ndss.org
National Down Syndrome Society (NDSS)
Last scanned Aug 4, 2026, 7:00 AM · 15 views
Overall score
Great
Summary
Creating a world where individuals with Down syndrome thrive. This website uses Shopify behind Fastly CDN. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance good (75/100). Top issue: No H1 heading found.
Creating a world where individuals with Down syndrome thrive
Top issues to fix
5 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
4 issue(s) found
Performance
221 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-2 overall since Jul 27, 2026
- Overall
- 80
- SEO
- 70
- Security
- 90
- Performance
- 75
- Accessibility
- 90
Organization
Company details published in this site's own structured data.
Creating a world where individuals with Down syndrome thrive
Contact
Email, phone, and address published on this site's own pages.
- Phone
- +1-800-221-4602
Meta tags
- Title
- National Down Syndrome Society (NDSS)
- Description
- Creating a world where individuals with Down syndrome thrive
- Canonical
- https://ndss.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Fastly
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- ndss.org
- Valid from
- Jul 29, 2026
- Valid to
- Oct 27, 2026
- Days until expiry
- 84
- SAN domains
- ndss.org, www.ndss.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 6 · H3 4
Links
72 internal · 10 external · 0 broken
Images
30 total · 0 missing alt
Scripts / Styles
40 scripts · 5 stylesheets
JS / CSS size
1.6 MB · 1.2 MB
Page size
91.1 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No H1 heading found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://ndss.org
- Final URL
- https://ndss.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 220 ms
- HTML size
- 91.1 KB
- Redirect chain
- https://ndss.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does ndss.org use?
- ndss.org is built with React, Drupal, Shopify, jQuery, Google Analytics, Meta Pixel, Nginx.
- Is ndss.org secure (HTTPS)?
- Yes. ndss.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 27, 2026.
- Who hosts ndss.org?
- Hosting provider information for ndss.org is not available yet.
- What is ndss.org's SEO score?
- ndss.org scored 70/100 for SEO in the latest analysis (fair).
- What is ndss.org's overall website score?
- ndss.org has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.
- Has ndss.org's score changed over time?
- ndss.org's overall score has declined by 2 points (from 82 to 80) since Jul 27, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card