libis.be

https://libis.be· First analyzed 14 May 2026· Updated 14 May 2026

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libis.be

Mobile

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Hosting Provider

Katholieke Universiteit Leuven

IP Address

134.58.65.99

Site Location

🇧🇪 Belgiumvia tld

Server Location

🇧🇪 Leuven, Belgium

ASN

AS2611

Organization

Katholieke Universiteit Leuven

Server

Apache

Nameservers

dns1.kulnet.kuleuven.be.dns2.kulnet.kuleuven.be.

Performance

Core Web Vitals

Weight

First Contentful Paint

901 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6.7 MB

39 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Katholieke Universiteit Leuven

Technology Stack

8 Technologies Detected

CSS Frameworks

Bootstrap

Tailwind CSS

Icon Libraries

Font Awesome Material Icons

Libraries

UI Components

Fonts

Web Servers

SEO Analysis

D46/100

Meta Tags4/15

Content12/12

Headings3/8

Technical10/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

libis.belibis.be

Home · LIBIS (NL) · Libis

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars (~149px / 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 (14/16) — critical for accessibility and SEO

13 issues found

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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.

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AI & LLM Readiness

D40/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

9/25

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:12%

Words:805

Token eff.:Optimal

Sections/1K:7.5

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary61w

Descriptive Headingsavg 2.2w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

52/100

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

10/15

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

Color & Contrast

12/15

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

Keyboard & Focus

9/15

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.

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.

15/100

851 mg

CO₂e / view

6.7 MB

Page Weight

Cleaner Than

New Visitor

972 mg

Returning (cached)

486 mg

Annual (10K/mo)

102.1 kg

Emission Segments

Data Center

190 mg

Network

204 mg

Device

457 mg

Resource Breakdown

JavaScript

195.6 KB

Images

6.3 MB

CSS

176.9 KB

Fonts

1.8 KB

HTML

9.9 KB

Green Hosting Not Verified

Katholieke Universiteit Leuven

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

163d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

08.04.2026

Valid Until

24.10.2026

Subject Alternative Names (3)

libis.belamptest.libis.bewww.libis.be

SHA-256 Fingerprint

B1:AC:25:07:34:FD:8D:AE:C0:55:E3:BA:07:0C:26:77:EA:46:3E:41...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

9811

content-type

text/html; charset=UTF-8

cteonnt-length

47755

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (6)

cavin01.kuleuven.be

cavin02.kuleuven.be

limbak.cc.kuleuven.be

cavin.kuleuven.be

+2 more

Domain Information

libis.be

DNSSEC

Not Enabled

Privacy & Compliance

CookieConsent.js

Cookie Consent Banner

CookieConsent.js

GDPR Indicators

Cookie consent banner detected

CMP: CookieConsent.js

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.

70/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Source Serif Pro + Source Sans Pro

WCAG AAA

69/100

Readability

/30

20/30

18px · LH 1.63

Hierarchy

/20

6/20

WCAG

/25

23/25

10.67:1 min contrast

Performance

/25

20/25

2 fonts · 1 req

Heading Font

Source Serif Pro

Serif

Body Font

Source Sans Pro

Sans18px

Contrast Ratio

10.67:1

WCAG AAA (≥7:1)

Reading Comfort

~40 CPL

Narrow lines

25px

18px

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

❌ Very complex text: Flesch score 4/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 10.7:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

✅ Lean font stack: 2 font families keeps load times fast.

GGoogle Fonts Buy on MyFontsFlesch 4

Color Palette

12 unique colors

18.83:1 AAA Light

#ffffff

Background· 21.3%

#10120f

Secondary· 13.4%

#013268

Primary· 7.2%

#5e6f73

Secondary· 6.3%

#6b8390

Secondary· 6.2%

#0f192c

Secondary· 5.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdn.jsdelivr.net(2)ajax.googleapis.com(1)kit.fontawesome.com(1)unpkg.com(1)

Website Identity

libis.be

Location detected: 🇧🇪 Belgiumvia tld

nl-NL

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Last analyzed: 14 May 2026 at 09:44

Historical Analysis & Change Tracking