cbdb.cz

https://cbdb.cz· First analyzed 22 May 2026· Updated 22 May 2026

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cbdb.cz

Mobile

Sponsored

Hosting Provider

Ignum s.r.o

IP Address

62.109.155.146

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS29134

Organization

Ignum s.r.o

Server

Nginx

Nameservers

ns2.savana.cz.ns3.savana.cz.ns1.savana.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

915 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.2 MB

165 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Ignum s.r.o

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Advertising

Google Ads Google AdSense Criteo

CSS Frameworks

Libraries

Icon Libraries

Fonts

Tag Managers

Web Servers

SEO Analysis

C69/100

Meta Tags12/15

Content8/12

Headings8/8

Technical19/25

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile3/4

Indexability3/3

cbdb.czcbdb.cz

Vaše databáze knih - knižní databáze | ČBDB.cz

ČBDB.cz - Databáze knih. Životopisy autorů a jejich díla. Rozsáhlá knižní databáze.

Title Length46 chars

Recommended: 50-60 chars (~276px / 580px)

Description Length84 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (46/80) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

40,000 URLs

robots.txt

90 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D44/100

Bot Access

19/25

Machine Read.

13/25

Schema Data

0/25

Citation

12/25

AI Bot Access

12/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:4%

Words:845

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary53w

Descriptive Headingsavg 3.7w

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

60/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

17/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

3/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

38/100

153 mg

CO₂e / view

1.2 MB

Page Weight

70%

Cleaner Than

New Visitor

174 mg

Returning (cached)

87 mg

Annual (10K/mo)

18.3 kg

Emission Segments

Data Center

34 mg

Network

37 mg

Device

82 mg

Resource Breakdown

JavaScript

434.0 KB

Images

620.3 KB

CSS

166.0 KB

Fonts

1.1 KB

HTML

12.2 KB

Other

300 B

Green Hosting Not Verified

Ignum s.r.o

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

55d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

17.04.2026

Valid Until

16.07.2026

Subject Alternative Names (3)

cbdb.czwww.cbdb.czwww.ms.cbdb.cz

SHA-256 Fingerprint

AC:08:DB:0A:EE:1E:7E:08:A6:6F:60:DB:8D:1D:06:25:CD:0C:FF:92...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

12160

content-type

text/html; charset=UTF-8

date

Fri, 22 May 2026 05:06:57 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mx1.savana.cz

mx2.savana.cz

Domain Information

cbdb.cz

Domain Age

16y 8m

Created

08.09.2009

Expires

07.09.2026

Last Updated

15.12.2024

Registrar

REG-WEBGLOBE

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

74/100

Mobile Friendly2 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Source Sans Pro + Arial

WCAG Partial

69/100

Readability

/30

18/30

13px · LH 1.50

Hierarchy

/20

15/20

2.15x ratio · ✓ H1→H6

WCAG

/25

15/25

1:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Source Sans Pro

Sans28px

Body Font

Arial

Sans13px

Contrast Ratio

1:1

15 issues

Reading Comfort

~49 CPL

Optimal (45–75)

28px

24px

18px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~49 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

GGoogle FontsFluid TypeFlesch 40

Color Palette

10 unique colors

Light

#ffffff

Background· 53.1%

#604437

Secondary· 10.5%

#9e0001

Primary· 6.6%

#6a604b

Secondary· 4.6%

#a9958d

Secondary· 4%

#ece3e0

Secondary· 3.5%

#a26c5e

Secondary· 3.1%

#b71b28

Accent· 2%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.cpex.cz(5)googletagmanager.com(3)connect.facebook.net(2)1gr.cz(2)pagead2.googlesyndication.com(2)

Website Identity

cbdb.cz

16 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-WEBGLOBEcs

Social Profiles

Facebook Instagram

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Last analyzed: 22 May 2026 at 05:07

Historical Analysis & Change Tracking