cfd-online.com
CFD Online
Last scanned Jul 26, 2026, 12:19 PM
Overall score
Fair
Summary
An online center for Computational Fluid Dynamics. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is fair (65/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Missing canonical link.
An online center for Computational Fluid Dynamics. This is the largest CFD site on the net with services like discussion forums, jobs, links and a wiki.
- United States
- Hosted on Cloudflare
Top issues to fix
11 issues found · 4 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+5 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
1.43 s
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Organization
Company details published in this site's own structured data.
An online center for Computational Fluid Dynamics. This is the largest CFD site on the net with services like discussion forums, jobs, links and a wiki.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- CFD Online
- Description
- An online center for Computational Fluid Dynamics. This is the largest CFD site on the net with services like discussion forums, jobs, links and a wiki.
- Canonical
- Language
- en-US
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.70.172
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- cfd-online.com
- Valid from
- Jun 8, 2026
- Valid to
- Sep 6, 2026
- Days until expiry
- 39
- SAN domains
- cfd-online.com, *.cfd-online.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
269 internal · 3 external · 0 broken
Images
7 total · 2 missing alt
Scripts / Styles
5 scripts · 0 stylesheets
JS / CSS size
39.1 KB · 91 B
Page size
33.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 42
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- More than 20% of images are missing alt text
- No H1 heading found
- Missing viewport meta tag
Scan details
- Requested URL
- https://cfd-online.com
- Final URL
- https://www.cfd-online.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.43 s
- HTML size
- 33.0 KB
- Redirect chain
- https://cfd-online.com → https://www.cfd-online.com/
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Frequently asked questions
- What technology does cfd-online.com use?
- cfd-online.com is built with Google Analytics, Cloudflare Analytics.
- Is cfd-online.com secure (HTTPS)?
- Yes. cfd-online.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 6, 2026.
- Who hosts cfd-online.com?
- cfd-online.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is cfd-online.com's SEO score?
- cfd-online.com scored 65/100 for SEO in the latest analysis (fair).
- What is cfd-online.com's overall website score?
- cfd-online.com has an overall SiteGraph score of 72/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card