StackOptic
Back to Search
ntvg.nl favicon

ntvg.nl

https://ntvg.nl· First analyzed 01 May 2026· Updated 01 May 2026
Export
ntvg.nl
Desktop screenshot of ntvg.nl
Mobile screenshot of ntvg.nl
Mobile

Sponsored

Hosting Provider

True B.V

IP Address

87.233.198.7

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS15703

Organization

True B.V

Nameservers

ns1.transip.nl.ns0.transip.net.ns2.transip.eu.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
659 ms10%
Speed Index
857 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.6 MB
130 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
True B.V

Technology Stack

7 Technologies Detected

Fonts

2
Adobe Fonts (Typekit)Adobe Fonts

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

C68/100
19
8
1
Meta Tags11/15
Content12/12
Headings3/8
Technical17/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social1/5
Freshness2/4
Mobile4/4
Indexability3/3
N
ntvg.nlntvg.nl

Nederlands Tijdschrift voor Geneeskunde

Recente ontwikkelingen in de medische wetenschap. Geduid en van commentaar voorzien door erkende vakgenoten.

Title Length39 chars

Recommended: 50-60 chars (~238px / 580px)

Description Length108 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

670 URLs

robots.txt

43 rules

Sitemap reference found

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.

Sponsored

AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
14/25

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:5%
Words:619
Token eff.:Optimal
Sections/1K:50.1
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary202w
Descriptive Headingsavg 4.5w
Canonical URL
Open Graph1/3
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.
B
71/100
11
Passed
3
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
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
25/100
F
576 mg
CO₂e / view
4.6 MB
Page Weight
15%
Cleaner Than
New Visitor
659 mg
vs
Returning (cached)
329 mg
Annual (10K/mo)
69.2 kg
Emission Segments
Data Center
129 mg
Network
138 mg
Device
309 mg
Resource Breakdown
JavaScript
92.3 KB
Images
3.7 MB
CSS
777.6 KB
HTML
14.1 KB
Other
795 B
Green Hosting Not Verified
True B.V
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

61%Fair
Interactive

HTTPS

No WAF

72d

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

HTTP Protocol

HTTP/2

Valid From

14.04.2026

Valid Until

13.07.2026

Subject Alternative Names (2)

ntvg.nlwww.ntvg.nl

SHA-256 Fingerprint

96:3B:23:48:85:00:35:0E:70:FE:F3:19:7E:65:66:87:2E:3F:40:6A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 60s(max-age=60, public)
content-encoding
📦 Gzip(gzip)
content-language
nl
content-type
text/html; charset=UTF-8
date
Fri, 01 May 2026 19:13:52 GMT
etag
W/"1777627280"
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

ntvg-nl.mail.protection.outlook.com

Domain Information

ntvg.nl

Domain Age
27y 9m

Created

13.07.1998

Last Updated

23.09.2021

Registrar

team.blue nl B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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
72/100
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

Typography & Readability

novel-pro + source-sans-pro

WCAG Partial
64/100
Readability
/30
22/30

19px · LH 1.58

Hierarchy
/20
8/20
WCAG
/25
19/25

3.89:1 min contrast

Performance
/25
15/25

2 fonts · 1 req

Heading Font

novel-pro

Sans

Body Font

source-sans-pro

Sans19px

Contrast Ratio

3.89:1

1 issue

Reading Comfort

~39 CPL

Narrow lines
32px
h2
25px
h3
19px
p

✅ Excellent readability: 19px body text is ideal for all devices.

✅ Optimal line spacing: 1.58 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 25/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.9:1).

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

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

AAdobe FontsBuy on MyFontsFlesch 25

Color Palette

7 unique colors
2.77:1 Fail Light
#ffffff
Background· 68.2%
#a298a5
Other· 4.6%
#6689b1
Primary· 7.3%
#404f75
Secondary· 5.8%
#a5c1d9
Secondary· 5.4%
#e7e4e1
Secondary· 4.8%
#d4d8dc
Secondary· 3.9%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

14 Resources

10
Scripts
4
Styles
4
Async
0
Defer

Top Script Sources

local(5)googletagmanager.com(2)google-analytics.com(1)use.typekit.net(1)avg.swis.nl(1)

Website Identity

ntvg.nl

27 years old
Location detected: 🇳🇱 Netherlandsvia tld
team.blue nl B.V.📧 Microsoft 365nl

Sponsored

Last analyzed: 01 May 2026 at 19:14

Historical Analysis & Change Tracking