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tennis.nl

https://tennis.nl· First analyzed 22 May 2026· Updated 22 May 2026
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tennis.nl
Desktop screenshot of tennis.nl
Mobile screenshot of tennis.nl
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

52.59.72.50

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS EC2 (eu-central-1)

Server

Nginx

Nameservers

ns-394.awsdns-49.com.ns-614.awsdns-12.net.ns-1032.awsdns-01.org.ns-1995.awsdns-57.co.uk.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.4 MB
82 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
Umbraco
Infrastructure
Hosting
Amazon Web Services (AWS)

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

10 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft Clarity

CSS Frameworks

2
Bootstrap
Tailwind CSS

UI Components

1
Fancybox

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Web Servers

1
Nginx

SEO Analysis

B71/100
22
8
0
Meta Tags5/15
Content12/12
Headings6/8
Technical22/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social2/5
Freshness2/4
Mobile2/4
Indexability3/3
T
tennis.nltennis.nl

Tennis.nl | Tennis

Tennis.nl is hét platform voor de Nederlandse tennisspeler!

Title Length18 chars

Recommended: 50-60 chars (~100px / 580px)

Description Length59 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    2,338 URLs

    robots.txt

    6 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    15/100
    Poor
    4 13

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D49/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    3/25
    Citation
    15/25

    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:498
    Token eff.:Optimal
    Sections/1K:68.3
    Depth:2/5

    Structured Data

    1 JSON-LD
    Organization×1.1
    sameAs entity links

    Citation Readiness

    Opening Summary13w
    Descriptive Headingsavg 3.6w
    Canonical URL
    Open Graph2/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    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.
    C
    68/100
    10
    Passed
    4
    Critical
    3
    Warnings
    Images & Alt Text
    15/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    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
    15/15
    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
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    4 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.
    28/100
    F
    457 mg
    CO₂e / view
    4.4 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    522 mg
    vs
    Returning (cached)
    261 mg
    Annual (10K/mo)
    54.8 kg
    Emission Segments
    Data Center
    22 mg
    Network
    134 mg
    Device
    300 mg
    Resource Breakdown
    JavaScript
    513.1 KB
    Images
    2.5 MB
    CSS
    1.3 MB
    Fonts
    107.8 KB
    HTML
    15.7 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    123d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    09.09.2025

    Valid Until

    22.09.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (16)

    knltb.nl*.app.knltb.nl*.centrecourt.nl*.id.knltb.nl*.knltb.nl*.leraren.centrecourt.nl*.lidworden.knltb.nl*.nlpadel.nl+8 more

    SHA-256 Fingerprint

    A5:26:12:41:2F:26:1F:31:BB:A2:EE:F6:CA:8A:70:24:E8:20:94:67...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    api-supported-versions
    1.0
    content-encoding
    ⚡ Brotli(br)
    content-security-policy
    default-src 'self'; script-src 'self' *.googletagmanager.com...
    content-type
    text/html; charset=utf-8
    date
    Fri, 22 May 2026 12:18:27 GMT
    referrer-policy
    no-referrer-when-downgrade
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    70

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (2)

    mx.backup.mailprotect.be
    mx.mailprotect.be

    Domain Information

    tennis.nl

    Domain Age
    27 years

    Created

    20.05.1999

    Last Updated

    24.02.2026

    Registrar

    Registrar.eu

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    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.
    B
    74/100
    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, minimum-scale=1.0, initial-scale=1, shrink-to-fit=no
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    MarselisOT + Roboto

    WCAG Partial
    72/100
    Readability
    /30
    18/30

    16px · LH 1.75

    Hierarchy
    /20
    18/20

    3x ratio

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    20/25

    System fonts

    Heading Font

    MarselisOT

    Sans48px

    Body Font

    Roboto

    Sans16px

    Contrast Ratio

    1:1

    35 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    48px
    h1
    34px
    h2
    34px
    h3
    16px
    p

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

    ❌ Very complex text: Flesch score 16/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 35 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 3.0x larger than body text.

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    Buy on MyFontsFlesch 16

    Color Palette

    14 unique colors
    14.59:1 AAA Light
    #ffffff
    Text· 11.9%
    #2b282a
    Text· 9%
    #ff5000
    Primary· 0%
    #fc7006
    Accent· 13.4%
    #e8dac9
    Secondary· 7.8%
    #575a46
    Secondary· 7.5%
    #7f7553
    Secondary· 7.3%
    #c8b991
    Secondary· 6.8%

    Business & Marketing Stack

    6 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    Advertising

    2
    Google AdsEnterprise
    Facebook PixelMid-Market

    Ad platforms and retargeting pixels

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    3

    Categories

    6

    Total Tools

    1

    Enterprise

    2

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    17 Resources

    16
    Scripts
    1
    Styles
    11
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(4)connect.facebook.net(2)consent.cookiebot.com(2)googleads.g.doubleclick.net(2)scripts.clarity.ms(1)

    Website Identity

    KNLTB

    KNLTB

    Organization
    www.knltb.nl
    27 years old
    Location detected: 🇳🇱 Netherlandsvia tld
    Registrar.eunl

    Sponsored

    Last analyzed: 22 May 2026 at 12:18

    Historical Analysis & Change Tracking