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masteringemacs.org

https://masteringemacs.org· First analyzed 19 May 2026· Updated 19 May 2026
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masteringemacs.org
Desktop screenshot of masteringemacs.org
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Mobile

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Hosting Provider

Linode (Akamai)
linode.com

IP Address

178.79.153.72

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 London, United Kingdom

ASN

AS63949

Organization

Linode, LLC

Server

Nginx

Nameservers

ns4.linode.com.ns3.linode.com.ns2.linode.com.ns1.linode.com.+1 more

Performance

97

Core Web Vitals

Weight

First Contentful Paint
975 ms10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.8 MB
22 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Linode (Akamai)

Technology Stack

10 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

Fonts

2
Adobe Fonts (Typekit)Adobe Fonts

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Email Marketing

1
Mailchimp

Web Servers

1
Nginx

SEO Analysis

D54/100
16
8
2
Meta Tags4/15
Content10/12
Headings8/8
Technical15/25
E-E-A-T0/7
Images2/7
Links3/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
M
masteringemacs.orgmasteringemacs.org

Mastering Emacs

No description available for this page.

Title Length15 chars

Recommended: 50-60 chars (~96px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (7/8) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

113 URLs

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

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

Sponsored

AI & LLM Readiness

D43/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
0/25
Citation
11/25

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 blocksnav
Text ratio:22%
Words:808
Token eff.:Optimal
Sections/1K:13.6
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary27w
Descriptive Headingsavg 5.9w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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.
D
55/100
9
Passed
4
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
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
6/15
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.
35/100
F
398 mg
CO₂e / view
3.8 MB
Page Weight
15%
Cleaner Than
New Visitor
455 mg
vs
Returning (cached)
227 mg
Annual (10K/mo)
47.7 kg
Emission Segments
Data Center
20 mg
Network
117 mg
Device
262 mg
Resource Breakdown
JavaScript
94.7 KB
Images
1.0 MB
CSS
2.7 MB
HTML
7.0 KB
Green Hosting Verified
Linode (Akamai)
Provider Match
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

70d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

ZeroSSL GmbH

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

29.04.2026

Valid Until

28.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (6)

masteringemacs.orgmasteringemacs.commasteringemacs.netwww.masteringemacs.comwww.masteringemacs.netwww.masteringemacs.org

SHA-256 Fingerprint

6C:24:0D:58:84:24:7B:68:B4:FA:36:0E:84:58:F2:44:EB:B1:63:45...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Tue, 19 May 2026 13:43:08 GMT
server
nginx
strict-transport-security
max-age=15768000
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

semantical.co.uk

Domain Information

masteringemacs.org

Domain Age
15y 7m

Created

26.09.2010

Expires

26.09.2026

Last Updated

09.09.2025

Registrar

Name.com, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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.
B
73/100
Mobile Friendly1 breakpoint
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.
Viewport
width=device-width, initial-scale=1.0

Typography & Readability

magister + transat-text

WCAG Partial
70/100
Readability
/30
23/30

24px · LH 1.33

Hierarchy
/20
13/20

2.5x ratio · ✓ H1→H6

WCAG
/25
18/25

1.1:1 min contrast

Performance
/25
16/25

2 fonts

Heading Font

magister

Sans60px

Body Font

transat-text

Sans24px

Contrast Ratio

1.1:1

2 issues

Reading Comfort

~38 CPL

Narrow lines
60px
h1
48px
h2
30px
h3
24px
p

✅ Excellent readability: 24px body text is ideal for all devices.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.1:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

AAdobe FontsBuy on MyFontsVariable FontsFlesch 58

Color Palette

9 unique colors
2.06:1 Fail Light
#ffffff
Text· 81.80000000000001%
#b5b5ae
Other· 2%
#920000
Primary· 6.3%
#ddd0bc
Secondary· 3.3%
#ae7978
Secondary· 2%
#7f1d25
Accent· 1.4%
#f1ebe3
Primary· 1.2%
#277aa6
Accent· 1.1%

Business & Marketing Stack

4 Tools Detected

Advanced

Marketing Automation

1
MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

2

Categories

4

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

9 Resources

7
Scripts
2
Styles
4
Async
0
Defer

Top Script Sources

local(3)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)

Website Identity

masteringemacs.org

15 years old
Location detected: 🇬🇧 United Kingdomvia ip
Name.com, Inc.en

Sponsored

Last analyzed: 19 May 2026 at 13:43

Historical Analysis & Change Tracking