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https://knihobot.cz
Compared to previous audit · 4 minutes ago View previous audit

Madrid, Spain → New York, United Stated

These audits ran from different locations. Timing metrics (TTFB, DNS, TLS) may reflect network path differences rather than site changes.

11
New issues
8
Resolved
13
score changes
CategoryPreviousCurrentChange
CompositeB (81)B (81)—
PerformanceC (78)C (78)—
SecurityC (78)C (78)—
AccessibilityB (82)B (82)—
SEOA (93)A (93)—
InfrastructureA (90)A (90)—
ComplianceC (79)C (79)—
ContentC (76)C (76)—
SustainabilityD (65)D (65)—
MetricPreviousCurrentChange
Performance 39003200 -700
Accessibility 93009300—
Best Practices 96009600—
SEO 1000010000—
PWA 00—
Desktop Performance 59006900 +1000
Desktop Accessibility 88008800—
Desktop Best Practices 1000010000—
Desktop SEO 1000010000—
FCP 2.47 s3.62 s +1.14 s
LCP 9.30 s16.80 s +7.50 s
TBT 5.67 s3.05 s -2.62 s
CLS 0.0000.000—
Desktop FCP 877 ms754 ms -123 ms
Desktop LCP 1.64 s1.58 s -58 ms
Desktop TBT 1.60 s606 ms -989 ms
Desktop CLS 0.0000.000—
TTFB †449 ms215 ms -235 ms
DNS †7 ms27 ms +20 ms
TLS †87 ms29 ms -58 ms
Connect †84 ms27 ms -57 ms
Total †456 ms242 ms -214 ms

† Timing metrics may vary by worker location and do not necessarily indicate site changes.

WARNING 16 render-blocking stylesheet(s) -- recommended: <=3 performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-000&...: 69 KB unused (47%) performance
WARNING https://c77.bookbot.com/_next/static/chunks/framew...: 2977ms CPU time performance
WARNING Total JS execution time is 6.8 s -- over the 3.5s budget performance
WARNING https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 431ms CPU time performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-N116...: 72 KB unused (40%) performance
WARNING Unattributable: 749ms CPU time performance
WARNING Third-party scripts: 5150ms (76% of total) performance
WARNING 4 tap target(s) too small or too close to neighbors accessibility
WARNING https://knihobot.cz/: 909ms CPU time performance
WARNING https://c77.bookbot.com/_next/static/chunks/pages/...: 369ms CPU time performance
WARNING https://knihobot.cz/: 2756ms CPU time performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-N116...: 72 KB unused (39%) performance
WARNING https://c77.bookbot.com/_next/static/chunks/pages/...: 1032ms CPU time performance
WARNING https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 840ms CPU time performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (47%) performance
WARNING https://c77.bookbot.com/_next/static/chunks/framew...: 5734ms CPU time performance
WARNING Third-party scripts: 10505ms (75% of total) performance
WARNING Unattributable: 832ms CPU time performance
CRITICAL Content-Security-Policy header is missing security
CRITICAL Transfer efficiency: 45% sustainability
CRITICAL 1 link(s) with no accessible text accessibility
CRITICAL Cookie 'adonis-session' is missing the Secure flag security
CRITICAL No H1 heading found accessibility
CRITICAL 1 button(s) with no accessible text accessibility
WARNING 4 images significantly larger than display size content
WARNING HSTS is enabled but max-age is short (15724800s, should be >= 31536000s) security
WARNING Cross-Origin-Embedder-Policy header is missing security
WARNING No name or short_name accessibility
WARNING JavaScript is 1.5 MB — consider code splitting or lazy loading performance
WARNING Third-party code accounts for 98% of page weight (2.2 MiB of 2.3 MiB) performance
WARNING https://www.googletagmanager.com/gtag/destination?...: 75 KB unused (47%) performance
WARNING Page weight 2.3 MB exceeds 1 MB target by 1.3 MB performance
WARNING Cookie 'adonis-session' has no SameSite attribute security
WARNING 567 inline style attribute(s) detected security
WARNING 121 third-party resources (98% of weight) performance
WARNING 1 internal links have no anchor text seo
WARNING Broken link: https://rezised-images.knhbt.cz content
WARNING External script from mhubc.knihobot.cz lacks integrity attribute security
WARNING External link from c77.bookbot.com lacks integrity attribute security
WARNING 6 of 7 <nav> elements are unlabeled accessibility
WARNING No accessibility statement detected compliance
WARNING No Permissions-Policy header security
WARNING https://c77.bookbot.com/_next/static/chunks/5581-5...: 138 KB unused (73%) performance
WARNING Broken link: https://www.googleadservices.com content
WARNING Registrar lock is NOT enabled infrastructure
WARNING X-Content-Type-Options header is missing security
WARNING Referrer-Policy header is missing security
WARNING SRI adoption: 0/62 third-party resources protected (0%) security
WARNING 1 link(s) open in a new tab without rel=noopener security
WARNING Broken link: https://www.googletagmanager.com content
WARNING Permissions-Policy header is missing security
WARNING Skip navigation link is missing (WCAG 2.4.1) accessibility
WARNING 0.65g CO2 — above the median website (0.60g) sustainability
WARNING No Open Graph meta tags found content
WARNING 1 images missing alt text content
WARNING Cross-Origin-Opener-Policy header is missing security
WARNING External script from l.seznam.cz lacks integrity attribute security
WARNING 128 HTTP requests — consider bundling or reducing performance
WARNING External script from c77.bookbot.com lacks integrity attribute security
WARNING 1 image(s) with generic alt text accessibility
WARNING 14 images missing explicit width/height content
WARNING Missing required property "name" for WebSite content
WARNING X-Frame-Options header is missing security
WARNING External script from www.googletagmanager.com lacks integrity attribute security
WARNING DMARC policy is none — monitoring only security
WARNING 6 link(s) open in new tab without warning accessibility
WARNING X-Powered-By header reveals technology stack security
WARNING 197 of 200 links are healthy content
etag
"124vjvcm3mz9kcn" → "117ud8xmlrq9kcp"
set-cookie
adonis-session=s%3AeyJtZXNzYWdlIjoibnVqeTIwYnB2a3NubGQ5aTVtbGw0d2w3IiwicHVycG... → adonis-session=s%3AeyJtZXNzYWdlIjoiYnhpMG42ZzYwN3B2eDAyY2RibGFoM2F2IiwicHVycG...

6 headers unchanged

Technology stack unchanged

21 technologies unchanged

Looking ahead

+16 pts
B (81) Could reach A+ (97)
Content +22Performance +22Security +22Accessibility +18Sustainability +14Compliance +4Infrastructure +4SEO +4

Estimate — actual results may vary (61 issues to fix)

Website improvement report — Knihobot

September 8, 2026 → September 8, 2026

B B 81 → 81 0 pts

8

Resolved

11

New issues

50

Still remaining

Financial summary

Investment delivered

Kč24,200 in development time

Investment remaining

Kč103,125 to complete the remaining items

Ongoing risk

Kč13/month in ongoing exposure

Figures are estimates based on local developer hourly rate, industry CPC, and regulatory fine ranges.

Performance by category

MetricBeforeAfterChange
Overall score81 (B)81 (B)0
Performance78 (C)78 (C)0
Security78 (C)78 (C)0
Accessibility82 (B)82 (B)0
SEO93 (A)93 (A)0
Infrastructure90 (A)90 (A)0
Compliance79 (C)79 (C)0
Content76 (C)76 (C)0
Sustainability65 (D)65 (D)0

Resolved (8)

  • https://knihobot.cz/: 2756ms CPU time (Performance)

    → Page loads faster for users

  • https://www.googletagmanager.com/gtag/js?id=G-N116...: 72 KB unused (39%) (Performance)

    → Page loads faster for users

  • https://c77.bookbot.com/_next/static/chunks/pages/...: 1032ms CPU time (Performance)

    → Page loads faster for users

  • https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 840ms CPU time (Performance)

    → Page loads faster for users

  • https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (47%) (Performance)

    → Page loads faster for users

  • https://c77.bookbot.com/_next/static/chunks/framew...: 5734ms CPU time (Performance)

    → Page loads faster for users

  • Third-party scripts: 10505ms (75% of total) (Performance)

    → Page loads faster for users

  • Unattributable: 832ms CPU time (Performance)

    → Page loads faster for users

Recommended next steps (61)

  • Sprint 2

    Content-Security-Policy header is missing (Security)

  • Sprint 1

    Transfer efficiency: 45% (Sustainability)

  • Sprint 1

    1 link(s) with no accessible text (Accessibility)

  • Sprint 1

    Cookie 'adonis-session' is missing the Secure flag (Security)

  • Sprint 1

    No H1 heading found (Accessibility)

  • Sprint 1

    1 button(s) with no accessible text (Accessibility)

  • Sprint 1

    16 render-blocking stylesheet(s) -- recommended: <=3 (Performance)

  • Sprint 3

    https://www.googletagmanager.com/gtag/js?id=G-000&...: 69 KB unused (47%) (Performance)

  • Sprint 1

    https://c77.bookbot.com/_next/static/chunks/framew...: 2977ms CPU time (Performance)

  • Sprint 2

    Total JS execution time is 6.8 s -- over the 3.5s budget (Performance)

  • Sprint 1

    https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 431ms CPU time (Performance)

  • Sprint 3

    https://www.googletagmanager.com/gtag/js?id=G-N116...: 72 KB unused (40%) (Performance)

  • Sprint 1

    Unattributable: 749ms CPU time (Performance)

  • Sprint 3

    Third-party scripts: 5150ms (76% of total) (Performance)

  • Sprint 1

    4 tap target(s) too small or too close to neighbors (Accessibility)

…and 46 more recommended item(s)

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