calibre-ebook.com
calibre - E-book management
Last scanned Jul 25, 2026, 12:25 PM · 2 views
Overall score
Great
Summary
calibre: The one stop solution for all your e-book needs. This website uses Nginx hosted on OVH - OVH SAS, FR. SEO is fair (70/100) and accessibility is excellent (95/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
calibre: The one stop solution for all your e-book needs. Comprehensive e-book software.
- United States
- Hosted on OVH - OVH SAS, FR
Top issues to fix
10 issues found · 3 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 viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+4 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
190 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
calibre: The one stop solution for all your e-book needs. Comprehensive e-book software.
Contact
Email, phone, and address published on this site's own pages.
Source: https://calibre-ebook.com/help
Meta tags
- Title
- calibre - E-book management
- Description
- calibre: The one stop solution for all your e-book needs. Comprehensive e-book software.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- OVH - OVH SAS, FR
- CDN provider
- —
- IP address
- 15.204.223.162
- ASN
- AS16276 (OVH - OVH SAS, FR)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- calibre-ebook.com
- Valid from
- Jul 19, 2026
- Valid to
- Oct 17, 2026
- Days until expiry
- 83
- SAN domains
- calibre-ebook.com, main.calibre-ebook.com, manual.calibre-ebook.com, plugins.calibre-ebook.com, www.calibre-ebook.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 2 · H3 0
Links
10 internal · 1 external · 0 broken
Images
3 total · 0 missing alt
Scripts / Styles
10 scripts · 3 stylesheets
JS / CSS size
133 KB · 10.9 KB
Page size
33.7 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
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing viewport meta tag
Scan details
- Requested URL
- https://calibre-ebook.com
- Final URL
- https://calibre-ebook.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 190 ms
- HTML size
- 33.7 KB
- Redirect chain
- https://calibre-ebook.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does calibre-ebook.com use?
- calibre-ebook.com is built with jQuery, Google Analytics, Nginx.
- Is calibre-ebook.com secure (HTTPS)?
- Yes. calibre-ebook.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 17, 2026.
- Who hosts calibre-ebook.com?
- calibre-ebook.com is hosted on OVH - OVH SAS, FR.
- What is calibre-ebook.com's SEO score?
- calibre-ebook.com scored 70/100 for SEO in the latest analysis (fair).
- What is calibre-ebook.com's overall website score?
- calibre-ebook.com has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card