ntm.cz

https://ntm.cz· First analyzed 12 May 2026· Updated 12 May 2026

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ntm.cz

Mobile

Sponsored

Hosting Provider

Nethost s.r.o.

IP Address

217.11.242.132

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS15685

Organization

Nethost s.r.o.

Nameservers

names.dialtelecom.cz.sns.dialtelecom.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

806 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5.9 MB

103 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Nethost s.r.o.

Technology Stack

6 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Fonts

SEO Analysis

C67/100

Meta Tags4/15

Content10/12

Headings8/8

Technical20/25

E-E-A-T5/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

ntm.czntm.cz

Národní technické muzeum

No description available for this page.

Title Length24 chars

Recommended: 50-60 chars (~152px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Most images missing alt text (62/118) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,372 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

12/100

Poor

3 13 1

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

Sponsored

AI & LLM Readiness

D43/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

1/25

Citation

9/25

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:7%

Words:1,182

Token eff.:Optimal

Sections/1K:1.7

Depth:1/5

Structured Data

1 JSON-LD

Organization×1.1(min)

Citation Readiness

Opening Summary418w

Descriptive Headingsavg 4w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

75/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

20/20

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

10/15

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

ARIA & Roles

5/15

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

2 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.

23/100

744 mg

CO₂e / view

5.9 MB

Page Weight

Cleaner Than

New Visitor

850 mg

Returning (cached)

425 mg

Annual (10K/mo)

89.3 kg

Emission Segments

Data Center

166 mg

Network

179 mg

Device

399 mg

Resource Breakdown

JavaScript

147.3 KB

Images

5.0 MB

CSS

717.0 KB

Fonts

2.2 KB

HTML

17.9 KB

Green Hosting Not Verified

Nethost s.r.o.

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

74d

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

26.04.2026

Valid Until

25.07.2026

Subject Alternative Names (3)

admin.ntm.czntm.czwww.ntm.cz

SHA-256 Fingerprint

24:35:26:16:61:36:2E:27:83:64:83:DB:2F:0E:4B:EE:33:17:96:CC...

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

18068

content-security-policy-report-only

upgrade-insecure-requests; default-src 'none'; object-src 's...

content-type

text/html; charset=UTF-8

date

Tue, 12 May 2026 05:43:45 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

dx.spamfree.cz

bx.virusfree.cz

gw.ntm.cz

cx.spamfree.cz

+1 more

Domain Information

ntm.cz

Domain Age

27y 1m

Created

13.04.1999

Expires

10.10.2026

Last Updated

12.10.2005

Registrar

REG-QUANTCOM

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.

67/100

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

zeppelin31

WCAG Partial

66/100

Readability

/30

20/30

16px · LH 1.80

Hierarchy

/20

20/20

3x ratio · ✓ H1→H6

WCAG

/25

13/25

1:1 min contrast

Performance

/25

13/25

1 font · 5 req

Heading Font

zeppelin31

Sans48px

Body Font

zeppelin31

Sans16px

Contrast Ratio

1:1

9 issues

Reading Comfort

~39 CPL

Narrow lines

48px

32px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

GGoogle Fonts Buy on MyFontsFluid TypeFlesch 42

Color Palette

14 unique colors

2.39:1 Fail Dark

#6d665e

Other· 8.3%

#342d2b

Text· 6.8%

#100d0d

Secondary· 18.5%

#d21c23

Primary· 11.7%

#b2ac96

Secondary· 6.8%

#251d1c

Text· 6.8%

#521311

Accent· 6%

#9b7770

Secondary· 5.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)google-analytics.com(1)local(1)kookiecheck.cz(1)ntm.cz(1)

Website Identity

ntm.cz

27 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-QUANTCOMcs

Social Profiles

Facebook Instagram

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Last analyzed: 12 May 2026 at 05:44

Historical Analysis & Change Tracking