restena.lu

https://restena.lu· First analyzed 16 May 2026· Updated 16 May 2026

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restena.lu

Mobile

Sponsored

Hosting Provider

Fondation RESTENA

IP Address

158.64.1.83

Site Location

🇱🇺 Luxembourgvia tld

Server Location

🇱🇺 Strassen, Luxembourg

ASN

AS2602

Organization

Fondation RESTENA

Server

Nginx

Nameservers

ns1.restena.lu.ns2.restena.lu.ns3.restena.lu.nse.restena.lu.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

1.6 s10%

Speed Index

2.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

17.9 MB

93 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

5 Technologies Detected

CSS Frameworks

Libraries

UI Components

Web Servers

SEO Analysis

D59/100

Meta Tags4/15

Content12/12

Headings8/8

Technical17/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

restena.lurestena.lu

Home page | RESTENA

No description available for this page.

Title Length19 chars

Recommended: 50-60 chars (~118px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Most images missing alt text (12/15) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

41 rules

Local SEO

Local Search Readiness

12/100

Poor

4 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

D44/100

Bot Access

20/25

Machine Read.

12/25

Schema Data

0/25

Citation

12/25

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

navheader/footer

Text ratio:11%

Words:907

Token eff.:Optimal

Sections/1K:26.5

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary38w

Descriptive Headingsavg 3.8w

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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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.

86/100

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

15/15

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

9/15

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

ARIA & Roles

10/15

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.

20/100

2.27 g

CO₂e / view

17.9 MB

Page Weight

Cleaner Than

New Visitor

2.59 g

Returning (cached)

1.30 g

Annual (10K/mo)

272.1 kg

Emission Segments

Data Center

506 mg

Network

544 mg

Device

1.22 g

Resource Breakdown

JavaScript

107.5 KB

Images

17.6 MB

CSS

187.7 KB

HTML

11.3 KB

Green Hosting Not Verified

Fondation RESTENA

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

76%Good

Interactive

HTTPS

No WAF

286d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.02.2026

Valid Until

26.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.restena.lurestena.lu

SHA-256 Fingerprint

BF:3C:0A:92:D9:5B:A0:99:19:90:E3:85:A6:CF:D8:70:73:D9:C3:4B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy

default-src 'self'; style-src 'self' 'unsafe-inline'; report...

content-type

text/html; charset=UTF-8

date

Sat, 16 May 2026 00:00:55 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

smtpgate3.restena.lu

smtpgate2.restena.lu

smtpgate1.restena.lu

Domain Information

restena.lu

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.

56/100

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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Ubuntu

WCAG Partial

70/100

Readability

/30

21/30

16px · LH 1.90

Hierarchy

/20

18/20

3.75x ratio · ✓ H1→H6

WCAG

/25

18/25

2.62:1 min contrast

Performance

/25

13/25

1 font · 4 req

Heading Font

Ubuntu

Sans60px

Body Font

Ubuntu

Sans16px

Contrast Ratio

2.62:1

7 issues

Reading Comfort

~93 CPL

Wide lines

60px

42px

25px

20px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Wide line spacing (1.90). 1.4–1.6 is optimal for body text.

⚠️ Wide lines: ~93 chars/line. Use max-width: 65ch for comfortable reading.

❌ Very complex text: Flesch score 23/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 2.6:1).

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

Buy on MyFontsFluid Type (rem)Flesch 23

Color Palette

8 unique colors

Light

#ffffff

Background· 85.69999999999997%

#fef5e3

Primary· 4.8%

#5b7c7f

Secondary· 2.3%

#ab5e42

Secondary· 1.5%

#eec980

Accent· 1.2%

#dd8e70

Accent· 1.2%

#e9e7e1

Secondary· 1.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(20)

Website Identity

restena.lu

Location detected: 🇱🇺 Luxembourgvia tld

Social Profiles

Facebook LinkedIn

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Last analyzed: 16 May 2026 at 00:01

Historical Analysis & Change Tracking