musictheory.net

https://musictheory.net· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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musictheory.net

Mobile

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Hosting Provider

Linode (Akamai)

linode.com

IP Address

66.175.219.138

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Fremont, United States

ASN

AS63949

Organization

Linode

Server

Nginx

Nameservers

ns5.linode.com.ns2.linode.com.ns4.linode.com.ns1.linode.com.+1 more

Performance

100

Core Web Vitals

Weight

First Contentful Paint

526 ms10%

Speed Index

684 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

153 KB

15 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Linode (Akamai)

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Web Servers

Nginx

SEO Analysis

D41/100

Meta Tags7/15

Content0/12

Headings0/8

Technical14/25

E-E-A-T0/7

Images2/7

Links3/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

musictheory.netmusictheory.net

musictheory.net

Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators.

Title Length15 chars

Recommended: 50-60 chars (~91px / 580px)

Description Length93 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (36 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (4/4) — critical for accessibility and SEO

9 issues found

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Crawlability

Sitemap

robots.txt

12 rules

Local SEO

Local Search Readiness

6/100

Poor

2 13 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

F30/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

6/25

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

navheader/footer

Text ratio:4%

Words:35

Token eff.:Too Short

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph2/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

77/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

12/20

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

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 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.

78/100

A+

15 mg

CO₂e / view

152.8 KB

Page Weight

95%

Cleaner Than

New Visitor

18 mg

Returning (cached)

9 mg

Annual (10K/mo)

1.8 kg

Emission Segments

Data Center

<0.001 g

Network

5 mg

Device

10 mg

Resource Breakdown

JavaScript

9.6 KB

Images

71.4 KB

CSS

54.7 KB

HTML

2.1 KB

Other

15.1 KB

Green Hosting Verified

Linode (Akamai)

Provider Match

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

85%Very Good

Static / Informational

HTTPS

No WAF

56d

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

Valid From

26.03.2026

Valid Until

24.06.2026

Subject Alternative Names (2)

musictheory.netwww.musictheory.net

SHA-256 Fingerprint

95:CC:B3:62:B6:A5:28:65:C0:AC:21:F5:A9:6D:5F:9E:49:EE:90:B3...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, max-age=0,must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Tue, 28 Apr 2026 15:42:03 GMT

etag

W/"6942e19d-1543"

expires

Thu, 01 Jan 1970 00:00:01 GMT

Good Warning Issue

Email Infrastructure

Fastmail

Score

SPF

DKIM

DMARC

MX Records (2)

in1-smtp.messagingengine.com

in2-smtp.messagingengine.com

Domain Information

musictheory.net

Domain Age

26y 4m

Created

31.12.1999

Expires

31.12.2026

Last Updated

26.09.2024

Registrar

DreamHost, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

46/100

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.

Viewport

width=540

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG AAA

56/100

Readability

/30

8/30

13px · LH 0.92

Hierarchy

/20

10/20

WCAG

/25

24/25

21:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Helvetica

Body Font

Helvetica

Sans13px

Contrast Ratio

21:1

WCAG AAA (≥7:1)

Reading Comfort

Single Family

left aligned

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (0.92). Increase to 1.4–1.6 for better readability.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 21.0:1).

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

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

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Color Palette

12 unique colors

20.87:1 AAA Light

#ffffff

Background· 76.89999999999999%

#010101

Text· 3.6%

#c0dbc0

Primary· 0.4%

#ffffe2

Accent· 0.2%

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Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(1)

Website Identity

musictheory.net

26 years old

Location detected: 🇺🇸 United Statesvia ip

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Last analyzed: 28 Apr 2026 at 15:42

Historical Analysis & Change Tracking