ou.nl
Homepage - Open Universiteit - Open Universiteit
Last scanned Aug 3, 2026, 2:00 PM · 15 views
Overall score
Great
Summary
Universitair studeren, zoals jij dat wilt. This website uses Apache. SEO is fair (70/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: No H1 heading found.
Universitair studeren, zoals jij dat wilt. Van korte studie tot volledige bachelor en master. Persoonlijk en online, prima te combineren met werk en privé.
Top issues to fix
8 issues found · 3 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.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
3 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+2 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
402 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
+4 overall since Jul 26, 2026
- Overall
- 81
- SEO
- 70
- Security
- 90
- Performance
- 100
- Accessibility
- 60
Organization
Company details published in this site's own structured data.
Universitair studeren, zoals jij dat wilt. Van korte studie tot volledige bachelor en master. Persoonlijk en online, prima te combineren met werk en privé.
Meta tags
- Title
- Homepage - Open Universiteit - Open Universiteit
- Description
- Universitair studeren, zoals jij dat wilt. Van korte studie tot volledige bachelor en master. Persoonlijk en online, prima te combineren met werk en privé.
- Canonical
- https://www.ou.nl/home
- Language
- nl-NL
- Charset
- UTF-8
- Viewport
- initial-scale=1.0, width=device-width
- Robots meta
- index, follow
- Manifest
- https://www.ou.nl/o/corp-theme/images/favicon/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- 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
- Hellenic Academic and Research Institutions CA
- Subject
- ou.nl
- Valid from
- Oct 31, 2025
- Valid to
- Oct 31, 2026
- Days until expiry
- 88
- SAN domains
- ou.nl, www.ou.nl
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 3 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 1
Links
115 internal · 3 external · 1 broken
Images
12 total · 12 missing alt
Scripts / Styles
53 scripts · 8 stylesheets
JS / CSS size
36.5 KB · 3.4 KB
Page size
155 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
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://ou.nl
- Final URL
- https://www.ou.nl/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 399 ms
- HTML size
- 155 KB
- Redirect chain
- https://ou.nl → https://www.ou.nl/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does ou.nl use?
- ou.nl is built with React, Bootstrap, jQuery, Google Analytics, Apache.
- Is ou.nl secure (HTTPS)?
- Yes. ou.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Oct 31, 2026.
- Who hosts ou.nl?
- Hosting provider information for ou.nl is not available yet.
- What is ou.nl's SEO score?
- ou.nl scored 70/100 for SEO in the latest analysis (fair).
- What is ou.nl's overall website score?
- ou.nl has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Has ou.nl's score changed over time?
- ou.nl's overall score has improved by 4 points (from 77 to 81) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card