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exploringjs.com

https://exploringjs.com· First analyzed 05 May 2026· Updated 05 May 2026
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exploringjs.com
Desktop screenshot of exploringjs.com
Mobile screenshot of exploringjs.com
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

95.217.26.94

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS24940

Organization

Hetzner Online GmbH

Server

statichost.eu

Nameservers

robotns2.second-ns.de.robotns3.second-ns.com.ns1.first-ns.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
560 ms10%
Speed Index
728 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
353 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Hetzner

Technology Stack

1 Technologies Detected

CSS Frameworks

1
Tailwind CSS

SEO Analysis

D51/100
13
8
2
Meta Tags9/15
Content10/12
Headings8/8
Technical5/21
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
E
exploringjs.comexploringjs.com

Exploring JS: JavaScript books for programmers

No description available for this page.

Title Length46 chars

Recommended: 50-60 chars (~282px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

10 issues found

Upgrade to view details

Local SEO

Local Search Readiness

0/100
Poor
15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F32/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
4/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
code blocks
Text ratio:25%
Words:221
Token eff.:Too Short
Sections/1K:22.6
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w
Descriptive Headingsavg 3.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
C
61/100
8
Passed
5
Critical
0
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
76/100
A+
36 mg
CO₂e / view
353.2 KB
Page Weight
90%
Cleaner Than
New Visitor
41 mg
vs
Returning (cached)
20 mg
Annual (10K/mo)
4.3 kg
Emission Segments
Data Center
2 mg
Network
11 mg
Device
23 mg
Resource Breakdown
Images
350.3 KB
CSS
821 B
HTML
2.1 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

81%Very Good
Static / Informational

HTTPS

No WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

26.04.2026

Valid Until

25.07.2026

Subject Alternative Names (1)

exploringjs.com

SHA-256 Fingerprint

D2:6F:52:C7:34:EE:94:F2:15:6A:37:1F:E5:48:F6:1C:54:2B:0D:61...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000
cache-control
🟡 0s(public, max-age=0, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-length
1874
content-type
text/html; charset=utf-8
date
Tue, 05 May 2026 03:32:40 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

exploringjs.com

Domain Age
11y 3m

Created

29.01.2015

Expires

29.01.2027

Last Updated

30.01.2026

Registrar

Hetzner Online GmbH

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
F
33/100
Not Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Palatino

WCAG AAA
82/100
Readability
/30
25/30

21px · LH 1.50

Hierarchy
/20
19/20

2x ratio · ✓ H1→H6

WCAG
/25
24/25

9.83:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Palatino

Serif42px

Body Font

Palatino

Serif21px

Contrast Ratio

9.83:1

WCAG AAA (≥7:1)

Reading Comfort

~32 CPL

Narrow lines
42px
h1
32px
h2
21px
p

✅ Excellent readability: 21px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.8:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 52

Color Palette

9 unique colors
12.29:1 AAA Light
#ffffff
Background· 89.6%
#39333a
Other· 1.7%
#fa9c73
Primary· 1.5%
#d3c7c1
Secondary· 1%
#8ca797
Secondary· 1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

exploringjs.com

11 years old
Location detected: 🇫🇮 Finlandvia ip
Hetzner Online GmbH

Sponsored

Last analyzed: 05 May 2026 at 03:32

Historical Analysis & Change Tracking