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visio.org

https://visio.org· First analyzed 14 May 2026· Updated 14 May 2026
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visio.org
Desktop screenshot of visio.org
Mobile screenshot of visio.org
Mobile

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Hosting Provider

Akamai Technologies, Inc.

IP Address

23.73.0.66

Site Location

🇳🇱 Netherlandsvia ip

Server Location

🇳🇱 Haarlem, Netherlands

ASN

AS20940

Organization

Akamai Technologies, Inc.

CDN

Akamai

WAF

Akamai

Nameservers

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint
669 ms10%
Speed Index
870 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
757 KB
62 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Akamai Technologies, Inc.
CDN
Akamai

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft Clarity

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Customer Support

1
Zendesk

SEO Analysis

D59/100
18
7
2
Meta Tags4/15
Content10/12
Headings8/8
Technical16/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
V
visio.orgvisio.org

Koninklijke Visio – expertisecentrum voor slechtziende en blinde me...

No description available for this page.

Title truncated.
Title Length71 chars

Recommended: 50-60 chars (~423px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Title is too long (71 chars, ~423px). Will be truncated in search results.
  • • Missing meta description — important for click-through rates in SERPs

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

854 URLs

robots.txt

Local SEO

Local Search Readiness

16/100
Poor
5 11 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

D45/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
12/25

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
nav
Text ratio:3%
Words:652
Token eff.:Optimal
Sections/1K:1.5
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary78w
Descriptive Headingsavg 5w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
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.
A
82/100
13
Passed
3
Critical
0
Warnings
Images & Alt Text
13/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
8/15
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.
75/100
A
77 mg
CO₂e / view
757.3 KB
Page Weight
80%
Cleaner Than
New Visitor
87 mg
vs
Returning (cached)
44 mg
Annual (10K/mo)
9.2 kg
Emission Segments
Data Center
4 mg
Network
23 mg
Device
50 mg
Resource Breakdown
JavaScript
126.2 KB
Images
451.4 KB
CSS
97.7 KB
HTML
14.2 KB
Other
67.8 KB
Green Hosting Verified
Akamai Technologies, Inc.
Provider Match
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Interactive

HTTPS

WAF

69d

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+H3

Valid From

23.04.2026

Valid Until

22.07.2026

Subject Alternative Names (1)

www.visio.org

SHA-256 Fingerprint

A6:DD:FB:D3:DB:B5:7A:0A:76:C0:38:38:FB:4C:F9:F5:49:5A:96:A4...

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=93600
cache-control
🔴 No Cache(max-age=0, no-cache, no-store)
content-encoding
📦 Gzip(gzip)
content-length
14219
content-security-policy
default-src 'self'; script-src 'self' https://embeds.iubenda...
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

relay.transip.nl
mx1.hc382-96.eu.iphmx.com
mx2.hc382-96.eu.iphmx.com

Domain Information

visio.org

Domain Age
23y 4m

Created

07.01.2003

Expires

07.01.2027

Last Updated

21.02.2026

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Privacy & Compliance

iubenda

Cookie Consent Banner
iubenda
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: iubenda
Privacy policy page linked
Data Protection Officer mentioned

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
85/100
Mobile Friendly29 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, maximum-scale=3
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Bespoke sans

WCAG Partial
73/100
Readability
/30
23/30

20px · LH 1.60

Hierarchy
/20
17/20

3.2x ratio · ✓ H1→H6

WCAG
/25
18/25

1:1 min contrast

Performance
/25
15/25

1 font · 3 req

Heading Font

Bespoke sans

Sans64px

Body Font

Bespoke sans

Sans20px

Contrast Ratio

1:1

2 issues

Reading Comfort

~34 CPL

Narrow lines
64px
h1
56px
h2
28px
h3
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 39/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 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 3.2x larger than body text.

Buy on MyFontsFlesch 39

Color Palette

9 unique colors
Light
#ada79e
Secondary· 8.4%
#0a1859
Primary· 43.599999999999994%
#ffffff
Primary· 0%
#d8c7b8
Secondary· 19.5%
#6e4b37
Secondary· 6.9%
#b17e5d
Secondary· 6.5%
#f0edea
Secondary· 4.7%
#c5ac99
Secondary· 4.5%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

1
IubendaSMB

Cookie consent and privacy compliance tools

3

Categories

5

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

15 Resources

14
Scripts
1
Styles
11
Async
0
Defer

Top Script Sources

cdn.eye-able.com(3)connect.facebook.net(2)embeds.iubenda.com(2)googletagmanager.com(2)scripts.clarity.ms(1)

Website Identity

visio.org

info@visio.org
0885858585
23 years old
Location detected: 🇳🇱 Netherlandsvia ip
Key-Systems GmbHnl-NL

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Last analyzed: 14 May 2026 at 08:20

Historical Analysis & Change Tracking