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enviweb.cz

https://enviweb.cz· First analyzed 17 May 2026· Updated 17 May 2026
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enviweb.cz
Desktop screenshot of enviweb.cz
Mobile screenshot of enviweb.cz
Mobile

Sponsored

Hosting Provider

ZONER software, a.s.

IP Address

37.46.210.118

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Kuřim, Czechia

ASN

AS34222

Organization

ZONER software, a.s.

Server

Nginx

Nameservers

ns.forpsi.cz.ns.forpsi.it.ns.forpsi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
395 ms10%
Speed Index
514 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
845 KB
74 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
ZONER software, a.s.
CDN
Vercel Image

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginx

SEO Analysis

C67/100
21
7
1
Meta Tags9/15
Content9/12
Headings3/8
Technical15/25
E-E-A-T3/7
Images6/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
E
enviweb.czenviweb.cz

EnviWeb.cz

Nejvyhledávanější informační zdroj v oboru životního prostředí. CSR, klimatická změna, green deal, ekostyl, vzdělávání, profesní ekologie, odborné akce

Title Length10 chars

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

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

49 URLs

49 sub-sitemaps

robots.txt

6 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

D47/100
Bot Access
20/25
Machine Read.
15/25
Schema Data
0/25
Citation
12/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:2%
Words:903
Token eff.:Optimal
Sections/1K:26.6
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 6.2w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
B
78/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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
B
105 mg
CO₂e / view
845.2 KB
Page Weight
80%
Cleaner Than
New Visitor
119 mg
vs
Returning (cached)
60 mg
Annual (10K/mo)
12.5 kg
Emission Segments
Data Center
23 mg
Network
25 mg
Device
56 mg
Resource Breakdown
JavaScript
230.9 KB
Images
97.1 KB
CSS
118.7 KB
HTML
28.4 KB
Other
370.1 KB
Green Hosting Not Verified
ZONER software, a.s.
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Static / Informational

HTTPS

No WAF

32d

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

20.03.2026

Valid Until

18.06.2026

Subject Alternative Names (1)

www.enviweb.cz

SHA-256 Fingerprint

4D:9B:6C:C0:35:48:E0:D0:42:F1:64:FD:26:47:2C:D6:19:F8:03:B3...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
⚪ Custom(s-maxage=900, stale-while-revalidate)
content-encoding
📦 Gzip(gzip)
content-security-policy
frame-ancestors https://www.enviweb.cz https://data.enviweb....
content-type
text/html; charset=utf-8
date
Sun, 17 May 2026 03:39:00 GMT
etag
"379d7-AleaZTuGTCtKoUNI1hJJFt1NQpA"
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

602ba23658beab60.mx1.emailprofi.seznam.cz
602ba23658beab60.mx2.emailprofi.seznam.cz

Domain Information

enviweb.cz

Domain Age
25y 8m

Created

30.08.2000

Expires

29.08.2028

Last Updated

30.07.2019

Registrar

REG-INTERNET-CZ

DNSSEC
Not Enabled

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.
C
69/100
Mobile Friendly
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,minimum-scale=1,initial-scale=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto Condensed

WCAG Partial
66/100
Readability
/30
26/30

16px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
16/25

1:1 min contrast

Performance
/25
16/25

1 font · 8 req

Heading Font

Roboto Condensed

Sans

Body Font

Roboto Condensed

Sans16px

Contrast Ratio

1:1

20 issues

Reading Comfort

Single Font Family

left aligned
30px
h2
24px
h3
16px
p

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

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

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

⚠️ Partial contrast: 20 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: 1 font families keeps load times fast.

Buy on MyFontsFlesch 42

Color Palette

8 unique colors
19.68:1 AAA Light
#ffffff
Primary· 20.7%
#0b0b0b
Text· 12.7%
#2e2a25
Secondary· 12.9%
#45642d
Secondary· 12.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

15 Resources

14
Scripts
1
Styles
2
Async
11
Defer

Top Script Sources

local(12)ads.enviweb.cz(1)stat.kubasek.eu(1)

Website Identity

enviweb.cz

25 years old
Location detected: 🇨🇿 Czech Republicvia tld
REG-INTERNET-CZcs

Social Profiles

FacebookX (Twitter)

Sponsored

Last analyzed: 17 May 2026 at 03:39

Historical Analysis & Change Tracking