explainthatstuff.com
Scanned URL: https://explainthatstuff.com
85
π SEO Score
11 / 13 checks passed
45
π€ LLM Readiness
5 / 11 checks passed
73
β‘ Performance
8 / 11 checks passed
π Extracted Page Tags
Title Tag
Explain that Stuff
Meta Description
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
H1 Heading
The FREE science and technology book
Canonical URL
https://www.explainthatstuff.com/
π SEO Audit
85/100β Title Tag
Length: 18 chars (Ideal: 30-60).
β
Meta Description
Length: 109 chars (Ideal: 50-160).
β
H1 Tag
Found 1 H1 tags. Exactly 1 is recommended.
β
Canonical URL
Canonical URL is set.
β
Open Graph Tags
Found 6 OG properties (4+ recommended).
β
Indexability
Page allows indexing.
β
Mobile Viewport
Viewport meta tag present.
β
Image Alt Text
0 of 45 images missing alt.
β Sitemap
No sitemap found in robots.txt.
β
Heading Hierarchy
H1 and H2 structure detected.
β
Internal Links
Found 8 internal links.
β
HSTS Security
HSTS header present.
β
HTTPS
Loads securely over HTTPS.
π€ LLMO
45/100β
Structured Data (JSON-LD)
Found 2 JSON-LD blocks.
β
Schema Entities
Types: organization
β FAQ Schema
Missing FAQ schema.
β
Contextual Summary
Description provides good AI context.
β E-E-A-T (Author)
No author meta or schema.
β
Organisation Schema
Business entity defined.
β Breadcrumb Schema
Missing BreadcrumbList.
β
AI Crawler Access
AI agents not blocked.
β Language Declaration
Missing <html> lang attribute.
β Semantic Structure
No semantic HTML5 wrappers.
β Entity Verification Links
No entity validation links.
β‘ Performance
73/100Network Waterfall (Total: 1035ms)
- DNS: 253ms
- Connect: 264ms
- TTFB: 417ms
- Download: 618ms
β
Time to First Byte (TTFB)
TTFB: 417ms (Target: < 600ms).
β
HTML Payload Size
Raw HTML: 16.8KB (Target: < 150KB).
β
Text Compression
Compression enabled (gzip).
β
Cache Policies
Cache-Control headers set.
β CDN Usage
No CDN headers found.
β
Secure Delivery (HTTPS)
Served securely.
β Modern Protocol
Using HTTP/1.1.
β
Native Lazy Loading
Images use loading='lazy'.
β Minified Assets
No minified assets linked.
β
Preload / Preconnect Hints
Resource hints found.
β
Character Set
UTF-8 declared.
π‘οΈ Security & Blacklist
Cleanβ
Domain is clean.
β
Spamhaus DBLVerify β
Lookup inconclusive β use the Verify link to check manually.
β
SURBLVerify β
Not listed β no threats detected.
β
URIBLVerify β
Lookup inconclusive β use the Verify link to check manually.
β
Google Safe BrowsingVerify β
No unsafe content found per Google Safe Browsing.
βοΈ Technologies
E-Commerce
Magento
Infrastructure & CDN
ApachePHP
π WHOIS
Registrar
Tucows Domains Inc.
Registered
2006-04-22
Expires
2027-04-22
Last Updated
2025-07-13
Status
active
Name Servers
ns0.zen.co.uk, ns1.zen.co.uk
π DNS Records
| Type | Value |
|---|---|
| A | 209.142.64.143 |
| MX | mail.explainthatstuff.com |
| TXT | e4ghpe2dvbg4gh9qa34kj3fg2l |
| TXT | v=spf1 +mx +a +ip4:209.142.64.143 ~all |
| NS | ns1.zen.co.uk |
| NS | ns0.zen.co.uk |