opensensemap.org
openSenseMap.org
Last scanned Jul 27, 2026, 8:44 AM · 1 view
Overall score
Fair
Summary
openSenseMap.org is a platform for publishing and visualizing environmental sensor data. This website is hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE. SEO is fair (65/100) and accessibility is fair (50/100). Security scores good (80/100) and performance good (85/100). Top issue: Missing canonical link.
openSenseMap.org is a platform for publishing and visualizing environmental sensor data.
- Germany
- Hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE
Top issues to fix
10 issues found · 4 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+4 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
255 ms
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Organization
Company details published in this site's own structured data.
openSenseMap.org is a platform for publishing and visualizing environmental sensor data.
Meta tags
- Title
- openSenseMap.org
- Description
- openSenseMap.org is a platform for publishing and visualizing environmental sensor data.
- Canonical
- Language
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no
- Robots meta
- Manifest
- https://opensensemap.org/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- CDN provider
- —
- IP address
- 128.176.196.25
- ASN
- AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- opensensemap.org
- Valid from
- Jul 3, 2026
- Valid to
- Oct 1, 2026
- Days until expiry
- 66
- SAN domains
- opensensemap.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
10 internal · 1 external · 2 broken
Images
1 total · 1 missing alt
Scripts / Styles
5 scripts · 2 stylesheets
JS / CSS size
1.8 MB · 298 KB
Page size
13.6 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
- Missing <html lang> attribute
Scan details
- Requested URL
- https://opensensemap.org
- Final URL
- https://opensensemap.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 255 ms
- HTML size
- 13.6 KB
- Redirect chain
- https://opensensemap.org
See something wrong on this report? Request a correction
Related websites
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Frequently asked questions
- What technology does opensensemap.org use?
- We did not detect any specific technologies for opensensemap.org in the latest scan.
- Is opensensemap.org secure (HTTPS)?
- Yes. opensensemap.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 1, 2026.
- Who hosts opensensemap.org?
- opensensemap.org is hosted on DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE.
- What is opensensemap.org's SEO score?
- opensensemap.org scored 65/100 for SEO in the latest analysis (fair).
- What is opensensemap.org's overall website score?
- opensensemap.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card