42.fr

https://42.fr· First analyzed 08 May 2026· Updated 08 May 2026

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42.fr

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.20.33.152

Site Location

🇫🇷 Francevia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

martha.ns.cloudflare.com.aaron.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

200 ms10%

Speed Index

260 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

11 KB

46 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

CMS

WordPressv5.8.13

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

9 Technologies Detected

Plugins

Wordpress Miniature Earth

Yoast SEO

Libraries

jQueryv3.6.0

Other

AOS (Animate On Scroll)

CSS Frameworks

Icon Libraries

Fonts

CDN

Languages

SEO Analysis

A+92/100

Meta Tags15/15

Content12/12

Headings8/8

Technical25/25

E-E-A-T5/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile4/4

Indexability3/3

42.fr42.fr

42 | Learn to Code. Break the Codes. Tuition-free Training.

42 is a future-proof computer science training to educate the next generation of software engineers. 42 takes a project-based approach.

Title Length59 chars

Recommended: 50-60 chars (~348px / 580px)

Description Length135 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (21/23) — critical for accessibility and SEO

4 issues found

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Crawlability

Sitemap

Type: standard

84 URLs

robots.txt

9 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100

Needs Work

6 12

Sponsored

AI & LLM Readiness

D58/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

8/25

Citation

19/25

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

data-nosnippet

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:4%

Words:760

Token eff.:Optimal

Sections/1K:63.2

Depth:2/5

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary21w

Descriptive Headingsavg 1.6w

Canonical URL

Open Graph3/3

Twitter Card1/3

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.

83/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

17/20

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

Forms & Inputs

12/15

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

15/15

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

ARIA & Roles

4/15

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

1 recommendation

•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.

76/100

A+

1 mg

CO₂e / view

11.1 KB

Page Weight

95%

Cleaner Than

New Visitor

1 mg

Returning (cached)

<0.001 g

Annual (10K/mo)

132 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

11.1 KB

Green Hosting Verified

Cloudflare

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

93%Excellent

Static / Informational

HTTPS

WAF

18d

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

26.04.2026

Valid Until

26.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (6)

42.frintra-staging.42.fr*.intra-staging.42.fr*.42.frintra.42.fr*.intra.42.fr

SHA-256 Fingerprint

1D:5B:FC:E2:AE:E5:9C:D3:02:9D:6A:AD:8B:4E:E8:C4:88:C2:04:FF...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cf-cache-status

DYNAMIC

cf-ray🇮🇹 Milan

9f87bca76fa74c6f-MXP

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Fri, 08 May 2026 10:21:20 GMT

link

<https://42.fr/wp-json/>; rel="https://api.w.org/" <https://...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

42.fr

Domain Age

21y 11m

Created

26.05.2004

Expires

31.05.2026

Last Updated

02.10.2025

Registrar

GANDI

DNSSEC

Not Enabled

Privacy & Compliance

Axeptio

Cookie Consent Banner

Axeptio

GDPR Indicators

Cookie consent banner detected

CMP: Axeptio

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.

77/100

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=1.0

Typography & Readability

futura-pt

WCAG Partial

71/100

Readability

/30

22/30

18px · LH 1.50

Hierarchy

/20

18/20

3.06x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 1 req

Heading Font

futura-pt

Sans55px

Body Font

futura-pt

Sans18px

Contrast Ratio

1:1

24 issues

Reading Comfort

~37 CPL

Narrow lines

55px

35px

45px

16px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

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

⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

GGoogle Fonts Buy on MyFontsFlesch 47

Color Palette

7 unique colors

14.02:1 AAA Light

#ffffff

Background· 33.39999999999999%

#2c2c28

Other· 4%

#001521

Accent· 30.1%

#000103

Primary· 12.899999999999999%

#87a3ab

Secondary· 3.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

42.fr(11)static.axept.io(1)analytics.42paris.fr(1)

Website Identity

42

Organization

42 is a future-proof computer science training to educate the next generation of software engineers. 42 takes a project-based approach.

42.fr/

21 years old

Location detected: 🇫🇷 Francevia tld

GANDI📧 Google Workspaceen

Social Profiles

Facebook X (Twitter)Instagram Medium

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Last analyzed: 08 May 2026 at 10:22

Historical Analysis & Change Tracking