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mattmahoney.net

https://mattmahoney.net· First analyzed 16 May 2026· Updated 16 May 2026
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mattmahoney.net
Desktop screenshot of mattmahoney.net
Mobile screenshot of mattmahoney.net
Mobile

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Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

20.119.76.151

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Boydton, United States

ASN

AS8075

Organization

Microsoft Azure Cloud (eastus)

Server

LiteSpeed

Nameservers

ns1.turbify.com.ns2.turbify.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
269 ms10%
Speed Index
350 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
98 KB
2 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Microsoft Azure

Technology Stack

1 Technologies Detected

Web Servers

1
LiteSpeed

SEO Analysis

F39/100
9
12
3
Meta Tags4/15
Content8/12
Headings5/8
Technical4/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
M
mattmahoney.netmattmahoney.net

Matt Mahoney's Home Page

No description available for this page.

Title Length24 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (1/1) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

15 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.

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AI & LLM Readiness

F36/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
5/25

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
Text ratio:61%
Words:341
Token eff.:Optimal
Sections/1K:2.9

Structured Data

No Schema

Citation Readiness

Opening Summary48w
Descriptive Headingsavg 5w
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...
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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.
D
53/100
7
Passed
6
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
8/20
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...
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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.
72/100
A+
10 mg
CO₂e / view
97.6 KB
Page Weight
95%
Cleaner Than
New Visitor
11 mg
vs
Returning (cached)
6 mg
Annual (10K/mo)
1.2 kg
Emission Segments
Data Center
<0.001 g
Network
3 mg
Device
7 mg
Resource Breakdown
Images
95.9 KB
HTML
1.6 KB
Green Hosting Verified
Microsoft Azure
Provider Match
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

67d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

23.04.2026

Valid Until

22.07.2026

Subject Alternative Names (2)

mattmahoney.netwww.mattmahoney.net

SHA-256 Fingerprint

37:A9:93:21:9E:B3:26:20:E5:D6:FC:4E:72:96:0E:F9:F5:5A:17:01...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
alt-svc
h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...
content-encoding
⚡ Brotli(br)
content-length
1381
content-type
text/html
date
Sat, 16 May 2026 00:04:17 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (2)

mx-biz.mail.am0.yahoodns.net
mx-biz.mail.am0.yahoodns.net

Domain Information

mattmahoney.net

Domain Age
23y 8m

Created

29.08.2002

Expires

29.08.2026

Last Updated

31.07.2025

Registrar

Tucows Domains Inc.

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
32/100
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

Times New Roman

WCAG AAA
75/100
Readability
/30
22/30

16px · LH --

Hierarchy
/20
15/20

2x ratio

WCAG
/25
24/25

9.4:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines
32px
h1
19px
h3
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 56

Color Palette

10 unique colors
15.07:1 AAA Light
#ffffff
Background· 65.2%
#29252b
Secondary· 5.7%
#b58881
Primary· 3.4%
#91655b
Secondary· 3.3%

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Website Identity

mattmahoney.net

23 years old
Location detected: 🇺🇸 United Statesvia ip
Tucows Domains Inc.

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Last analyzed: 16 May 2026 at 00:04

Historical Analysis & Change Tracking