numdam.org
Numdam
Last scanned Jul 27, 2026, 9:43 AM · 1 view
Overall score
Fair
Summary
This website uses Apache hosted on FR-TIGRE - Renater, EU. SEO is fair (55/100) and accessibility is fair (60/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Missing meta description.
- France
- Hosted on FR-TIGRE - Renater, EU
Top issues to fix
11 issues found · 5 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 meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
+5 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
236 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Numdam
- Description
- Canonical
- Language
- fr
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- FR-TIGRE - Renater, EU
- CDN provider
- —
- IP address
- 129.88.220.36
- ASN
- AS1942 (FR-TIGRE - Renater, EU)
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.numdam.org
- Valid from
- Jul 15, 2026
- Valid to
- Oct 13, 2026
- Days until expiry
- 78
- SAN domains
- numdam.org, www.numdam.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 0 · H2 1 · H3 0
Links
33 internal · 13 external · 1 broken
Images
26 total · 24 missing alt
Scripts / Styles
16 scripts · 12 stylesheets
JS / CSS size
189 KB · 278 KB
Page size
25.5 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 3
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://numdam.org
- Final URL
- https://numdam.org
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 236 ms
- HTML size
- 25.5 KB
- Redirect chain
- https://numdam.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does numdam.org use?
- numdam.org is built with Django, Bootstrap, jQuery, Apache.
- Is numdam.org secure (HTTPS)?
- Yes. numdam.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 13, 2026.
- Who hosts numdam.org?
- numdam.org is hosted on FR-TIGRE - Renater, EU.
- What is numdam.org's SEO score?
- numdam.org scored 55/100 for SEO in the latest analysis (fair).
- What is numdam.org's overall website score?
- numdam.org has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card