caltech.edu
Home - www.caltech.edu
Last scanned Jul 24, 2026, 6:17 PM
Overall score
Fair
Summary
The California Institute of Technology aims to expand human knowledge and benefit society through research integrated with education. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores fair (50/100) and performance fair (70/100). Top issue: Missing canonical link.
The California Institute of Technology aims to expand human knowledge and benefit society through research integrated with education.
- United States
- Hosted on Cloudflare
Top issues to fix
5 issues found · 1 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
Sluggish estimated load (3.0s)
PerformanceTarget under 3 seconds: enable compression and serve static assets from a CDN.
SEO
3 issue(s) found
Performance
3.02 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
Source: https://www.caltech.edu/contact
Meta tags
- Title
- Home - www.caltech.edu
- Description
- The California Institute of Technology aims to expand human knowledge and benefit society through research integrated with education.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.64.151.221
- 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
- Internet2
- Subject
- oscweb.caltech.edu
- Valid from
- Nov 3, 2025
- Valid to
- Dec 4, 2026
- Days until expiry
- 133
- SAN domains
- oscweb.caltech.edu, *.oscweb-test.caltech.edu, *.oscweb.caltech.edu, *.staging.caltech.edu, *.test.caltech.edu, caltech.edu, caltech.info, caltech.net, caltech.org, emergency.caltech.edu, foundations.caltech.edu, images.divisions-test.caltech.edu, images.divisions.caltech.edu, images.sites-test.caltech.edu, images.sites.caltech.edu, images.test.caltech.edu, images.www.caltech.edu, main.caltech.edu, main.test.caltech.edu, media.caltech.edu, mockwww.caltech.edu, mockwww.test.caltech.edu, mr.caltech.edu, news.caltech.edu, nobel.caltech.edu, oscweb-test.caltech.edu, staging.caltech.edu, test.caltech.edu, today.caltech.edu, www-prod.caltech.edu, www-scratch.caltech.edu, www.caltech.edu, www.caltech.info, www.caltech.net, www.caltech.org, www.test.caltech.edu
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 7 · H3 9
Links
50 internal · 127 external · 0 broken
Images
306 total · 1 missing alt
Scripts / Styles
21 scripts · 3 stylesheets
JS / CSS size
254 KB · 12.2 KB
Page size
407 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 5
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://caltech.edu
- Final URL
- https://www.caltech.edu/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 3.01 s
- HTML size
- 407 KB
- Redirect chain
- https://caltech.edu → https://www.caltech.edu/
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Frequently asked questions
- What technology does caltech.edu use?
- caltech.edu is built with jQuery, Google Analytics, Cloudflare Analytics.
- Is caltech.edu secure (HTTPS)?
- Yes. caltech.edu uses TLS 1.3 with a certificate issued by Internet2, valid until Dec 4, 2026.
- Who hosts caltech.edu?
- caltech.edu is hosted on Cloudflare, behind Cloudflare CDN.
- What is caltech.edu's SEO score?
- caltech.edu scored 80/100 for SEO in the latest analysis (great).
- What is caltech.edu's overall website score?
- caltech.edu has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card