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trc-leiden.nl

https://trc-leiden.nl· First analyzed 28 May 2026· Updated 28 May 2026
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trc-leiden.nl
Desktop screenshot of trc-leiden.nl
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Mobile

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Hosting Provider

OVHcloud
ovhcloud.com

IP Address

57.129.90.15

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16276

Organization

OVH GmbH

Server

LiteSpeed

Nameservers

ns3.serverhostgroup.com.ns2.serverhostgroup.com.ns1.serverhostgroup.com.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
7.5 MB
56 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
Joomla!
Infrastructure
Hosting
OVHcloud

Technology Stack

10 Technologies Detected

UI Components

2
Owl CarouselLightbox

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

2
Font AwesomeIonicons

Libraries

1
jQuery

Payments

1
PayPal

Web Servers

1
LiteSpeed

Languages

1
PHPv7.1.33

SEO Analysis

D53/100
15
11
2
Meta Tags4/15
Content12/12
Headings3/8
Technical18/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
T
trc-leiden.nltrc-leiden.nl

Home

No description available for this page.

Title Length4 chars

Recommended: 50-60 chars (~27px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1

13 issues found

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Crawlability

Sitemap
robots.txt

2 rules

Local SEO

Local Search Readiness

12/100
Poor
4 12 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

D43/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
3/25
Citation
8/25

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
def. listsnavheader/footer
Text ratio:18%
Words:2,507
Token eff.:Optimal
Sections/1K:5.6
Depth:3/5

Structured Data

Microdata
Article×1.2microdata

Citation Readiness

Opening Summary10w
Descriptive Headingsavg 5.9w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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
74/100
10
Passed
4
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
2/15
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.
31/100
F
772 mg
CO₂e / view
7.5 MB
Page Weight
5%
Cleaner Than
New Visitor
882 mg
vs
Returning (cached)
441 mg
Annual (10K/mo)
92.6 kg
Emission Segments
Data Center
38 mg
Network
227 mg
Device
507 mg
Resource Breakdown
JavaScript
103.1 KB
Images
7.1 MB
CSS
293.4 KB
HTML
17.3 KB
Green Hosting Verified
OVHcloud
GWF Verified
6 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

84d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

22.05.2026

Valid Until

20.08.2026

Subject Alternative Names (4)

*.trc-leiden.nl*.trc-leiden.orgtrc-leiden.nltrc-leiden.org

SHA-256 Fingerprint

84:0D:FC:2F:AD:2C:2A:8F:44:06:3A:0E:FD:3D:96:05:08:5D:ED:07...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...
content-encoding
⚡ Brotli(br)
content-length
109
content-type
text/html; charset=UTF-8
date
Thu, 28 May 2026 14:39:21 GMT
server
LiteSpeed
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

MX Records (1)

trc-leiden.nl

Domain Information

trc-leiden.nl

Domain Age
16y 10m

Created

15.07.2009

Last Updated

17.04.2021

Registrar

Internet Service Europe B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
D
53/100
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, maximum-scale=1.0, user-scalable=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

PTRootUI + Optima

WCAG Partial
54/100
Readability
/30
19/30

14px · LH 1.39

Hierarchy
/20
8/20
WCAG
/25
16/25

1:1 min contrast

Performance
/25
11/25

2 fonts · 6 req

Heading Font

PTRootUI

Sans

Body Font

Optima

Sans14px

Contrast Ratio

1:1

3 issues

Reading Comfort

~42 CPL

Narrow lines
24px
h2
18px
h3
14px
p

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

⚠️ Tight line spacing (1.39). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 53

Color Palette

12 unique colors
Light
#ffffff
Background· 47.49999999999999%
#b80416
Accent· 10.1%
#9e7d5e
Secondary· 5.6%
#851c1d
Primary· 5.4%
#335e6b
Secondary· 5.4%
#c8916e
Secondary· 5.3%
#d8c7ad
Secondary· 4.3%
#af503e
Secondary· 4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

24 Resources

14
Scripts
10
Styles
0
Async
0
Defer

Top Script Sources

local(14)

Website Identity

trc-leiden.nl

office@trcleiden.org
16 years old
Location detected: 🇳🇱 Netherlandsvia tld
Internet Service Europe B.V.en-gb

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Last analyzed: 28 May 2026 at 14:39

Historical Analysis & Change Tracking