explainthatstuff.com
Explain that Stuff
Last scanned Jul 26, 2026, 5:47 AM · 1 view
Overall score
Excellent
Summary
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!. This website uses PHP. SEO is excellent (90/100) and accessibility is excellent (90/100). Security scores good (85/100) and performance excellent (100/100). Top issue: robots.txt not found.
Explain that Stuff
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
- Garfield House, Garfield Lane, Swanage, Dorset, BH, BH19 3HJ, United Kingdom
Top issues to fix
6 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
Missing html lang attribute
AccessibilitySet <html lang="…"> so screen readers pick the right pronunciation rules.
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
752 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Explain that Stuff
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
Contact
Email, phone, and address published on this site's own pages.
- Address
- Garfield House, Garfield Lane, Swanage, Dorset, BH, BH19 3HJ, United Kingdom
Meta tags
- Title
- Explain that Stuff
- Description
- A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
- Canonical
- https://www.explainthatstuff.com/
- Language
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- max-image-preview:large
- Manifest
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 1.2
- Issuer
- Let's Encrypt
- Subject
- explainthatstuff.com
- Valid from
- Jun 28, 2026
- Valid to
- Sep 26, 2026
- Days until expiry
- 59
- SAN domains
- explainthatstuff.com, mail.explainthatstuff.com, www.explainthatstuff.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 11 · H3 33
Links
45 internal · 8 external · 20 broken
Images
38 total · 0 missing alt
Scripts / Styles
2 scripts · 0 stylesheets
JS / CSS size
0 B · 12.2 KB
Page size
54.3 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
- Missing <html lang> attribute
Scan details
- Requested URL
- https://explainthatstuff.com
- Final URL
- https://www.explainthatstuff.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 751 ms
- HTML size
- 54.3 KB
- Redirect chain
- https://explainthatstuff.com → http://www.explainthatstuff.com/ → https://www.explainthatstuff.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does explainthatstuff.com use?
- explainthatstuff.com is built with PHP, Apache.
- Is explainthatstuff.com secure (HTTPS)?
- Yes. explainthatstuff.com uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 26, 2026.
- Who hosts explainthatstuff.com?
- Hosting provider information for explainthatstuff.com is not available yet.
- What is explainthatstuff.com's SEO score?
- explainthatstuff.com scored 90/100 for SEO in the latest analysis (excellent).
- What is explainthatstuff.com's overall website score?
- explainthatstuff.com has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
- What company operates explainthatstuff.com?
- explainthatstuff.com is operated by Explain that Stuff. A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
OpenGraph & Twitter Card
OpenGraph
Twitter Card