/static/chunks/03~yq9q893hmn.js
    • • style: https://eli5.cc/_next/static/chunks/0pns6i7b6eb16.css

    Fix: Defer non-critical scripts and inline critical CSS to improve first paint speed.

  • Compression Pass

    Text-like assets appear compressed.

  • Robots.txt Pass

    Found robots.txt (200).

  • Sitemap File Pass

    Found sitemap (200) at https://eli5.cc/sitemap.xml.

  • Crawl Directives Pass

    Robots meta found: index, follow

Accessibility Basics

  • Form Labels Error

    1 of 1 controls are missing labels.

    • • input[type="text"].eli5-search-input (Try: What is blockchain?)

    Fix: Associate each form control with a visible label, aria-label, or aria-labelledby.

  • Landmarks Pass

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

  • Tap Target Size Warning

    19 interactive elements appear smaller than 48px.

    • • a (explain) - 56x22px
    • • a (explore) - 56x22px
    • • a (use cases) - 72x22px
    • • a (faq) - 24x22px
    • • button.theme-toggle-btn (Toggle theme) - 28x24px
    • • button.eli5-level-btn.active (eli5) - 50x29px
    • • button.eli5-level-btn (eli10) - 57x29px
    • • button.eli5-level-btn (eli15) - 57x29px
    • • button.eli5-level-btn (expert) - 64x29px
    • • button.btn-primary (explain →) - 112x44px
    • • button.example-chip (blockchain) - 92x29px
    • • button.example-chip (inflation) - 85x29px
    • • button.example-chip (how wifi works) - 120x29px
    • • button.example-chip (DNA) - 43x29px
    • • button.example-chip (stock market) - 106x29px
    • • button.example-chip (black holes) - 99x29px
    • • button.example-chip (mutual fund) - 99x29px
    • • button.example-chip (VPN) - 43x29px
    • • a (see the full page →) - 133x20px

    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 Warning

    2 social preview quality issues detected.

    • • ISSUE: Preview image is too small; use at least 200x200.
    • • ISSUE: Preview image is below recommended size (1200x630).
    • • 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: 0.01 MB
    • • MEASURED: Image dimensions: 286x150

    Fix: Use absolute OG/Twitter URLs, keep metadata lengths in recommended ranges, and provide a preview image near 1200x630 under 5MB.

Links Analysis

  • Internal Links Pass

    Checked 24 links. No broken internal links found.

  • External Links Pass

    No broken external links found in checked URLs.

  • Link Format Pass

    All 40 links use non-empty href values.

Performance & Runtime

  • Core Web Vitals: LCP Pass

    Largest Contentful Paint: 0.39s.

  • Core Web Vitals: CLS Pass

    Cumulative Layout Shift: 0.000.

  • Main Thread Blocking (TBT) Pass

    Total Blocking Time estimate: 6ms.

  • Broken Assets Pass

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

  • JavaScript Runtime Errors Warning

    2 JavaScript runtime issues detected.

    • • Request failed: https://eli5.cc/explore?_rsc=1r34m (net::ERR_ABORTED, type: fetch)
    • • Request failed: https://eli5.cc/explore?_rsc=p37cr (net::ERR_ABORTED, type: fetch)

    Fix: Fix JS files returning 404/failed requests and resolve the listed runtime exceptions.