zybooks.com
zyBooks
Last scanned Aug 6, 2026, 5:00 AM · 8 views
Overall score
Great
Summary
zyBooks is an educational software company, developing interactive STEM materials and coursework for college courses in Science, Technology, Engineering and Math. This website uses WordPress behind Cloudflare CDN. SEO is good (80/100) and accessibility is good (75/100). Security scores good (85/100) and performance excellent (90/100). Top issue: No H1 heading found.
zyBooks
zyBooks is an educational software company, developing interactive STEM materials and coursework for college courses in Science, Technology, Engineering and Math.
Top issues to fix
7 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.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
More than 20% of images are missing alt text
AccessibilityAdd alt attributes to the remaining images (use alt="" for purely decorative ones).
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
530 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
-3 overall since Jul 26, 2026
- Overall
- 83
- SEO
- 80
- Security
- 85
- Performance
- 90
- Accessibility
- 75
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- zyBooks
- Description
- Help students succeed and save instructors time with AI tools and auto-graded learning solutions
- Canonical
- https://www.zybooks.com/home/
- Language
- en-US
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
- 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
- Let's Encrypt
- Subject
- www.zybooks.com
- Valid from
- Jun 29, 2026
- Valid to
- Sep 27, 2026
- Days until expiry
- 52
- SAN domains
- www.zybooks.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 0 · H2 5 · H3 8
Links
68 internal · 12 external · 1 broken
Images
14 total · 3 missing alt
Scripts / Styles
77 scripts · 75 stylesheets
JS / CSS size
11.7 KB · 75.3 KB
Page size
392 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
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- More than 20% of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://zybooks.com
- Final URL
- https://www.zybooks.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 522 ms
- HTML size
- 392 KB
- Redirect chain
- https://zybooks.com → https://www.zybooks.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does zybooks.com use?
- zybooks.com is built with WordPress, jQuery, Google Analytics, Google Ads, Meta Pixel.
- Is zybooks.com secure (HTTPS)?
- Yes. zybooks.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 27, 2026.
- Who hosts zybooks.com?
- Hosting provider information for zybooks.com is not available yet.
- What is zybooks.com's SEO score?
- zybooks.com scored 80/100 for SEO in the latest analysis (great).
- What is zybooks.com's overall website score?
- zybooks.com has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
- What company operates zybooks.com?
- zybooks.com is operated by zyBooks. zyBooks is an educational software company, developing interactive STEM materials and coursework for college courses in Science, Technology, Engineering and Math.
- Has zybooks.com's score changed over time?
- zybooks.com's overall score has declined by 3 points (from 86 to 83) since Jul 26, 2026.
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