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SGSiteGraph

passivehouse.com

Home PHI

Last scanned Jul 26, 2026, 3:19 PM

81

Overall score

Great

Summary

This website uses Apache hosted on HETZNER-AS - Hetzner Online GmbH, DE. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance good (80/100). Top issue: Missing meta description.

Passive House Institute GmbH

Germany
Hosted on HETZNER-AS - Hetzner Online GmbH, DE

Top issues to fix

9 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • 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.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

+3 more issues — details in the sections below.

70

SEO

5 issue(s) found

80

Performance

1.09 s

80

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

Passive House Institute GmbH

FacebookYouTubeflickr.comLinkedIn

Meta tags

Title
Home PHI
Description
Canonical
Language
en
Charset
Viewport
width=device-width,initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQueryApache

Hosting & CDN

CDN provider
—
IP address
135.181.123.140
ASN
AS24940 (HETZNER-AS - Hetzner Online GmbH, DE)

DNS records

TypeValue
A
  • 135.181.123.140
AAAA—
MX
  • mx01.ionos.de
  • mx00.ionos.de
TXT
  • v=spf1 -all
NS
  • ns1092.ui-dns.com
  • ns1092.ui-dns.org
  • ns1092.ui-dns.de
  • ns1092.ui-dns.biz
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
passivehouse.com
Valid from
Jul 10, 2026
Valid to
Oct 8, 2026
Days until expiry
73
SAN domains
passivehouse.com, www.passivehouse.com

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 4 · H2 0 · H3 1

Links

17 internal · 17 external · 3 broken

Images

15 total · 1 missing alt

Scripts / Styles

9 scripts · 2 stylesheets

JS / CSS size

610 KB · 973 KB

Page size

30.9 KB

Robots.txt & Sitemap

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

SEO issues

  • Missing meta description
  • Missing canonical link
  • Multiple H1 headings found
  • Missing OpenGraph tags
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://passivehouse.com
Final URL
https://passivehouse.com/en/home/
HTTP status
200
HTTP version
HTTP/1.1
Response time
1.09 s
HTML size
30.9 KB
Redirect chain
https://passivehouse.com → https://passivehouse.com/home/ → https://passivehouse.com/en/home/

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Frequently asked questions

What technology does passivehouse.com use?
passivehouse.com is built with jQuery, Apache.
Is passivehouse.com secure (HTTPS)?
Yes. passivehouse.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 8, 2026.
Who hosts passivehouse.com?
passivehouse.com is hosted on HETZNER-AS - Hetzner Online GmbH, DE.
What is passivehouse.com's SEO score?
passivehouse.com scored 70/100 for SEO in the latest analysis (fair).
What is passivehouse.com's overall website score?
passivehouse.com has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
What company operates passivehouse.com?
passivehouse.com is operated by Passive House Institute GmbH.