Audit Result

Found 54 characters. Length is optimal.

Found 137 characters. Good snippet length.

Canonical link not found.

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

Favicon found and reachable: /site/assets/logo/favicon.svg?v=white-rings (HTTP 200).

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

Language declared as "en".

Exactly one H1 found: "Test production conditions. Find what breaks before you ship.".

Valid heading flow across 34 headings.

56 of 93 images are missing alt text.

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

Page is served over HTTPS.

1 HTTPS hardening issues detected.

• • Could not probe the HTTP version of this page.
• • Strict-Transport-Security: max-age=31536000; includeSubDomains

Fix: Set Strict-Transport-Security with a long max-age, add includeSubDomains, and redirect all HTTP requests to HTTPS.

Core security headers were detected.

1 CSP hardening issues detected.

• • script-src/default-src permits 'unsafe-inline'.
• • Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' https://analytics.agenttwin.si https://analytics.hirealpha.chat https://us-assets.i.posthog.com https://eu-assets.i.posthog.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: https://us-assets.i.posthog.com https://eu-assets.i.posthog.com; font-src 'self'; connect-src 'self' https://api.agenttwin.si https://analytics.agenttwin.si https://analytics.hirealpha.chat https://us.i.posthog.com https://eu.i.posthog.com; media-src 'self'; object-src 'none'; frame-ancestors 'self'; base-uri 'self'; form-action 'self'

Fix: Tighten Content-Security-Policy by removing unsafe directives and adding object-src, base-uri, and frame-ancestors restrictions.

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

Versioned headers detected: server.

• • server: nginx/1.31.7

Fix: Hide or remove version tokens in Server and X-Powered-By headers.

Domain does not appear to be behind Cloudflare.

Loaded in 1.60s (perceived).

Fix: Reduce payload size, cache static assets, and remove non-critical JS from initial load.

1 scripts and 1 styles may block rendering.

• • script: https://agenttwin.si/_next/static/chunks/polyfills-42372ed130431b0a.js
• • style: https://agenttwin.si/_next/static/css/81a1668ab34a36e8.css

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

2 text resources look uncompressed.

• • https://agenttwin.si/_next/static/chunks/main-app-b0df98c6f983cf7b.js (application/javascript)
• • https://agenttwin.si/_next/static/chunks/app/layout-c394d817bbfb01f0.js (application/javascript)

Fix: Enable Brotli or Gzip compression for HTML, CSS, JS, and JSON responses.

Found robots.txt (200).

Found sitemap (200) at https://agenttwin.si/sitemap.xml.

No robots meta tag defined.

Fix: Add <meta name="robots" content="index,follow"> (or the intended directive) in <head>.

All 0 controls are labeled.

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

22 interactive elements appear smaller than 48px.

• • a.brand (AgentTwin home) - 163x36px
• • a (Worlds) - 40x20px
• • a (How it works) - 74x20px
• • a (Failures) - 44x20px
• • a (Pricing) - 39x20px
• • a (Enterprise) - 58x20px
• • a (Docs) - 29x20px
• • a (Sign in) - 47x24px
• • a.button.button-white (Get started ») - 118x35px
• • button.button.button-outline (Copy npx agenttwin init) - 229x40px
• • a (Create a replica) - 200x37px
• • a (Run your workflow) - 200x37px
• • a (Introduce failures) - 200x37px
• • a (Inspect and rerun) - 200x37px
• • a.text-link (See the fidelity contract ↗) - 354x20px
• • a.text-link (Walk through a run ↗) - 354x20px
• • a.text-link (Explore failure conditions ↗) - 354x20px
• • a.text-link (Try the complete journey ↗) - 354x20px
• • button#preview-tab-replica (Create a replica) - 114x36px
• • button#preview-tab-faults (Introduce failures) - 125x36px
• • button#preview-tab-result (Inspect the result) - 124x36px
• • button#preview-tab-explain (Explain the result) - 123x36px

Fix: Increase target size to at least 48x48 CSS pixels for touch interactions.

Missing og:title or og:description.

Fix: Add og:title and og:description tags to control social preview text.

og:image is missing.

Fix: Add <meta property="og:image" content="https://..."> with a high-quality share image.

twitter:card is missing.

Fix: Add <meta name="twitter:card" content="summary_large_image"> for better previews on X.

No JSON-LD schema scripts found.

Fix: Add JSON-LD structured data matching your page type (Organization, Article, Product, etc.).

Manifest or Apple touch icon is missing.

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

5 social preview quality issues detected.

• • ISSUE: og:url should be an absolute URL.
• • ISSUE: og:title should typically be between 10 and 70 characters.
• • ISSUE: og:description should typically be between 50 and 200 characters.
• • ISSUE: Use an absolute URL for og:image or twitter:image.
• • ISSUE: twitter:card is missing.
• • 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.

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

Checked 16 links. No broken internal links found.

No broken external links found in checked URLs.

All 49 links use non-empty href values.

Largest Contentful Paint: 1.60s.

Cumulative Layout Shift: 0.000.

Total Blocking Time estimate: 0ms.

1 asset requests failed.

• • https://agenttwin.si/site/assets/icons/co-sentry.png (HTTP 404)

Fix: Fix missing files, update asset URLs, and ensure static assets return HTTP 200.

1 JavaScript runtime issues detected.

• • Failed to load resource: the server responded with a status of 404 () [https://agenttwin.si/site/assets/icons/co-sentry.png:1]

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