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ndss.org

https://ndss.org· First analyzed 28 Apr 2026· Updated 28 Apr 2026
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ndss.org
Desktop screenshot of ndss.org
Mobile screenshot of ndss.org
Mobile

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Hosting Provider

Pantheon
pantheon.io

IP Address

23.185.0.2

Site Location

🇺🇸 United Statesvia phone

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

Pantheon

Server

Nginx

CDN

Fastly

Nameservers

jim.ns.cloudflare.com.sima.ns.cloudflare.com.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
712 ms10%
Speed Index
926 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
12.4 MB
56 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Shopify
ecommerce
Shopify Theme
Shopify Theme

Detected Apps

Facebook ChannelInstagram ShoppingTikTok

Technology Stack

9 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

SEO Analysis

C63/100
18
7
1
Meta Tags8/15
Content11/12
Headings3/8
Technical16/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile2/4
Indexability3/3
N
ndss.orgndss.org

National Down Syndrome Society (NDSS)

Human Rights Organization for Individuals with Down syndrome

Title Length37 chars

Recommended: 50-60 chars (~228px / 580px)

Description Length60 chars

Recommended: 120-160 chars

Issues (1)

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

8 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

52 rules

Local SEO

Local Search Readiness

18/100
Poor
6 9 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

D48/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
18/25

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:4%
Words:667
Token eff.:Optimal
Sections/1K:13.5
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary44w
Descriptive Headingsavg 7.4w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
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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
12
Passed
3
Critical
0
Warnings
Images & Alt Text
15/20
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
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
13/15
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.
2 recommendations
  • •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.
24/100
F
1.57 g
CO₂e / view
12.4 MB
Page Weight
5%
Cleaner Than
New Visitor
1.80 g
vs
Returning (cached)
898 mg
Annual (10K/mo)
188.6 kg
Emission Segments
Data Center
351 mg
Network
377 mg
Device
844 mg
Resource Breakdown
JavaScript
457.1 KB
Images
11.7 MB
CSS
288.1 KB
Fonts
2.0 KB
HTML
19.9 KB
Green Hosting Not Verified
Pantheon
7 recommendations
  • •Carbon footprint recommendation preview...
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A+

Security Score

93%Excellent
Static / Informational

HTTPS

No WAF

62d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

31.03.2026

Valid Until

29.06.2026

Subject Alternative Names (2)

ndss.orgwww.ndss.org

SHA-256 Fingerprint

66:DF:2C:00:A4:03:35:61:18:9A:2B:D2:1A:28:4C:B7:E5:E3:EB:27...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
679
cache-control
🟡 900s(max-age=900, public)
content-encoding
📦 Gzip(gzip)
content-language
en
content-length
20038
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

ndss-org.mail.protection.outlook.com

Domain Information

ndss.org

Domain Age
29y 8m

Created

20.08.1996

Expires

19.08.2026

Last Updated

03.10.2023

Registrar

Name.com, Inc.

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.
B
76/100
Mobile Friendly5 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=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
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Typography & Readability

lora + urbanist

WCAG Partial
68/100
Readability
/30
23/30

16px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
17/25

1:1 min contrast

Performance
/25
20/25

2 fonts · 1 req

Heading Font

lora

Serif

Body Font

urbanist

Sans16px

Contrast Ratio

1:1

8 issues

Reading Comfort

~41 CPL

Narrow lines
90px
h2
25px
h3
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

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

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

GGoogle FontsFluid Type (rem)Flesch 35

Color Palette

12 unique colors
3.41:1 AA Large Light
#ffffff
Background· 26.500000000000004%
#8b8a93
Other· 5.2%
#173f7b
Primary· 15.200000000000001%
#d5343f
Primary· 10%
#0a080c
Secondary· 7.9%
#cbd0d5
Secondary· 7.2%
#52465c
Secondary· 7%
#c6a29c
Secondary· 5.5%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
ContentsquareEnterprise

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

4

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

26 Resources

20
Scripts
6
Styles
13
Async
0
Defer

Top Script Sources

googletagmanager.com(4)local(3)google-analytics.com(2)connect.facebook.net(2)kit.fontawesome.com(2)

Website Identity

ndss.org

+1-800-221-4602
29 years old
Location detected: 🇺🇸 United Statesvia phone
Name.com, Inc.📧 Microsoft 365en

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Last analyzed: 28 Apr 2026 at 04:56

Historical Analysis & Change Tracking