What technology does universiteitleiden.nl use?

We did not detect any specific technologies for universiteitleiden.nl in the latest scan.

Is universiteitleiden.nl secure (HTTPS)?

Yes. universiteitleiden.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 6, 2027.

Who hosts universiteitleiden.nl?

Hosting provider information for universiteitleiden.nl is not available yet.

What is universiteitleiden.nl's SEO score?

universiteitleiden.nl scored 70/100 for SEO in the latest analysis (fair).

What is universiteitleiden.nl's overall website score?

universiteitleiden.nl has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.

Has universiteitleiden.nl's score changed over time?

universiteitleiden.nl's overall score has declined by 1 point (from 92 to 91) since Jul 25, 2026.

universiteitleiden.nl

Home - Universiteit Leiden

Last scanned Aug 1, 2026, 7:00 AM · 7 views

Overall score

Excellent

Summary

De Universiteit Leiden is een internationaal georiënteerde universiteit met een breed palet aan talentgericht onderwijs voor goede en gemotiveerde studenten, dat wordt geïnspireerd door wetenschappelijk onderzoek. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Top issues to fix

7 issues found

1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

SEO

5 issue(s) found

100

Performance

252 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-1 overall since Jul 25, 2026

Overall: 91
SEO: 70
Security: 100
Performance: 100
Accessibility: 100

Organization

Company details published in this site's own structured data.

YouTube LinkedIn Instagram

Meta tags

Title: Home - Universiteit Leiden
Description: De Universiteit Leiden is een internationaal georiënteerde universiteit met een breed palet aan talentgericht onderwijs voor goede en gemotiveerde studenten, dat wordt geïnspireerd door wetenschappelijk onderzoek.
Canonical: https://www.universiteitleiden.nl/
Language: nl
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

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: www.universiteitleiden.nl
Valid from: Jul 22, 2026
Valid to: Feb 6, 2027
Days until expiry: 189
SAN domains: www.universiteitleiden.nl, www.luf.nl, staff.universiteitleiden.nl, universiteitleiden.nl, gtm.universiteitleiden.nl, www.organisatiegids.universiteitleiden.nl, www.library.universiteitleiden.nl, organisatiegids.universiteitleiden.nl, luf.nl, www.researchsupport.universiteitleiden.nl, researchsupport.universiteitleiden.nl, medewerkers.universiteitleiden.nl, bibliotheek.universiteitleiden.nl, www.student.universiteitleiden.nl, cms.universiteitleiden.nl, www.bibliotheek.universiteitleiden.nl, www.medewerkers.universiteitleiden.nl, library.universiteitleiden.nl, student.universiteitleiden.nl, www.staff.universiteitleiden.nl

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyMissing

Compression: gzip · 3 cookie(s) observed

Content & assets

Headings

H1 2 · H2 7 · H3 0

Links

47 internal · 18 external · 20 broken

Images

5 total · 0 missing alt

Scripts / Styles

5 scripts · 1 stylesheets

JS / CSS size

745 B · 0 B

Page size

22.4 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Meta description longer than 160 characters
Multiple H1 headings found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://universiteitleiden.nl
Final URL: https://www.universiteitleiden.nl/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 252 ms
HTML size: 22.4 KB
Redirect chain: https://universiteitleiden.nl → https://www.universiteitleiden.nl/

See something wrong on this report? Request a correction

Frequently asked questions

What technology does universiteitleiden.nl use?: We did not detect any specific technologies for universiteitleiden.nl in the latest scan.
Is universiteitleiden.nl secure (HTTPS)?: Yes. universiteitleiden.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 6, 2027.
Who hosts universiteitleiden.nl?: Hosting provider information for universiteitleiden.nl is not available yet.
What is universiteitleiden.nl's SEO score?: universiteitleiden.nl scored 70/100 for SEO in the latest analysis (fair).
What is universiteitleiden.nl's overall website score?: universiteitleiden.nl has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
Has universiteitleiden.nl's score changed over time?: universiteitleiden.nl's overall score has declined by 1 point (from 92 to 91) since Jul 25, 2026.