nkp.cz

https://nkp.cz· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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nkp.cz

Mobile

Sponsored

Hosting Provider

NETHOST s.r.o

IP Address

217.16.182.171

Site Location

🇨🇿 Czech Republicvia phone

Server Location

🇨🇿 Prague, Czechia

ASN

AS43541

Organization

NETHOST s.r.o

Nameservers

nsa.ces.net.ns1.nkp.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

919 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1019 KB

77 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

NETHOST s.r.o

Technology Stack

7 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

SEO Analysis

B76/100

Meta Tags7/15

Content11/12

Headings8/8

Technical20/25

E-E-A-T5/7

Images4/7

Links5/5

URL5/5

Social2/5

Freshness2/4

Mobile4/4

Indexability3/3

nkp.cznkp.cz

Národní knihovna České republiky

No description available for this page.

Title Length32 chars

Recommended: 50-60 chars (~191px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

953 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

25/100

Needs Work

7 13

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

1/25

Citation

14/25

AI Bot Access

14/14 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.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:6%

Words:764

Token eff.:Optimal

Sections/1K:30.1

Depth:2/5

Structured Data

1 JSON-LD

Organization×1.1(min)

Citation Readiness

Opening Summary92w

Descriptive Headingsavg 4.5w

Canonical URL

Open Graph0/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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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.

84/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

18/20

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

Forms & Inputs

15/15

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

13/15

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

ARIA & Roles

3/15

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

1 recommendation

•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.

49/100

126 mg

CO₂e / view

1018.8 KB

Page Weight

70%

Cleaner Than

New Visitor

144 mg

Returning (cached)

72 mg

Annual (10K/mo)

15.1 kg

Emission Segments

Data Center

28 mg

Network

30 mg

Device

68 mg

Resource Breakdown

JavaScript

155.9 KB

Images

205.3 KB

CSS

639.7 KB

Fonts

4.6 KB

HTML

13.3 KB

Green Hosting Not Verified

NETHOST s.r.o

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

48d

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

Valid From

18.03.2026

Valid Until

16.06.2026

Subject Alternative Names (2)

nkp.czwww.nkp.cz

SHA-256 Fingerprint

B5:46:12:FA:37:B0:C9:6C:D0:25:1C:20:78:F2:88:A3:F7:64:E2:C9...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

13299

content-type

text/html; charset=UTF-8

date

Tue, 28 Apr 2026 04:28:55 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

fm2.nkp.cz

Domain Information

nkp.cz

Domain Age

31y 6m

Created

03.11.1994

Expires

19.10.2026

Last Updated

22.08.2024

Registrar

REG-ACTIVE24

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

72/100

Mobile Friendly1 breakpoint

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, user-scalable=yes

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Roboto

WCAG Partial

68/100

Readability

/30

18/30

15px · LH 1.20

Hierarchy

/20

15/20

2.67x ratio

WCAG

/25

17/25

1:1 min contrast

Performance

/25

18/25

1 font · 4 req

Heading Font

Roboto

Sans40px

Body Font

Roboto

Sans15px

Contrast Ratio

1:1

1 issue

Reading Comfort

~38 CPL

Narrow lines

40px

28px

20px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Tight line spacing (1.20). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

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

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

GGoogle FontsFluid Type (rem)Flesch 36

Color Palette

9 unique colors

2.06:1 Fail Light

#ffffff

Background· 22.700000000000003%

#b3b5b6

Other· 18.6%

#16789b

Primary· 22.1%

#f1c764

Accent· 10.3%

#6d838a

Secondary· 9.9%

#435157

Secondary· 6.1%

#a99b7d

Secondary· 5.4%

#cdb578

Secondary· 0.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)mccdn.me(2)d70shl7vidtft.cloudfront.net(1)local(1)kookiecheck.cz(1)

Website Identity

Národní knihovna České republiky

Organization

info@nkp.cz

+420 221 663 111

31 years old

Mariánské náměstí 190, Praha 1

110 00, Praha 1

Location detected: 🇨🇿 Czech Republicvia phone

REG-ACTIVE24cs

Social Profiles

Facebook Instagram

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Last analyzed: 28 Apr 2026 at 04:29

Historical Analysis & Change Tracking