supraphonline.cz

https://supraphonline.cz· First analyzed 15 May 2026· Updated 15 May 2026

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supraphonline.cz

Mobile

Sponsored

Hosting Provider

Managed

IP Address

78.24.14.182

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS43541

Organization

Managed

Server

Nginx

Nameservers

ns1.globaldomainserver.net.ns2.globaldomainserver.net.ns3.globaldomainserver.net.ns4.globaldomainserver.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

829 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.2 MB

73 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Managed

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity

Icon Libraries

Font Awesome Material Icons

CSS Frameworks

Tailwind CSS

Fonts

Google Fonts

Tag Managers

Google Tag Manager

Advertising

Microsoft Advertising

Web Servers

Nginx

SEO Analysis

C63/100

Meta Tags7/15

Content9/12

Headings3/8

Technical20/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

supraphonline.czsupraphonline.cz

Supraphonline.cz

Online obchod s českou a zahraniční populární i vážnou hudbou a mluveným slovem (audioknihami) v digitální podobě (MP3) i ve formě fyzických nosičů na CD, LP...

Description truncated.

Title Length16 chars

Recommended: 50-60 chars (~92px / 580px)

Description Length379 chars

Recommended: 120-160 chars

Issues (1)

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

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

314 URLs

314 sub-sitemaps

robots.txt

9 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

2 14 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.

7/25

Schema Data

3/25

Citation

13/25

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:4%

Words:466

Token eff.:Optimal

Sections/1K:17.2

Structured Data

1 JSON-LD

WebSiteSearchAction

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 2.8w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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

7/20

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

9/15

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

ARIA & Roles

2/15

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

4 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.

31/100

150 mg

CO₂e / view

1.2 MB

Page Weight

70%

Cleaner Than

New Visitor

171 mg

Returning (cached)

86 mg

Annual (10K/mo)

18.0 kg

Emission Segments

Data Center

34 mg

Network

36 mg

Device

80 mg

Resource Breakdown

JavaScript

129.6 KB

Images

3.0 KB

CSS

1.0 MB

Fonts

2.5 KB

HTML

14.9 KB

Green Hosting Not Verified

Managed

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

89d

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/2

Valid From

14.05.2026

Valid Until

12.08.2026

Subject Alternative Names (2)

cdn.supraphonline.czwww.supraphonline.cz

SHA-256 Fingerprint

A5:CF:C8:4D:3A:E6:D1:9B:7C:33:91:74:A5:DB:7D:C8:3E:29:8A:0A...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 15 May 2026 05:08:07 GMT

server

nginx

vary

X-Requested-With

x-powered-by

Nette Framework

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mta.vshosting.cloud

mta.vshosting.eu

Domain Information

supraphonline.cz

Domain Age

15y 4m

Created

12.01.2011

Expires

11.01.2031

Last Updated

20.05.2025

Registrar

REG-MARKMONITOR

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.

53/100

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, maximum-scale=1, user-scalable=no

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Open Sans + Arial

WCAG Partial

61/100

Readability

/30

20/30

14px · LH 1.43

Hierarchy

/20

8/20

WCAG

/25

16/25

4.4:1 min contrast

Performance

/25

17/25

System fonts

Heading Font

Open Sans

Sans

Body Font

Arial

Sans14px

Contrast Ratio

4.4:1

10 issues

Reading Comfort

Dual Sans-Serif

left aligned

24px

14px

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

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 4.4:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle FontsFlesch 0

Color Palette

6 unique colors

3.72:1 AA Large Light

#d1d4d4

Other· 44.9%

#72656a

Other· 6.3%

#ffffff

Primary· 0%

#4e292d

Secondary· 5.2%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)track.adform.net(2)bat.bing.com(2)google-analytics.com(2)scripts.clarity.ms(1)

Website Identity

Supraphonline.cz

www.supraphonline.cz/

15 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-MARKMONITORcs

Social Profiles

Facebook X (Twitter)YouTube

Sponsored

Last analyzed: 15 May 2026 at 05:08

Historical Analysis & Change Tracking