hypertextbook.com
hypertextbook
Last scanned Jul 27, 2026, 3:43 PM
Overall score
Excellent
Summary
Free books to read and enjoy online. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
hypertextbook
Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, cycling, education, media, skepticism, West Africa, and more.
- United States
- Hosted on Cloudflare
Top issues to fix
5 issues found · 2 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.
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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
SEO
1 issue(s) found
Performance
494 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
hypertextbook
Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, cycling, education, media, skepticism, West Africa, and more.
Meta tags
- Title
- hypertextbook
- Description
- Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, cycling, education, media, skepticism, West Africa, and more.
- Canonical
- https://hypertextbook.com
- Language
- en
- Charset
- utf-8
- Viewport
- width=416
- Robots meta
- Manifest
- https://hypertextbook.com/hypertextbook/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.136.155
- 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
- hypertextbook.com
- Valid from
- Jun 6, 2026
- Valid to
- Sep 4, 2026
- Days until expiry
- 38
- SAN domains
- hypertextbook.com, *.hypertextbook.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 1 · H2 0 · H3 0
Links
9 internal · 3 external · 0 broken
Images
3 total · 0 missing alt
Scripts / Styles
6 scripts · 1 stylesheets
JS / CSS size
40.6 KB · 4.7 KB
Page size
26.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 31
- sitemap.xml
- Found
- URLs in sitemap
- 710
SEO issues
- Meta description longer than 160 characters
Accessibility issues
No accessibility issues detected.
Team
People listed on this site's own team or about page.
Scan details
- Requested URL
- https://hypertextbook.com
- Final URL
- https://hypertextbook.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 494 ms
- HTML size
- 26.0 KB
- Redirect chain
- https://hypertextbook.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does hypertextbook.com use?
- hypertextbook.com is built with Google Analytics, Cloudflare Analytics.
- Is hypertextbook.com secure (HTTPS)?
- Yes. hypertextbook.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 4, 2026.
- Who hosts hypertextbook.com?
- hypertextbook.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is hypertextbook.com's SEO score?
- hypertextbook.com scored 95/100 for SEO in the latest analysis (excellent).
- What is hypertextbook.com's overall website score?
- hypertextbook.com has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
- What company operates hypertextbook.com?
- hypertextbook.com is operated by hypertextbook. Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, cycling, education, media, skepticism, West Africa, and more.
OpenGraph & Twitter Card
OpenGraph
Twitter Card