deltares.nl
Homepage - Met kennis meer impact | Deltares
Last scanned Aug 3, 2026, 9:00 AM · 14 views
Overall score
Excellent
Summary
Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. This website uses Nuxt. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (85/100) and performance excellent (90/100). Top issue: robots.txt not found.
Deltares
Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. Ontdek onze expertise, projecten, publicaties.
Top issues to fix
6 issues found · 1 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
2 issue(s) found
Performance
363 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+9 overall since Jul 26, 2026
- Overall
- 91
- SEO
- 90
- Security
- 85
- Performance
- 90
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Homepage - Met kennis meer impact | Deltares
- Description
- Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. Ontdek onze expertise, projecten, publicaties.
- Canonical
- https://www.deltares.nl/
- Language
- nl
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://www.deltares.nl/favicons/site.webmanifest
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
- deltares.nl
- Valid from
- Nov 6, 2025
- Valid to
- Nov 6, 2026
- Days until expiry
- 95
- SAN domains
- deltares.nl, a-cms.deltares.nl, bridge.deltares.nl, a.deltares.nl, p-bridge.deltares.nl, t.deltares.nl, t-cms.deltares.nl, www.deltares.nl, p.deltares.nl, cms.deltares.nl, a-bridge.deltares.nl, p-cms.deltares.nl, t-bridge.deltares.nl, server01.deltares.nl
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 10 · H3 7
Links
31 internal · 9 external · 20 broken
Images
9 total · 0 missing alt
Scripts / Styles
13 scripts · 0 stylesheets
JS / CSS size
82.5 KB · 136 KB
Page size
583 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://deltares.nl
- Final URL
- https://www.deltares.nl/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 352 ms
- HTML size
- 583 KB
- Redirect chain
- https://deltares.nl → https://www.deltares.nl/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does deltares.nl use?
- deltares.nl is built with Vue.js, Nuxt, Nginx.
- Is deltares.nl secure (HTTPS)?
- Yes. deltares.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Nov 6, 2026.
- Who hosts deltares.nl?
- Hosting provider information for deltares.nl is not available yet.
- What is deltares.nl's SEO score?
- deltares.nl scored 90/100 for SEO in the latest analysis (excellent).
- What is deltares.nl's overall website score?
- deltares.nl has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
- What company operates deltares.nl?
- deltares.nl is operated by Deltares. Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. Ontdek onze expertise, projecten, publicaties.
- Has deltares.nl's score changed over time?
- deltares.nl's overall score has improved by 9 points (from 82 to 91) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card