isbndb.com
The World's Largest Book Database - ISBN Database | ISBNdb
Last scanned Jul 27, 2026, 4:43 PM
Overall score
Excellent
Summary
ISBNdb is the world's largest book database and API with over 110+ million unique ISBNs and up to 19 data points per book. This website uses WordPress hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
ISBNdb
ISBNdb is the world's largest book database and API with over 110+ million unique ISBNs and up to 19 data points per book.
- United States
- Hosted on Cloudflare
Products & pricing
Product and pricing information published in this site's own structured data.
ISBN Database Pricing
$14.99 USD
Top issues to fix
4 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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
SEO
2 issue(s) found
Performance
514 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
ISBNdb
ISBNdb is the world's largest book database and API with over 110+ million unique ISBNs and up to 19 data points per book.
- Founded
- Aug 12, 2001
Contact
Email, phone, and address published on this site's own pages.
- support@isbndb.com
Meta tags
- Title
- The World's Largest Book Database - ISBN Database | ISBNdb
- Description
- The ISBNdb book database includes over 31 million unique ISBNs with up to 19 data points per book and is searchable via API. Retrieve book information from ISBN database on the go!
- Canonical
- https://isbndb.com/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.9.43
- 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
- isbndb.com
- Valid from
- Jun 24, 2026
- Valid to
- Sep 22, 2026
- Days until expiry
- 56
- SAN domains
- isbndb.com, dumps.isbndb.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 9 · H3 44
Links
68 internal · 3 external · 0 broken
Images
42 total · 3 missing alt
Scripts / Styles
63 scripts · 52 stylesheets
JS / CSS size
1.9 KB · 0 B
Page size
85.7 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 24
- sitemap.xml
- Found
- URLs in sitemap
- 81
SEO issues
- Meta description longer than 160 characters
- Missing OpenGraph tags
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://isbndb.com
- Final URL
- https://isbndb.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 513 ms
- HTML size
- 85.7 KB
- Redirect chain
- https://isbndb.com
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Frequently asked questions
- What technology does isbndb.com use?
- isbndb.com is built with WordPress, Drupal, Bootstrap, jQuery, Cloudflare Analytics.
- Is isbndb.com secure (HTTPS)?
- Yes. isbndb.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 22, 2026.
- Who hosts isbndb.com?
- isbndb.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is isbndb.com's SEO score?
- isbndb.com scored 90/100 for SEO in the latest analysis (excellent).
- What is isbndb.com's overall website score?
- isbndb.com has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.
- What company operates isbndb.com?
- isbndb.com is operated by ISBNdb. ISBNdb is the world's largest book database and API with over 110+ million unique ISBNs and up to 19 data points per book.
- What products does isbndb.com offer?
- isbndb.com offers ISBN Database Pricing.
OpenGraph & Twitter Card
OpenGraph
Twitter Card