ulb.be

https://ulb.be· First analyzed 23 Apr 2026· Updated 23 Apr 2026

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ulb.be

Mobile

Sponsored

Hosting Provider

Resulb

IP Address

164.15.242.30

Site Location

🇧🇪 Belgiumvia tld

Server Location

🇧🇪 Brussels, Belgium

ASN

AS2611

Organization

Resulb

Server

Apache

Nameservers

ns1.ulb.be.ns1.ulb.ac.be.ns2.ulb.ac.be.ns2.ulb.be.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

428 ms10%

Speed Index

556 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

8.2 MB

49 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Resulb

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Matomo

Web Servers

Apachev2.4.65

SEO Analysis

B75/100

Meta Tags14/15

Content10/12

Headings6/8

Technical24/25

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

ulb.beulb.be

ULB - UNIVERSITÉ LIBRE DE BRUXELLES - ULB

L'ULB vous accueille lors de ses différentes activités d'information sur les études et la vie étudiante, sur ses campus et près de chez vous!

Title Length41 chars

Recommended: 50-60 chars (~247px / 580px)

Description Length141 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (15/28) — critical for accessibility and SEO

9 issues found

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Crawlability

Sitemap

Type: standard

4,106 URLs

robots.txt

8 rules

Sitemap reference found

Local SEO

Local Search Readiness

8/100

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

D45/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

3/25

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:4%

Words:2,367

Token eff.:Optimal

Sections/1K:0.4

Depth:1/5

Structured Data

Microdata

WebSitemicrodataBreadcrumbListmicrodataSearchActionmicrodata

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 1w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

73/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

18/20

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

Forms & Inputs

15/15

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

5/15

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.

16/100

1.04 g

CO₂e / view

8.2 MB

Page Weight

Cleaner Than

New Visitor

1.18 g

Returning (cached)

592 mg

Annual (10K/mo)

124.3 kg

Emission Segments

Data Center

231 mg

Network

249 mg

Device

556 mg

Resource Breakdown

JavaScript

320.5 KB

Images

146.1 KB

CSS

7.7 MB

HTML

26.8 KB

Other

3.3 KB

Green Hosting Not Verified

Resulb

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

217d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

26.11.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.ulb.becwtest.ulb.bebib.ulb.besoutenir.ulb.beformationcontinue.ulb.beeducation.ulb.beinforemploi.ulb.betestsite.ulb.be+12 more

SHA-256 Fingerprint

40:3C:BC:C5:D6:02:D4:0A:18:E0:C6:B4:B7:EB:B5:DE:B3:AF:53:00...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-language

en-GB

content-type

text/html;charset=UTF-8

date

Thu, 23 Apr 2026 05:25:11 GMT

server

Apache/2.4.65 (Debian)

strict-transport-security

max-age=31536000; includeSubDomains; preload;

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

ulb-be.mail.protection.outlook.com

Domain Information

ulb.be

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

62/100

Mobile Friendly3 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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

opensans

WCAG Partial

59/100

Readability

/30

17/30

14px · LH 1.38

Hierarchy

/20

14/20

1.14x ratio · ✓ H1→H6

WCAG

/25

17/25

2.85:1 min contrast

Performance

/25

11/25

2 fonts · 7 req

Heading Font

opensans

Sans16px

Body Font

opensans

Sans14px

Contrast Ratio

2.85:1

6 issues

Reading Comfort

~41 CPL

Narrow lines

16px

32px

18px

14px

Major Third

Scale

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

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 2.9:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFlesch 36

Color Palette

10 unique colors

Light

#ffffff

Background· 43.199999999999996%

#0066a7

Primary· 11%

#e6e9ec

Text· 9%

#2a2c33

Secondary· 7.8%

#cdb8a4

Secondary· 5.5%

#9daeba

Secondary· 5.5%

#667e8e

Secondary· 5.2%

#863e35

Secondary· 4.9%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

ulb.be(2)matomo.ulb.be(1)

Website Identity

ulb.be

Location detected: 🇧🇪 Belgiumvia tld

📧 Microsoft 365fr

Sponsored

Last analyzed: 23 Apr 2026 at 05:25

Historical Analysis & Change Tracking