Audit Result

Found 6 characters. Keep title between 30 and 60 characters.

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

Found 149 characters. Good snippet length.

Canonical found: https://appduobot.com/

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

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

Language declared as "en".

Exactly one H1 found: "Lessons that finish themselves.".

Detected 1 heading level jumps.

• • Skipped from h2 to h4: "Your streak called. Duobot answered." -> "Product".

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

3 of 11 images are missing alt text.

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

Page is served over HTTPS.

2 HTTPS hardening issues detected.

• • Missing Strict-Transport-Security header.
• • Could not probe the HTTP version of this page.

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

Missing: strict-transport-security, content-security-policy.

Fix: Add the missing security headers at your reverse proxy or application layer.

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.

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

Server response headers do not expose version tokens.

Domain does not appear to be behind Cloudflare.

Loaded in 1.01s (perceived).

0 scripts and 4 styles may block rendering.

• • style: https://fonts.googleapis.com/css2?family=Fredoka:wght@500;600;700&family=Nunito:ital,wght@0,600;0,700;0,800;0,900;1,900&display=swap
• • style: https://appduobot.com/assets/ext/ui/DuobotUI.css
• • style: https://appduobot.com/assets/ext/main.css
• • style: https://appduobot.com/assets/css/duobot.css

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

Text-like assets appear compressed.

Found robots.txt (200).

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

No robots meta tag defined.

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

2 of 21 controls are missing labels.

• • input[type="text"].db-remind-label (Note, optional)
• • textarea.db-code.db-console-input (Paste a command and press Run. Try: 1+1)

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

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

24 interactive elements appear smaller than 48px.

• • a.brand (Duobot home) - 219x38px
• • a (How it works) - 146x41px
• • a (Pricing) - 88x41px
• • a (Guide) - 73x41px
• • a (FAQ) - 55x41px
• • a (Support) - 96x41px
• • button.lang-btn (Language: English) - 98x40px
• • a.btn.btn--sm (Add to Chrome) - 192x40px
• • button.db-node-btn.db-chip-start - 27x27px
• • button.lesson__x (Close) - 32x32px
• • button.btn.btn--ghost (Skip) - 91x46px
• • button.btn.is-disabled (Check) - 109x46px
• • button.btn (Continue) - 139x46px
• • button.db-icon-btn.db-remind - 34x34px
• • button.db-icon-btn.db-account - 34x34px
• • button.db-preset-btn (Fast) - 91x34px
• • button.db-preset-btn.is-active (Default) - 91x34px
• • button.db-preset-btn (Slow) - 91x34px
• • button.db-btn.db-btn-solve (Auto-Solve) - 178x42px
• • button.db-hotkey (Alt+Enter) - 104x42px
• • button.db-btn.db-btn-skip (Solve & Skip) - 178x42px
• • button.db-hotkey (Ctrl+Enter) - 104x42px
• • button.db-btn.db-btn-auto (Auto-Run) - 178x42px
• • button.db-hotkey (Shift+Enter) - 104x42px

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

Core Open Graph tags are present.

og:image is present and absolute.

twitter:card set to summary_large_image.

No JSON-LD schema scripts found.

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

Manifest and Apple touch icon are configured.

1 social preview quality issues detected.

• • ISSUE: og:title should typically be between 10 and 70 characters.
• • 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: 0.26 MB
• • MEASURED: Image dimensions: 1200x630

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

Checked 10 links. No broken internal links found.

No broken external links found in checked URLs.

All 36 links use non-empty href values.

Largest Contentful Paint: 6.61s.

Fix: Improve LCP by optimizing above-the-fold media, reducing server latency, and inlining critical CSS.

Cumulative Layout Shift: 0.094.

Total Blocking Time estimate: 6985ms.

Fix: Reduce heavy JavaScript work, split long tasks, and defer non-critical scripts.

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

No console/page runtime errors detected during audit.