vymeniky.cz

https://vymeniky.cz· First analyzed 20 May 2026· Updated 20 May 2026

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vymeniky.cz

Mobile

Sponsored

Hosting Provider

Websupport s.r.o.

IP Address

37.9.175.163

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇸🇰 Bratislava, Slovakia

ASN

AS51013

Organization

Websupport s.r.o.

Server

OpenResty

Nameservers

ns3.websupport.eu.ns1.websupport.cz.ns2.websupport.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

161 KB

21 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Websupport s.r.o.

Technology Stack

6 Technologies Detected

Libraries

UI Components

Analytics

Web Servers

SEO Analysis

D48/100

Meta Tags8/15

Content10/12

Headings0/8

Technical14/25

E-E-A-T0/7

Images1/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

vymeniky.czvymeniky.cz

Výměníky.cz - Výměník tepla, tepelné deskové pájené i rozebíratelné...

Jsme specialisté na výměníky tepla. Ohřev užitkové vody a bazénů, výměníkové stanice, výparníky a kondenzátory pro chlazení. Nabízíme výměníky deskové i trub...

Title truncated. Description truncated.

Title Length76 chars

Recommended: 50-60 chars (~466px / 580px)

Description Length198 chars

Recommended: 120-160 chars

Issues (3)

• Title is too long (76 chars, ~466px). Will be truncated in search results.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (2/2) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

86 URLs

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

2/100

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

F29/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

7/25

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

Text ratio:22%

Words:244

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary71w

Descriptive Headings

Canonical URL

Open Graph0/3

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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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.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

3/20

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

1/15

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.

69/100

A+

16 mg

CO₂e / view

161.3 KB

Page Weight

95%

Cleaner Than

New Visitor

19 mg

Returning (cached)

9 mg

Annual (10K/mo)

2.0 kg

Emission Segments

Data Center

<0.001 g

Network

5 mg

Device

11 mg

Resource Breakdown

JavaScript

93.9 KB

Images

3.1 KB

CSS

61.7 KB

HTML

2.6 KB

Green Hosting Verified

Websupport.sk

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

37d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

28.03.2026

Valid Until

26.06.2026

Subject Alternative Names (2)

*.vymeniky.czvymeniky.cz

SHA-256 Fingerprint

6F:81:37:29:2E:7F:C4:C0:1B:E7:C1:1A:5A:B0:75:F7:CA:82:1F:67...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

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

content-encoding

⚡ Brotli(br)

content-security-policy

upgrade-insecure-requests

content-type

text/html; charset=UTF-8

date

Wed, 20 May 2026 03:09:52 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx10.websupport.cz

mx20.websupport.cz

Domain Information

vymeniky.cz

Domain Age

26y 1m

Created

17.04.2000

Expires

16.04.2027

Last Updated

16.03.2026

Registrar

REG-WEBSUPPORT

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.

49/100

Not 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, initial-scale=1.0

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Tahoma

WCAG Partial

51/100

Readability

/30

15/30

12px · LH 1.60

Hierarchy

/20

6/20

WCAG

/25

16/25

3.83:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Tahoma

Body Font

Tahoma

Sans12px

Contrast Ratio

3.83:1

1 issue

Reading Comfort

~95 CPL

Wide lines

12px

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

⚠️ Wide lines: ~95 chars/line. Use max-width: 65ch for comfortable reading.

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

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.8:1).

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Buy on MyFontsFlesch 40

Color Palette

7 unique colors

2.07:1 Fail Light

#ffffff

Background· 71.89999999999999%

#b5b4b6

Other· 3.8%

#528aad

Primary· 6.9%

#6babd4

Accent· 6.1%

#cad7df

Secondary· 4.2%

#4a5470

Secondary· 3.7%

#92aebf

Secondary· 3.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)ssl.google-analytics.com(1)

Website Identity

vymeniky.cz

info@vymeniky.cz

26 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-WEBSUPPORT

Sponsored

Last analyzed: 20 May 2026 at 03:10

Historical Analysis & Change Tracking