What technology does knmi.nl use?

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

Is knmi.nl secure (HTTPS)?

Yes. knmi.nl uses TLS 1.3 with a certificate issued by Amazon, valid until Feb 13, 2027.

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

What is knmi.nl's SEO score?

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

What is knmi.nl's overall website score?

knmi.nl has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

Has knmi.nl's score changed over time?

knmi.nl's overall score has declined by 1 point (from 89 to 88) since Jul 26, 2026.

knmi.nl

KNMI - Koninklijk Nederlands Meteorologisch Instituut

Last scanned Aug 2, 2026, 7:00 AM · 4 views

Overall score

Great

Summary

Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: Missing canonical link.

Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.

Top issues to fix

6 issues found · 1 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
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

Performance

345 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-1 overall since Jul 26, 2026

Overall: 88
SEO: 75
Security: 90
Performance: 90
Accessibility: 100

Organization

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

Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.

Instagram YouTube

Meta tags

Title: KNMI - Koninklijk Nederlands Meteorologisch Instituut
Description: Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.
Canonical
Language: nl
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: CloudFront
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: Amazon
Subject: www.knmi.nl
Valid from: Jan 15, 2026
Valid to: Feb 13, 2027
Days until expiry: 195
SAN domains: www.knmi.nl, cms.knmi.nl, cdn.knmi.nl, wow.knmi.nl, knmi.nl

Security headers

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

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 3 · H3 1

Links

37 internal · 5 external · 20 broken

Images

85 total · 1 missing alt

Scripts / Styles

5 scripts · 1 stylesheets

JS / CSS size

617 B · 0 B

Page size

53.2 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://knmi.nl
Final URL: https://www.knmi.nl/home
HTTP status: 200
HTTP version: HTTP/2
Response time: 344 ms
HTML size: 53.2 KB
Redirect chain: https://knmi.nl → https://www.knmi.nl:443/ → https://www.knmi.nl/home

See something wrong on this report? Request a correction

Frequently asked questions

What technology does knmi.nl use?: We did not detect any specific technologies for knmi.nl in the latest scan.
Is knmi.nl secure (HTTPS)?: Yes. knmi.nl uses TLS 1.3 with a certificate issued by Amazon, valid until Feb 13, 2027.
Who hosts knmi.nl?: Hosting provider information for knmi.nl is not available yet.
What is knmi.nl's SEO score?: knmi.nl scored 75/100 for SEO in the latest analysis (fair).
What is knmi.nl's overall website score?: knmi.nl has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
Has knmi.nl's score changed over time?: knmi.nl's overall score has declined by 1 point (from 89 to 88) since Jul 26, 2026.