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Changes

https://knihobot.cz
Compared to previous audit · 1 hour ago View previous audit

New York, United Stated → Amsterdam, Netherlands

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

17
New issues
11
Resolved
16
score changes
CategoryPreviousCurrentChange
CompositeC (79)B (81) +2.000
PerformanceC (77)C (78) +1.000
SecurityC (78)C (78)—
AccessibilityB (82)B (82)—
SEOA (93)A (93)—
InfrastructureA (90)A (90)—
ComplianceD (58)C (79) +21.000
ContentC (76)C (76)—
SustainabilityD (65)D (65)—
MetricPreviousCurrentChange
Performance 31003900 +800
Accessibility 93009300—
Best Practices 96009600—
SEO 1000010000—
PWA 00—
Desktop Performance 63005900 -400
Desktop Accessibility 88008800—
Desktop Best Practices 1000010000—
Desktop SEO 1000010000—
FCP 3.54 s2.47 s -1.07 s
LCP 13.23 s9.30 s -3.93 s
TBT 9.49 s5.67 s -3.82 s
CLS 0.0000.000—
Desktop FCP 587 ms877 ms +290 ms
Desktop LCP 1.36 s1.64 s +278 ms
Desktop TBT 1.89 s1.60 s -294 ms
Desktop CLS 0.0000.000—
TTFB †116 ms449 ms +333 ms
DNS †6 ms7 ms +1 ms
TLS †12 ms87 ms +75 ms
Connect †7 ms84 ms +77 ms
Total †125 ms456 ms +332 ms

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

CRITICAL Transfer efficiency: 45% sustainability
WARNING https://knihobot.cz/: 2756ms CPU time performance
WARNING HSTS is enabled but max-age is short (15724800s, should be >= 31536000s) security
WARNING https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (47%) performance
WARNING https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 840ms CPU time performance
WARNING Unattributable: 832ms CPU time performance
WARNING Total JS execution time is 14.1 s -- over the 3.5s budget performance
WARNING SRI adoption: 0/62 third-party resources protected (0%) security
WARNING https://c77.bookbot.com/_next/static/chunks/pages/...: 1032ms CPU time performance
WARNING Third-party scripts: 10505ms (75% of total) performance
WARNING 4 tap target(s) too small or too close to neighbors accessibility
WARNING https://c77.bookbot.com/_next/static/chunks/framew...: 5734ms CPU time performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-N116...: 72 KB unused (39%) performance
WARNING External script from l.seznam.cz lacks integrity attribute security
WARNING External script from www.googletagmanager.com lacks integrity attribute security
WARNING External script from mhubc.knihobot.cz lacks integrity attribute security
WARNING 16 render-blocking stylesheet(s) -- recommended: <=3 performance
CRITICAL Transfer efficiency: 46% sustainability
WARNING Third-party scripts: 13293ms (76% of total) performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (46%) performance
WARNING SRI adoption: 0/48 third-party resources protected (0%) security
WARNING https://c77.bookbot.com/_next/static/chunks/framew...: 6986ms CPU time performance
WARNING Unattributable: 1410ms CPU time performance
WARNING HSTS max-age is too short (15724800s, should be ≥ 31536000s) security
WARNING https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 1156ms CPU time performance
WARNING https://c77.bookbot.com/_next/static/chunks/5803-4...: 1120ms CPU time performance
WARNING https://knihobot.cz/: 2742ms CPU time performance
WARNING https://www.googletagmanager.com/gtag/js?id=G-N116...: 73 KB unused (40%) performance
CRITICAL Content-Security-Policy header is missing security
CRITICAL Cookie 'adonis-session' is missing the Secure flag security
CRITICAL 1 link(s) with no accessible text accessibility
CRITICAL No H1 heading found accessibility
CRITICAL 1 button(s) with no accessible text accessibility
WARNING Skip navigation link is missing (WCAG 2.4.1) accessibility
WARNING Broken link: https://www.googleadservices.com content
WARNING Broken link: https://www.googletagmanager.com content
WARNING 4 images significantly larger than display size content
WARNING Cross-Origin-Opener-Policy header is missing security
WARNING 128 HTTP requests — consider bundling or reducing performance
WARNING 567 inline style attribute(s) detected security
WARNING External link from c77.bookbot.com lacks integrity attribute security
WARNING No Permissions-Policy header security
WARNING 14 images missing explicit width/height content
WARNING Page weight 2.3 MB exceeds 1 MB target by 1.3 MB performance
WARNING No Open Graph meta tags found content
WARNING DMARC policy is none — monitoring only security
WARNING Cross-Origin-Embedder-Policy header is missing security
WARNING https://www.googletagmanager.com/gtag/destination?...: 75 KB unused (47%) performance
WARNING No name or short_name accessibility
WARNING 197 of 200 links are healthy content
WARNING 6 of 7 <nav> elements are unlabeled accessibility
WARNING X-Frame-Options header is missing security
WARNING Cookie 'adonis-session' has no SameSite attribute security
WARNING JavaScript is 1.5 MB — consider code splitting or lazy loading performance
WARNING https://c77.bookbot.com/_next/static/chunks/5581-5...: 138 KB unused (73%) performance
WARNING 121 third-party resources (98% of weight) performance
WARNING Third-party code accounts for 98% of page weight (2.2 MiB of 2.3 MiB) performance
WARNING Missing required property "name" for WebSite content
WARNING 0.65g CO2 — above the median website (0.60g) sustainability
WARNING External script from c77.bookbot.com lacks integrity attribute security
WARNING 1 image(s) with generic alt text accessibility
WARNING Registrar lock is NOT enabled infrastructure
WARNING 6 link(s) open in new tab without warning accessibility
WARNING X-Content-Type-Options header is missing security
WARNING Referrer-Policy header is missing security
WARNING Permissions-Policy header is missing security
WARNING X-Powered-By header reveals technology stack security
WARNING 1 link(s) open in a new tab without rel=noopener security
WARNING 1 internal links have no anchor text seo
WARNING Broken link: https://rezised-images.knhbt.cz content
WARNING No accessibility statement detected compliance
WARNING 1 images missing alt text content
etag
"46x64mqjo9kcp" → "124vjvcm3mz9kcn"
set-cookie
adonis-session=s%3AeyJtZXNzYWdlIjoia25sbWpxZ3R6d2Z3Yzg4eDMya3Y5NmVwIiwicHVycG... → adonis-session=s%3AeyJtZXNzYWdlIjoibnVqeTIwYnB2a3NubGQ5aTVtbGw0d2w3IiwicHVycG...

6 headers unchanged

+ Google Analytics Analytics
+ Lodash JavaScript libraries v4.17.21
+ core-js JavaScript libraries v3.49.0

18 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

C B 79 → 81 +2 pts

11

Resolved

17

New issues

44

Still remaining

Financial summary

Investment delivered

Kč24,292 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 score79 (C)81 (B)+2
Performance77 (C)78 (C)+1
Security78 (C)78 (C)0
Accessibility82 (B)82 (B)0
SEO93 (A)93 (A)0
Infrastructure90 (A)90 (A)0
Compliance58 (D)79 (C)+21
Content76 (C)76 (C)0
Sustainability65 (D)65 (D)0

Resolved (11)

  • Transfer efficiency: 46% (Sustainability)

    → Lower carbon footprint per page view

  • Third-party scripts: 13293ms (76% of total) (Performance)

    → Page loads faster for users

  • https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (46%) (Performance)

    → Page loads faster for users

  • SRI adoption: 0/48 third-party resources protected (0%) (Security)

    → Reduced attack surface for visitors

  • https://c77.bookbot.com/_next/static/chunks/framew...: 6986ms CPU time (Performance)

    → Page loads faster for users

  • Unattributable: 1410ms CPU time (Performance)

    → Page loads faster for users

  • HSTS max-age is too short (15724800s, should be ≥ 31536000s) (Security)

    → Reduced attack surface for visitors

  • https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 1156ms CPU time (Performance)

    → Page loads faster for users

  • https://c77.bookbot.com/_next/static/chunks/5803-4...: 1120ms CPU time (Performance)

    → Page loads faster for users

  • https://knihobot.cz/: 2742ms CPU time (Performance)

    → Page loads faster for users

  • https://www.googletagmanager.com/gtag/js?id=G-N116...: 73 KB unused (40%) (Performance)

    → Page loads faster for users

Recommended next steps (61)

  • Sprint 1

    Transfer efficiency: 45% (Sustainability)

  • Sprint 2

    Content-Security-Policy header is missing (Security)

  • Sprint 1

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

  • Sprint 1

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

  • Sprint 1

    No H1 heading found (Accessibility)

  • Sprint 1

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

  • Sprint 1

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

  • Sprint 1

    HSTS is enabled but max-age is short (15724800s, should be >= 31536000s) (Security)

  • Sprint 3

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

  • Sprint 1

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

  • Sprint 1

    Unattributable: 832ms CPU time (Performance)

  • Sprint 2

    Total JS execution time is 14.1 s -- over the 3.5s budget (Performance)

  • Sprint 1

    SRI adoption: 0/62 third-party resources protected (0%) (Security)

  • Sprint 1

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

  • Sprint 3

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

…and 46 more recommended item(s)

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