Audit Result

UUID: 019df2a8-6abc-722e-8216-e79670745130

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biostacks.co

https://biostacks.co/

Scanned 4 months ago

82
Fair Score
39 total checks
Passed
26
Warnings
12
Errors
1

Meta Information

  • Title Tag Warning

    Found 28 characters. Keep title between 30 and 60 characters.

    Fix: Add a unique <title> tag describing the main page intent in 30-60 characters.

  • Meta Description Pass

    Found 120 characters. Good snippet length.

  • Canonical URL Pass

    Canonical found: https://biostacks.co

  • Favicon Pass

    Favicon found and reachable: /favicon.ico (HTTP 200).

    Favicon
  • Viewport Meta Pass

    Viewport configured: width=device-width, initial-scale=1, maximum-scale=1, viewport-fit=cover

  • HTML Lang Pass

    Language declared as "en".

Content Structure

  • H1 Tag Pass

    Exactly one H1 found: "Supplement Scanner & Tracker".

  • Heading Hierarchy Warning

    Detected 1 heading level jumps.

    • • Skipped from h1 to h3: "Supplement Scanner & Tracker" -> "Navigate".

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

  • Image Alt Text Error

    1 of 5 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

    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 (14)
    • • access-control-allow-origin: *
    • • age: 4493
    • • cache-control: public, max-age=0, must-revalidate
    • • content-disposition: inline
    • • content-encoding: br
    • • content-type: text/html; charset=utf-8
    • • date: Mon, 04 May 2026 11:03:23 GMT
    • • etag: W/"ff1dd5a53c886b434d653290b3ac6239"
    • • server: Vercel
    • • strict-transport-security: max-age=63072000
    • • vary: RSC, Next-Router-State-Tree, Next-Router-Prefetch
    • • x-matched-path: /
    • • x-vercel-cache: HIT
    • • x-vercel-id: iad1::nrdzr-1777892603561-ec54c1b94f4e

    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 0.62s (perceived).

  • Render Blocking Resources Warning

    1 scripts and 2 styles may block rendering.

    • • script: https://biostacks.co/_next/static/chunks/polyfills-42372ed130431b0a.js
    • • style: https://biostacks.co/_next/static/css/3498b2de31d21d5b.css
    • • style: https://biostacks.co/_next/static/css/0909917fc6f44dd9.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://biostacks.co/sitemap.xml.

  • Crawl Directives Pass

    Robots meta found: index, follow

Accessibility Basics

  • Form Labels Pass

    All 0 controls are labeled.

  • Landmarks Warning

    Missing landmarks: header, nav.

    Fix: Use semantic regions (<header>, <nav>, <main>, <footer>) for navigation and assistive tech.

  • Tap Target Size Warning

    1 interactive elements appear smaller than 48px.

    • • a.flex.items-center (BioStacks) - 264x28px

    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 Warning

    Manifest or Apple touch icon is missing.

    Fix: Link your web app manifest and apple-touch-icon for improved install/share experiences.

  • Open Graph/Twitter Quality Warning

    1 social preview quality issues detected.

    • • 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: 0.50 MB
    • • MEASURED: Image dimensions: 1200x600

    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 14 links. No broken internal links found.

  • External Links Warning

    1 external links returned errors or timed out.

    • • https://apps.apple.com/us/app/supplement-scanner-biostacks/id6758149582 (HTTP 429)

    Fix: Replace dead external URLs or point to working alternatives.

  • Link Format Pass

    All 18 links use non-empty href values.

Performance & Runtime