cantorion.org

https://cantorion.org· First analyzed 28 May 2026· Updated 28 May 2026

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cantorion.org

Mobile

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Hosting Provider

Heart Internet

heartinternet.uk

IP Address

46.32.254.110

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Leeds, United Kingdom

ASN

AS20738

Organization

GD MASS Network

Server

Apache

Nameservers

ns23.domaincontrol.com.ns24.domaincontrol.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.0 s10%

Speed Index

1.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

449 KB

47 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Heart Internet

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Advertising

Google Ads Google AdSense

Icon Libraries

Font Awesome

Fonts

Google Fonts

Web Servers

Apachev2.4.46

SEO Analysis

C64/100

Meta Tags13/15

Content6/12

Headings7/8

Technical15/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile2/4

Indexability3/3

cantorion.orgcantorion.org

Home - Cantorion - Free sheet music, free scores

Cantorion is a free sheet music repository and a free concert listing diary that anyone can contribute to.

Title Length48 chars

Recommended: 50-60 chars (~296px / 580px)

Description Length106 chars

Recommended: 120-160 chars

Issues (0)

10 issues found

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Crawlability

Sitemap

Type: index

20 URLs

20 sub-sitemaps

robots.txt

44 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

2 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

F36/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

8/25

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:1%

Words:646

Token eff.:Optimal

Sections/1K:1.5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 7w

Canonical URL

Open Graph1/3

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.

62/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

11/20

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

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

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.

68/100

45 mg

CO₂e / view

449.2 KB

Page Weight

90%

Cleaner Than

New Visitor

52 mg

Returning (cached)

26 mg

Annual (10K/mo)

5.4 kg

Emission Segments

Data Center

2 mg

Network

13 mg

Device

30 mg

Resource Breakdown

JavaScript

382.2 KB

Fonts

4.2 KB

HTML

17.2 KB

Other

45.6 KB

Green Hosting Verified

Heart Internet

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

34d

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/1.1

Valid From

02.04.2026

Valid Until

01.07.2026

Subject Alternative Names (20)

ar.cantorion.orgca.cantorion.orgcantorion.orgcantorionnoten.decy.cantorion.orgel.cantorion.orges.cantorion.orgfr.cantorion.org+12 more

SHA-256 Fingerprint

74:43:7E:9D:25:AE:76:40:1A:16:99:9B:A7:C6:8D:59:E4:21:56:BA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔵 3 Days(max-age=259200, must-revalidate)

connection

Upgrade, Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

content-length

17344

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Forward Email

Score

SPF

DKIM

DMARC

MX Records (2)

mx1.forwardemail.net

mx2.forwardemail.net

Domain Information

cantorion.org

Domain Age

18y 1m

Created

06.04.2008

Expires

06.04.2027

Last Updated

21.05.2026

Registrar

Mesh Digital Limited

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

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.

66/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AAA

71/100

Readability

/30

19/30

16px · LH --

Hierarchy

/20

15/20

2x ratio

WCAG

/25

24/25

8.41:1 min contrast

Performance

/25

13/25

1 font · 2 req

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

8.41:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned

32px

19px

16px

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

❌ Very complex text: Flesch score 12/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 8.4:1).

⚠️ 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.

GGoogle Fonts Buy on MyFontsFlesch 12

Color Palette

3 unique colors

Light

#ffffff

Background· 97.39999999999998%

#a1a1b8

Secondary· 1.7%

#007900

Primary· 0%

Business & Marketing Stack

3 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(4)fundingchoicesmessages.google.com(4)cantorion.org(1)cdn3.cantorion.org(1)

Website Identity

cantorion.org

18 years old

Location detected: 🇬🇧 United Kingdomvia ip

Mesh Digital Limited📧 Forward Emailen

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Last analyzed: 28 May 2026 at 02:11

Historical Analysis & Change Tracking