esawebb.org website report
ESA/Webb
Last scanned
Overall score
Fair
About esawebb.org
esawebb.org is a website. It describes itself as “The ESA page for the James Webb Space Telescope, the space-based observatory that has revolutionised modern astronomy”. The site is hosted on Cloudflare. It is also on Facebook, X and Instagram.
Score profile
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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+4 more issues — details in the sections below.
Technology stack
esawebb.org is built with Cloudflare Analytics, Google Analytics and Meta Pixel.
Analytics (2)
Advertising (1)
Hosting & DNS
esawebb.org is hosted on and delivered through Cloudflare (servers registered in US).
- IP address
- 172.67.202.17
- ASN
- AS13335 · CLOUDFLARENET - Cloudflare, Inc., US
- IPv6
- Supported
- HTTP
- HTTP/2
Show DNS record values
- A
- 172.67.202.17, 104.21.76.231
- AAAA
- 2606:4700:3034::6815:4ce7, 2606:4700:3035::ac43:ca11
- MX
- mxa.mailgun.org, alt1.aspmx.l.google.com, aspmx.l.google.com, alt3.aspmx.l.google.com, mxb.mailgun.org, alt4.aspmx.l.google.com, alt2.aspmx.l.google.com
- NS
- luciane.ns.cloudflare.com, aldo.ns.cloudflare.com
TXT record contents are not republished; only their count is shown.
Security
esawebb.org uses TLS 1.3 with a certificate valid for 58 more days and sets 0 of 6 recommended security headers.
Security headers0 of 6 set
- HSTSForces HTTPS
- CSPBlocks injected scripts
- X-Frame-OptionsStops clickjacking
- X-Content-TypeStops MIME sniffing
- Referrer-PolicyLimits URL leakage
- Permissions-PolicyRestricts browser features
TLS certificate
- Names covered
- 2
- Cookies set
- 0
Email security
esawebb.org scores D for email security, with SPF and DMARC policy “none”.
- SPFWeak
Marks unlisted senders as suspicious (~all) but does not reject them.
- DMARCWeak
Monitoring only: forged mail is still delivered.
- MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
- BIMINot set
Not published (optional).
Mail services authorised in SPF: Google WorkspaceMailgun
Performance & carbon
esawebb.org scores 100/100 for performance, with an estimated load time of 0.2 s. A visit emits an estimated 0.40 g of CO2 (grade C).
Page weight
- HTML 78.1 KB
- JavaScript 757 KB
- CSS 246 KB
- Est. load
- 203 ms
- Response
- 202 ms
- Scripts / CSS
- 12 / 4
Carbon per visitC
0.40 g CO2 per uncached view
Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.
SEO & accessibility
esawebb.org scores 55/100 for SEO and 90/100 for accessibility, with 6 SEO issues to fix.
Heading structure
No H1 found.
Image alt text
24 images · 0 without alt text · 0 lazy-loaded
Links
- Internal 92
- External 12
SEO issues6
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues1
- No H1 heading found
Technical details
Page metadata, social tags, crawl files and scan information.
Meta tags
- Title
- ESA/Webb
- Description
- Canonical
- Language
- en
- Robots meta
Crawl files
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
Structured data
No JSON-LD types declared.
- Microdata items
- 0
- RDFa items
- 0
Scan
- Final URL
- https://esawebb.org
- HTTP status
- 200
- Redirects
- https://esawebb.org
- Scanned
- Aug 24, 2026, 1:23 PM
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<a href="https://sitegraph.tech/site/esawebb-org"><img src="https://sitegraph.tech/badge/esawebb-org.svg" alt="esawebb.org on SiteGraph" width="190" height="20" /></a>See something wrong on this report? Request a correction or ask for something to be removed.
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Frequently asked questions about esawebb.org
- What is esawebb.org?
- esawebb.org is a website. It describes itself as “The ESA page for the James Webb Space Telescope, the space-based observatory that has revolutionised modern astronomy”. The site is hosted on Cloudflare. It is also on Facebook, X and Instagram.
- What technology does esawebb.org use?
- esawebb.org is built with Cloudflare Analytics, Google Analytics and Meta Pixel.
- Who hosts esawebb.org?
- esawebb.org is hosted on and delivered through Cloudflare (servers registered in US).
- Is esawebb.org secure?
- esawebb.org uses TLS 1.3 with a certificate valid for 58 more days and sets 0 of 6 recommended security headers.
- Is esawebb.org protected against email spoofing?
- esawebb.org scores D for email security, with SPF and DMARC policy “none”.
- What is esawebb.org's overall score?
- esawebb.org has an overall SiteGraph score of 76/100, combining SEO (55), performance (100), security (65) and accessibility (90).
Open Graph & Twitter