javascript.info
Scanned URL: https://javascript.info
69
π SEO Score
9 / 13 checks passed
64
π€ LLM Readiness
7 / 11 checks passed
55
β‘ Performance
6 / 11 checks passed
π Extracted Page Tags
Title Tag
The Modern JavaScript Tutorial
Meta Description
Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.
H1 Heading
The Modern JavaScript Tutorial
Canonical URL
https://javascript.info/
π SEO Audit
69/100β
Title Tag
Length: 30 chars (Ideal: 30-60).
β Meta Description
Length: 166 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 5 OG properties (4+ recommended).
β
Indexability
Page allows indexing.
β
Mobile Viewport
Viewport meta tag present.
β Image Alt Text
4 of 4 images missing alt.
β Sitemap
No sitemap found in robots.txt.
β
Heading Hierarchy
H1 and H2 structure detected.
β
Internal Links
Found 234 internal links.
β HSTS Security
Missing HSTS header.
β
HTTPS
Loads securely over HTTPS.
π€ LLMO
64/100β
Structured Data (JSON-LD)
Found 1 JSON-LD blocks.
β
Schema Entities
Types: website
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
Missing Organization schema.
β Breadcrumb Schema
Missing BreadcrumbList.
β
AI Crawler Access
AI agents not blocked.
β
Language Declaration
Language set to 'en'.
β
Semantic Structure
Uses <main> or <article>.
β
Entity Verification Links
Social/publisher profiles linked.
β‘ Performance
55/100Network Waterfall (Total: 528ms)
- DNS: 125ms
- Connect: 133ms
- TTFB: 408ms
- Download: 120ms
β
Time to First Byte (TTFB)
TTFB: 408ms (Target: < 600ms).
β
HTML Payload Size
Raw HTML: 9.8KB (Target: < 150KB).
β
Text Compression
Compression enabled (gzip).
β Cache Policies
Missing Cache-Control headers.
β
CDN Usage
Edge delivery detected.
β
Secure Delivery (HTTPS)
Served securely.
β Modern Protocol
Using HTTP/1.1.
β Native Lazy Loading
No lazy loading detected.
β Minified Assets
No minified assets linked.
β Preload / Preconnect Hints
Missing preload/preconnect hints.
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
Analytics & Tracking
Google AnalyticsGoogle Tag Manager
Infrastructure & CDN
Cloudflare
π WHOIS
Registrar
Cloudflare, Inc
Expires
2026-09-21
Registered
2001-09-21
Last Updated
2025-08-27
Status
client transfer prohibited
Name Servers
ines.ns.cloudflare.com, damon.ns.cloudflare.com
π DNS Records
| Type | Value |
|---|---|
| A | 104.26.12.17 |
| A | 104.26.13.17 |
| A | 172.67.74.41 |
| MX | alt1.aspmx.l.google.com |
| MX | alt2.aspmx.l.google.com |
| MX | aspmx.l.google.com |
| MX | aspmx2.googlemail.com |
| MX | aspmx3.googlemail.com |
| MX | aspmx4.googlemail.com |
| MX | aspmx5.googlemail.com |
| TXT | google-site-verification=OPB5BvCtqM2C2mOORtOj07XW_sgzSq2aW7r63B5s6yY |
| TXT | v=spf1 include:amazonses.com include:_spf.google.com include:mail.zendesk.com ~all |
| TXT | yandex-verification: 9ecaa357f86ab13e |
| NS | damon.ns.cloudflare.com |
| NS | ines.ns.cloudflare.com |