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hortusleiden.nl

https://hortusleiden.nl· First analyzed 15 May 2026· Updated 15 May 2026
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hortusleiden.nl
Desktop screenshot of hortusleiden.nl
Mobile screenshot of hortusleiden.nl
Mobile

Sponsored

Hosting Provider

Fundaments B.V

IP Address

91.210.127.59

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Enschede, The Netherlands

ASN

AS25459

Organization

Fundaments B.V

Nameservers

ns1.surfnet.nl.ns2.surfnet.nl.ns3.surfnet.nl.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
877 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
12 KB
43 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Fundaments B.V

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

SEO Analysis

B79/100
23
6
0
Meta Tags14/15
Content9/12
Headings8/8
Technical23/25
E-E-A-T3/7
Images6/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile1/4
Indexability3/3
H
hortusleiden.nlhortusleiden.nl

Hortus botanicus Leiden | Oudste botanische tuin van Nederland

Bezoek onze botanische tuin vol zeldzame en bijzondere planten. ✓ Unieke collecties uit de hele wereld ✓ In de binnenstad van Leiden. Bezoek onze tuinen.

Title Length62 chars

Recommended: 50-60 chars (~374px / 580px)

Description Length153 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    543 URLs

    robots.txt

    58 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    32/100
    Needs Work
    9 7 1

    Sponsored

    AI & LLM Readiness

    D45/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    1/25
    Citation
    13/25

    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:3%
    Words:326
    Token eff.:Optimal
    Sections/1K:30.7
    Depth:2/5

    Structured Data

    1 JSON-LD
    Product(min)

    Citation Readiness

    Opening Summary71w
    Descriptive Headingsavg 2.7w
    Canonical URL
    Open Graph2/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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.
    B
    77/100
    13
    Passed
    1
    Critical
    2
    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
    5/15
    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
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    61/100
    A+
    2 mg
    CO₂e / view
    12.2 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    2 mg
    vs
    Returning (cached)
    <0.001 g
    Annual (10K/mo)
    180 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    <0.001 g
    Device
    <0.001 g
    Resource Breakdown
    HTML
    12.2 KB
    Green Hosting Not Verified
    Fundaments B.V
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Interactive

    HTTPS

    No WAF

    85d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    Valid From

    11.05.2026

    Valid Until

    09.08.2026

    Subject Alternative Names (2)

    hortusleiden.nlwww.hortusleiden.nl

    SHA-256 Fingerprint

    84:2D:E6:23:7E:BF:6A:50:75:14:49:98:31:A8:19:3D:BA:B6:E4:30...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-length
    12156
    content-security-policy
    block-all-mixed-content; base-uri 'self'; default-src 'self'...
    content-type
    text/html; charset=utf-8
    date
    Fri, 15 May 2026 21:59:22 GMT
    permissions-policy
    geolocation=(self)
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    hortusleiden-nl.c-v1.mx.microsoft

    Domain Information

    hortusleiden.nl

    Domain Age
    25y 1m

    Created

    12.04.2001

    Last Updated

    19.12.2024

    Registrar

    team.blue nl 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.
    A
    81/100
    Mobile Friendly8 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, user-scalable=yes, minimum-scale=0, maximum-scale=2
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Arial

    WCAG Partial
    79/100
    Readability
    /30
    21/30

    24px · LH 1.25

    Hierarchy
    /20
    20/20

    2.67x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    22/25

    System fonts

    Heading Font

    Arial

    Sans64px

    Body Font

    Arial

    Sans24px

    Contrast Ratio

    1:1

    12 issues

    Reading Comfort

    Single Font Family

    left aligned
    64px
    h1
    44px
    h2
    24px
    h3
    28px
    h4
    24px
    p

    ✅ Excellent readability: 24px body text is ideal for all devices.

    ⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

    ❌ Very complex text: Flesch score 21/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 2.7x larger than body text.

    Flesch 21

    Color Palette

    12 unique colors
    4.88:1 AA Dark
    #35342e
    Other· 12.3%
    #a4a298
    Other· 7.5%
    #1f1c13
    Secondary· 18.5%
    #fcfdfb
    Primary· 7.8%
    #a8846d
    Secondary· 6.7%
    #544943
    Text· 6.6%
    #756159
    Secondary· 6.3%
    #c1ad96
    Secondary· 5.9%

    Business & Marketing Stack

    3 Tools Detected

    Growing

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    1

    Categories

    3

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    21 Resources

    14
    Scripts
    7
    Styles
    7
    Async
    5
    Defer

    Top Script Sources

    youtube.com(3)static.hortusleiden.nl(3)clarity.ms(2)googletagmanager.com(2)scripts.clarity.ms(1)

    Website Identity

    Google business profile

    Product
    hortus@hortus.leidenuniv.nl
    0715275144
    25 years old
    Location detected: 🇳🇱 Netherlandsvia tld
    team.blue nl B.V.nl

    Sponsored

    Last analyzed: 15 May 2026 at 21:59

    Historical Analysis & Change Tracking