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ulb.be

https://ulb.be· First analyzed 23 Apr 2026· Updated 23 Apr 2026
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ulb.be
Desktop screenshot of ulb.be
Mobile screenshot of ulb.be
Mobile

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Hosting Provider

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

1

Analytics

1

Web Servers

1

SEO Analysis

B75/100
21
8
1
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
U
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

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.

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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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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.
B
73/100
13
Passed
3
Critical
1
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...

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
F
1.04 g
CO₂e / view
8.2 MB
Page Weight
5%
Cleaner Than
New Visitor
1.18 g
vs
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...
F

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

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

98

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
Privacy Policy
Terms of Service

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.
C
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...

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
h1
32px
h2
18px
h3
14px
p
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.

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

2

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

6 Resources

3
Scripts
3
Styles
1
Async
1
Defer

Top Script Sources

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

Website Identity

ulb.be

Location detected: 🇧🇪 Belgiumvia tld
📧 Microsoft 365fr

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Last analyzed: 23 Apr 2026 at 05:25

Historical Analysis & Change Tracking