cerncourier.com

https://cerncourier.com· First analyzed 01 May 2026· Updated 01 May 2026

Export

cerncourier.com

Mobile

Sponsored

Hosting Provider

CERN-LAN1

IP Address

137.138.226.190

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Geneva, Switzerland

ASN

AS513

Organization

CERN-LAN1

Server

Apache

Nameservers

ext-dns-2.cern.ch.ext-dns-1.cern.ch.

Performance

Core Web Vitals

Weight

First Contentful Paint

691 ms10%

Speed Index

898 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.9 MB

75 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

PhysicsWorldv1.0.0Custom

by 93digital

View Theme

Technology Stack

15 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Matomo Segment

Plugins

Matomo Ads Manager Complianz Gdpr

Libraries

UI Components

CSS Frameworks

Icon Libraries

Fonts

Adobe Fonts (Typekit)

Tag Managers

Google Tag Manager

Web Servers

Apachev2.4.62

SEO Analysis

B77/100

Meta Tags13/15

Content10/12

Headings3/8

Technical24/25

E-E-A-T0/7

Images4/7

Links4/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

cerncourier.comcerncourier.com

CERN Courier - reporting on international high-energy physics

News and opinion from the world of particle physics: experiments, theory, accelerators, computing and beyond.

Title Length61 chars

Recommended: 50-60 chars (~362px / 580px)

Description Length109 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

23 URLs

23 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

14/100

Poor

5 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

D47/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

4/25

Citation

14/25

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:5%

Words:1,345

Token eff.:Optimal

Sections/1K:1.5

Structured Data

4 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary424w

Descriptive Headingsavg 4.6w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

70/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

3/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

14/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

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

ARIA & Roles

11/15

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

3 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.

9/100

372 mg

CO₂e / view

2.9 MB

Page Weight

30%

Cleaner Than

New Visitor

425 mg

Returning (cached)

213 mg

Annual (10K/mo)

44.7 kg

Emission Segments

Data Center

83 mg

Network

89 mg

Device

200 mg

Resource Breakdown

JavaScript

492.3 KB

Images

2.1 MB

CSS

203.7 KB

HTML

144.2 KB

Other

300 B

Green Hosting Not Verified

CERN-LAN1

9 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

69d

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/1.1

Valid From

11.04.2026

Valid Until

10.07.2026

Subject Alternative Names (1)

cerncourier.com

SHA-256 Fingerprint

4E:B2:F4:09:5D:DB:E3:9B:A1:86:0B:20:40:F2:35:57:FF:88:ED:11...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-type

text/html; charset=UTF-8

date

Fri, 01 May 2026 08:40:44 GMT

link

<https://cerncourier.com/>; rel=shortlink

server

Apache/2.4.62 (Red Hat Enterprise Linux) OpenSSL/3.2.2

transfer-encoding

chunked

set-cookie

450ebd75f546845f90a8b1e291be5fc0

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

cerncourier.com

Domain Age

27y 8m

Created

04.09.1998

Expires

03.09.2026

Last Updated

30.08.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

80/100

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

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

ff-meta-serif-web-pro

WCAG Partial

58/100

Readability

/30

20/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

13/25

2 fonts · 1 req

Heading Font

ff-meta-serif-web-pro

Serif

Body Font

ff-meta-serif-web-pro

Serif14px

Contrast Ratio

1:1

5 issues

Reading Comfort

~36 CPL

Narrow lines

24px

30px

20px

14px

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

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

⚠️ Partial contrast: 5 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: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

AAdobe Fonts Buy on MyFonts

Color Palette

9 unique colors

7.71:1 AAA Light

#ffffff

Background· 28.200000000000003%

#54534e

Other· 6.4%

#0054a5

Primary· 36.5%

#423933

Text· 6.5%

#958c7c

Secondary· 6.2%

#002b59

Accent· 4.4%

#4f728d

Secondary· 1.9%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Matomo (Piwik)Mid-Market

User behavior and product analytics

Privacy & Cookies

ComplianzSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cerncourier.com(7)googletagmanager.com(2)cern-courier-clone.web.cern.ch(1)google-analytics.com(1)use.typekit.net(1)

Website Identity

CERN Courier - reporting on international high-energy physics

News and opinion from the world of particle physics: experiments, theory, accelerators, computing and beyond.

cern.courier@cern.ch

cerncourier.com/

27 years old

Location detected: 🇨🇭 Switzerlandvia ip

CSC Corporate Domains, Inc.en-US

Social Profiles

Sponsored

Last analyzed: 01 May 2026 at 08:41

Historical Analysis & Change Tracking