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openarchieven.nl

https://openarchieven.nl· First analyzed 20 May 2026· Updated 20 May 2026
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openarchieven.nl
Desktop screenshot of openarchieven.nl
Mobile screenshot of openarchieven.nl
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

168.119.145.32

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

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

Performance

85

Core Web Vitals

Weight

First Contentful Paint
1.8 s10%
Speed Index
2.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
8 KB
10 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Hetzner

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Libraries

2
jQueryv1.11.3
jQuery UI

CSS Frameworks

2
Bootstrapv3.3.5
Tailwind CSS

Icon Libraries

1
Font Awesome

Web Servers

1
Apache

SEO Analysis

C66/100
21
5
1
Meta Tags7/15
Content9/12
Headings5/8
Technical22/25
E-E-A-T3/7
Images0/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
O
openarchieven.nlopenarchieven.nl

Open Archives - search the genealogical data of Dutch and Belgian a...

Search the genealogical data of Dutch and Belgian archives and societies.

Title truncated.
Title Length104 chars

Recommended: 50-60 chars (~628px / 580px)

Description Length73 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (104 chars, ~628px). Will be truncated in search results.

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

13 URLs

13 sub-sitemaps

robots.txt

27 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

23/100
Needs Work
6 12

Sponsored

AI & LLM Readiness

D51/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
5/25
Citation
16/25

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
data-nosnippet

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:11%
Words:459
Token eff.:Optimal
Sections/1K:17.4
Depth:1/5

Structured Data

1 JSON-LD
Organization×1.1microdataWebSiteSearchAction

Citation Readiness

Opening Summary10w
Descriptive Headingsavg 5w
Canonical URL
Open Graph3/3
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.
A
80/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
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
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
6/15
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.
68/100
A+
<0.001 g
CO₂e / view
8.2 KB
Page Weight
95%
Cleaner Than
New Visitor
<0.001 g
vs
Returning (cached)
<0.001 g
Annual (10K/mo)
96 g
Emission Segments
Data Center
<0.001 g
Network
<0.001 g
Device
<0.001 g
Resource Breakdown
Images
1.8 KB
CSS
740 B
HTML
5.7 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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C

Security Score

61%Fair
Interactive

HTTPS

No WAF

58d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

18.04.2026

Valid Until

17.07.2026

Subject Alternative Names (2)

*.openarchieven.nlopenarchieven.nl

SHA-256 Fingerprint

71:ED:BB:C5:14:B4:96:F0:08:CC:62:35:5B:3C:30:00:2C:F1:1A:9B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin
*
cache-control
⚪ Custom(immutable)
content-encoding
⚡ Brotli(br)
content-length
5515
content-type
text/html; charset=utf-8
date
Wed, 20 May 2026 02:02:40 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

smtp1.mailfence.com
smtp2.mailfence.com

Domain Information

openarchieven.nl

Domain Age
15y 9m

Created

23.08.2010

Last Updated

18.01.2026

Registrar

team.blue nl B.V.

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.
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
2 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Helvetica

WCAG AA
71/100
Readability
/30
22/30

16px · LH 1.43

Hierarchy
/20
12/20

2x ratio

WCAG
/25
21/25

4.5:1 min contrast

Performance
/25
16/25

1 font

Heading Font

Helvetica

Sans32px

Body Font

Helvetica

Sans16px

Contrast Ratio

4.5:1

WCAG AA (≥4.5:1)

Reading Comfort

~38 CPL

Narrow lines
32px
h1
24px
h3
20px
h4
16px
p

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

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 17/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Buy on MyFontsFlesch 17

Color Palette

6 unique colors
Light
#ffffff
Background· 66.8%
#def0d8
Secondary· 14.400000000000002%
#804680
Primary· 6.1%
#608761
Secondary· 3.9%

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

9 Resources

5
Scripts
4
Styles
0
Async
0
Defer

Top Script Sources

static.openarchieven.nl(5)

Website Identity

Open Archives

www.openarchieven.nl//?lang=en
15 years old
Location detected: 🇳🇱 Netherlandsvia tld
team.blue nl B.V.en

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Last analyzed: 20 May 2026 at 02:02

Historical Analysis & Change Tracking