operaplus.cz

https://operaplus.cz· First analyzed 28 May 2026· Updated 28 May 2026

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operaplus.cz

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.71.189

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sue.ns.cloudflare.com.stan.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

637 ms10%

Speed Index

828 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

371 KB

250 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv7.0

cms

Foxizv2.6.5Custom

by Theme-Ruby

View Theme

Technology Stack

23 Technologies Detected

Plugins

Foxiz Core

Contact Form 7

Op Autori Abc The Events Calendar Easy Fancybox

Elementor

Advanced Ads Advanced Ads Pro

Analytics

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

Fonts

CDN

SEO Analysis

A85/100

Meta Tags12/15

Content10/12

Headings3/8

Technical24/25

E-E-A-T7/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness4/4

Mobile3/4

Indexability3/3

operaplus.czoperaplus.cz

Nejnavštěvovanější web o klasické hudbě v České republice - Opera PLUS

Festival Janáček Brno poprvé zavítá do Bruselu a Paříže, kde v podání Zemlinsky Quartetu představí českou komorní hudbu i odkaz…

Title Length70 chars

Recommended: 50-60 chars (~430px / 580px)

Description Length128 chars

Recommended: 120-160 chars

Issues (1)

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

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

152 URLs

152 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

12/100

Poor

3 14

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

Sponsored

AI & LLM Readiness

C63/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

13/25

Citation

20/25

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

blockquotesnav

Text ratio:3%

Words:893

Token eff.:Optimal

Sections/1K:3.4

Depth:2/5

Structured Data

9 JSON-LD

Article×1.2Person×1.3Organization×1.1WebSiteSearchAction

sameAs entity links

Citation Readiness

Opening Summary1451w

Descriptive Headingsavg 10.8w

Canonical URL

Open Graph2/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

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.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

11/20

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

Forms & Inputs

5/15

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

8/15

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

ARIA & Roles

7/15

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.

84/100

A+

37 mg

CO₂e / view

370.7 KB

Page Weight

90%

Cleaner Than

New Visitor

43 mg

Returning (cached)

21 mg

Annual (10K/mo)

4.5 kg

Emission Segments

Data Center

2 mg

Network

11 mg

Device

25 mg

Resource Breakdown

JavaScript

44.8 KB

Images

129.0 KB

CSS

129.5 KB

Fonts

26.6 KB

HTML

40.7 KB

Green Hosting Verified

Cloudflare

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

WAF

62d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

30.04.2026

Valid Until

29.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

operaplus.cz*.operaplus.cz

SHA-256 Fingerprint

79:E4:39:6F:47:BE:C8:0E:69:BC:6E:17:DB:92:9A:14:04:42:57:C7...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

a029a1b83ac90286-CDG

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Thu, 28 May 2026 01:54:31 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

63e966bed0df3d99.mx2.emailprofi.seznam.cz

63e966bed0df3d99.mx1.emailprofi.seznam.cz

Domain Information

operaplus.cz

Domain Age

16y 11m

Created

09.06.2009

Expires

08.06.2028

Last Updated

02.08.2018

Registrar

REG-WEDOS

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.

81/100

Mobile Friendly7 breakpoints

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Marcellus + Segoe UI

WCAG Partial

60/100

Readability

/30

18/30

14px · LH 1.70

Hierarchy

/20

8/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

18/25

System fonts

Heading Font

Marcellus

Sans

Body Font

Segoe UI

Sans14px

Contrast Ratio

1:1

7 issues

Reading Comfort

Dual Sans-Serif

left aligned

30px

22px

16px

14px

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

❌ Very complex text: Flesch score 10/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

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

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

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

GGoogle Fonts Buy on MyFontsFlesch 10

Color Palette

11 unique colors

5.5:1 AA Light

#ffffff

Background· 45.900000000000006%

#6e6675

Other· 3.9%

#1e388d

Accent· 11.4%

#090406

Primary· 8.9%

#1f5da5

Accent· 6.2%

#639ec6

Secondary· 4.7%

#c4ac9c

Secondary· 4%

#4e2a2b

Secondary· 3.8%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

operaplus.cz(17)connect.facebook.net(2)googletagmanager.com(1)

Website Identity

Opera PLUS

Organization

Festival Janáček Brno poprvé zavítá do Bruselu a Paříže, kde v podání Zemlinsky Quartetu představí českou komorní hudbu i odkaz…

16 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-WEDOScs

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 28 May 2026 at 01:54

Historical Analysis & Change Tracking