numdam.org

https://numdam.org· First analyzed 02 May 2026· Updated 02 May 2026

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numdam.org

Mobile

Sponsored

Hosting Provider

MI2S

IP Address

129.88.220.36

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Grenoble, France

ASN

AS1942

Organization

MI2S

Server

Apache

Nameservers

dns2.math.cnrs.fr.dns1.math.cnrs.fr.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

899 KB

55 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

MI2S

Technology Stack

7 Technologies Detected

CSS Frameworks

Libraries

UI Components

Icon Libraries

Fonts

Web Servers

SEO Analysis

D46/100

Meta Tags4/15

Content9/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

numdam.orgnumdam.org

Numdam

No description available for this page.

Title Length6 chars

Recommended: 50-60 chars (~42px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (24/26) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

5 rules

Local SEO

Local Search Readiness

6/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

D41/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

11/25

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

nav

Text ratio:6%

Words:304

Token eff.:Optimal

Sections/1K:3.3

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary78w

Descriptive Headingsavg 6w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

44/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

7/15

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.

5 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.

37/100

111 mg

CO₂e / view

898.6 KB

Page Weight

80%

Cleaner Than

New Visitor

127 mg

Returning (cached)

64 mg

Annual (10K/mo)

13.3 kg

Emission Segments

Data Center

25 mg

Network

27 mg

Device

60 mg

Resource Breakdown

JavaScript

349.1 KB

Images

404.7 KB

CSS

138.7 KB

Fonts

924 B

HTML

5.3 KB

Green Hosting Not Verified

MI2S

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

49%Poor

Interactive

HTTPS

No WAF

44d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

17.03.2026

Valid Until

15.06.2026

Subject Alternative Names (2)

numdam.orgwww.numdam.org

SHA-256 Fingerprint

45:2D:68:85:F4:A2:78:A0:8F:E6:38:49:D5:C1:F2:21:DB:4E:5C:78...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=utf-8

cross-origin-opener-policy

same-origin

date

Sat, 02 May 2026 16:06:17 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mx1.math.cnrs.fr

mx2.math.cnrs.fr

Domain Information

numdam.org

Domain Age

23y 5m

Created

28.11.2002

Expires

28.11.2026

Last Updated

10.09.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

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.

68/100

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...

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Typography & Readability

Helvetica Neue

WCAG Partial

62/100

Readability

/30

20/30

14px · LH 1.50

Hierarchy

/20

6/20

WCAG

/25

15/25

3.61:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Helvetica Neue

Sans

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

3.61:1

2 issues

Reading Comfort

~41 CPL

Narrow lines

32px

24px

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).

❌ Very complex text: Flesch score 13/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.6:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

GGoogle FontsFlesch 13

Color Palette

8 unique colors

4.52:1 AA Light

#ffffff

Background· 47.4%

#6e787e

Other· 3.5%

#fef1c4

Accent· 25.4%

#5eb8cc

Primary· 9.3%

#c2a894

Secondary· 5.6%

#b2c5c4

Secondary· 5.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)cdn.jsdelivr.net(7)

Website Identity

numdam.org

23 years old

Location detected: 🇫🇷 Francevia ip

Gandi SASfr

Sponsored

Last analyzed: 02 May 2026 at 16:06

Historical Analysis & Change Tracking