caltech.edu
Home - www.caltech.edu
Last scanned Jul 31, 2026, 7:00 PM · 7 views
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 Cloudflare Analytics behind Cloudflare CDN. SEO is good (75/100) 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.
Top issues to fix
7 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.
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.
Sluggish estimated load (3.2s)
PerformanceTarget under 3 seconds: enable compression and serve static assets from a CDN.
+1 more issue — details in the sections below.
SEO
4 issue(s) found
Performance
3.16 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-1 overall since Jul 24, 2026
- Overall
- 73
- SEO
- 75
- Security
- 50
- Performance
- 70
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
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
- —
- CDN provider
- Cloudflare
- 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
- Internet2
- Subject
- oscweb.caltech.edu
- Valid from
- Nov 3, 2025
- Valid to
- Dec 4, 2026
- Days until expiry
- 126
- 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
51 internal · 124 external · 20 broken
Images
122 total · 1 missing alt
Scripts / Styles
18 scripts · 3 stylesheets
JS / CSS size
1.9 KB · 0 B
Page size
406 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- robots.txt not 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
- 3.15 s
- HTML size
- 406 KB
- Redirect chain
- https://caltech.edu → https://www.caltech.edu/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does caltech.edu use?
- caltech.edu is built with jQuery, 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?
- Hosting provider information for caltech.edu is not available yet.
- What is caltech.edu's SEO score?
- caltech.edu scored 75/100 for SEO in the latest analysis (fair).
- What is caltech.edu's overall website score?
- caltech.edu has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.
- Has caltech.edu's score changed over time?
- caltech.edu's overall score has declined by 1 point (from 74 to 73) since Jul 24, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card