What technology does duo.nl use?

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

Is duo.nl secure (HTTPS)?

Yes. duo.nl uses TLS 1.3 with a certificate issued by DigiCert Ireland Limited, valid until Jan 23, 2027.

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

What is duo.nl's SEO score?

duo.nl scored 75/100 for SEO in the latest analysis (fair).

What is duo.nl's overall website score?

duo.nl has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.

Has duo.nl's score changed over time?

duo.nl's overall score has improved by 1 point (from 92 to 93) since Jul 26, 2026.

duo.nl

DUO - Particulier

Last scanned Aug 3, 2026, 9:00 AM · 9 views

Overall score

Excellent

Summary

Informatie voor studenten, terugbetalers en leraren. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Missing canonical link.

Informatie voor studenten, terugbetalers en leraren. Informatie over studiefinanciering, studieschuld, reizen, lesgeld, diploma’s en staatsexamens.

Top issues to fix

5 issues found

Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
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.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

4 issue(s) found

100

Performance

391 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+1 overall since Jul 26, 2026

Overall: 93
SEO: 75
Security: 100
Performance: 100
Accessibility: 100

Organization

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

Informatie voor studenten, terugbetalers en leraren. Informatie over studiefinanciering, studieschuld, reizen, lesgeld, diploma’s en staatsexamens.

Meta tags

Title: DUO - Particulier
Description: Informatie voor studenten, terugbetalers en leraren. Informatie over studiefinanciering, studieschuld, reizen, lesgeld, diploma’s en staatsexamens.
Canonical
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: DigiCert Ireland Limited
Subject: www.duo.nl
Valid from: Jul 9, 2026
Valid to: Jan 23, 2027
Days until expiry: 173
SAN domains: www.duo.nl, duo.nl, data.duo.nl, mijnduo.nl, www.mijnduo.nl, diplomaregister.nl, www.diplomaregister.nl, examenloket.nl, www.examenloket.nl, bron.nl, www.bron.nl, bezwaarschriftenocw.nl, www.bezwaarschriftenocw.nl, rio-kennisbank.duo.nl, mijndiploma.nl, www.mijndiploma.nl, mijndiplomas.nl, www.mijndiplomas.nl, mijnwft.nl, www.mijnwft.nl, werkenbijduo.nl, www.werkenbijduo.nl

Security headers

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

Compression: none · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 25 · H3 0

Links

49 internal · 1 external · 20 broken

Images

4 total · 0 missing alt

Scripts / Styles

6 scripts · 2 stylesheets

JS / CSS size

1.5 KB · 134 B

Page size

28.8 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
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://duo.nl
Final URL: https://duo.nl/particulier/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 391 ms
HTML size: 28.8 KB
Redirect chain: https://duo.nl → https://duo.nl/particulier/

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Frequently asked questions

What technology does duo.nl use?: We did not detect any specific technologies for duo.nl in the latest scan.
Is duo.nl secure (HTTPS)?: Yes. duo.nl uses TLS 1.3 with a certificate issued by DigiCert Ireland Limited, valid until Jan 23, 2027.
Who hosts duo.nl?: Hosting provider information for duo.nl is not available yet.
What is duo.nl's SEO score?: duo.nl scored 75/100 for SEO in the latest analysis (fair).
What is duo.nl's overall website score?: duo.nl has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.
Has duo.nl's score changed over time?: duo.nl's overall score has improved by 1 point (from 92 to 93) since Jul 26, 2026.