techlib.cz

https://techlib.cz· First analyzed 16 May 2026· Updated 16 May 2026

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techlib.cz

Mobile

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Hosting Provider

National Library of Technology

IP Address

195.113.241.64

Site Location

🇨🇿 Czech Republicvia phone

Server Location

🇨🇿 Prague, Czechia

ASN

AS2852

Organization

National Library of Technology

Server

Apache

Nameservers

ns.techlib.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

747 ms10%

Speed Index

971 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.4 MB

98 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

National Library of Technology

Technology Stack

7 Technologies Detected

Languages

PHPv7.4.27 Pythonv2.7.5

Libraries

Other

CSS Frameworks

Analytics

Web Servers

SEO Analysis

D59/100

Meta Tags8/15

Content12/12

Headings3/8

Technical12/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability0/3

techlib.cztechlib.cz

Czech National Library of Technology

Národní technická knihovna

Title Length36 chars

Recommended: 50-60 chars (~214px / 580px)

Description Length26 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Page is set to noindex — will not appear in search results

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,860 URLs

robots.txt

Local SEO

Local Search Readiness

23/100

Needs Work

7 9 2

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AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

10/25

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

nav

Text ratio:8%

Words:1,133

Token eff.:Optimal

Sections/1K:14.1

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 2.8w

Canonical URL

Open Graph2/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

77/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

9/20

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

Forms & Inputs

10/15

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

10/15

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.

22/100

176 mg

CO₂e / view

1.4 MB

Page Weight

60%

Cleaner Than

New Visitor

201 mg

Returning (cached)

101 mg

Annual (10K/mo)

21.1 kg

Emission Segments

Data Center

39 mg

Network

42 mg

Device

94 mg

Resource Breakdown

JavaScript

245.5 KB

Images

458.6 KB

CSS

608.9 KB

HTML

110.1 KB

Green Hosting Not Verified

National Library of Technology

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

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

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

05.04.2026

Valid Until

04.07.2026

Subject Alternative Names (2)

techlib.czwww.techlib.cz

SHA-256 Fingerprint

B4:2D:5F:7C:D0:17:1B:37:9A:D2:38:91:7A:0B:45:A8:AE:A1:F1:1C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

connection

Keep-Alive

content-type

text/html; charset=UTF-8

date

Sat, 16 May 2026 22:37:28 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

keep-alive

timeout=5, max=99

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mta.techlib.cz

Domain Information

techlib.cz

Domain Age

18 years

Created

19.05.2008

Expires

18.05.2027

Last Updated

05.05.2025

Registrar

REG-ACTIVE24

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

60/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Univers-Regular-Bold + Univers-Light

WCAG Partial

59/100

Readability

/30

22/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

11/25

2 fonts · 6 req

Heading Font

Univers-Regular-Bold

Sans

Body Font

Univers-Light

Sans14px

Contrast Ratio

1:1

1 issue

Reading Comfort

~37 CPL

Narrow lines

24px

20px

16px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

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

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

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

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 46

Color Palette

7 unique colors

3.98:1 AA Large Light

#ffffff

Background· 59.4%

#7d8080

Other· 8.8%

#d31d35

Primary· 0%

#b71924

Accent· 7%

#b79b9b

Secondary· 3.4%

#d1bfbf

Secondary· 3.1%

#a3595c

Secondary· 1.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)matomo.techlib.cz(1)

Website Identity

techlib.cz

info@techlib.cz

+420232002535

18 years old

Location detected: 🇨🇿 Czech Republicvia phone

REG-ACTIVE24en

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 16 May 2026 at 22:37

Historical Analysis & Change Tracking