deltares.nl
Homepage - Met kennis meer impact | Deltares
Last scanned Jul 26, 2026, 5:35 AM
Overall score
Great
Summary
Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. This website uses Nuxt hosted on NL-BIT - BIT BV, NL. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (85/100) and performance fair (55/100). Top issue: No structured data (JSON-LD) found.
Deltares is een onafhankelijk instituut voor toegepast onderzoek op het gebied van water en ondergrond. Ontdek onze expertise, projecten, publicaties.
- Netherlands
- Hosted on NL-BIT - BIT BV, NL
Top issues to fix
6 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Slow estimated load (5.8s)
PerformanceUse a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
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.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
2 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
1 issue(s) found
Performance
5.75 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
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
- NL-BIT - BIT BV, NL
- CDN provider
- —
- IP address
- 178.22.57.108
- ASN
- AS12859 (NL-BIT - BIT BV, NL)
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
- 102
- 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 · 2 broken
Images
9 total · 0 missing alt
Scripts / Styles
13 scripts · 0 stylesheets
JS / CSS size
1.9 MB · 136 KB
Page size
580 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 3
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- No structured data (JSON-LD) 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
- 5.74 s
- HTML size
- 580 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?
- deltares.nl is hosted on NL-BIT - BIT BV, NL.
- 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 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card