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teoria.com

https://teoria.com· First analyzed 07 May 2026· Updated 07 May 2026
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teoria.com
Desktop screenshot of teoria.com
Mobile screenshot of teoria.com
Mobile

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Hosting Provider

DigitalOcean
digitalocean.com

IP Address

147.182.174.216

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 North Bergen, United States

ASN

AS14061

Organization

DigitalOcean, LLC

Server

OpenResty

Nameservers

ns23.worldnic.com.ns24.worldnic.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
577 ms10%
Speed Index
750 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
188 KB
20 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
DigitalOcean

Technology Stack

8 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.5.1

Payments

1
PayPal

Web Servers

1
OpenResty

Languages

1
PHPv8.2.24

SEO Analysis

D48/100
11
11
0
Meta Tags7/15
Content9/12
Headings5/8
Technical8/21
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
T
teoria.comteoria.com

teoria : Music Theory Web

Web site dedicated to the study of Music Theory. Articles, reference, interactive exercises.

Title Length25 chars

Recommended: 50-60 chars (~154px / 580px)

Description Length92 chars

Recommended: 120-160 chars

Issues (0)

    11 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

    F28/100
    Bot Access
    20/25
    Machine Read.
    4/25
    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
    def. lists
    Text ratio:14%
    Words:228
    Token eff.:Too Short
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary22w
    Descriptive Headings
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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.
    C
    63/100
    9
    Passed
    6
    Critical
    0
    Warnings
    Images & Alt Text
    10/20
    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
    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.
    66/100
    A+
    19 mg
    CO₂e / view
    187.9 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    22 mg
    vs
    Returning (cached)
    11 mg
    Annual (10K/mo)
    2.3 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    6 mg
    Device
    13 mg
    Resource Breakdown
    JavaScript
    66.2 KB
    Images
    74.6 KB
    CSS
    38.3 KB
    HTML
    3.5 KB
    Other
    5.3 KB
    Green Hosting Verified
    DigitalOcean
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    145d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    15.09.2025

    Valid Until

    29.09.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    teoria.comwww.teoria.com

    SHA-256 Fingerprint

    9D:43:54:A8:68:30:E5:E0:34:43:49:02:AE:C5:2F:59:12:12:DD:8F...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    3294
    content-type
    text/html; charset=UTF-8
    date
    Thu, 07 May 2026 08:56:24 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (2)

    delta.teoria.com
    mail.teoria.com

    Domain Information

    teoria.com

    Domain Age
    28y 1m

    Created

    18.03.1998

    Expires

    17.03.2031

    Last Updated

    16.01.2026

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    Privacy policy page linked

    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.
    D
    59/100
    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...
    Upgrade to view recommendations

    Typography & Readability

    Helvetica Neue

    WCAG Partial
    69/100
    Readability
    /30
    22/30

    14px · LH 1.43

    Hierarchy
    /20
    11/20

    2.57x ratio

    WCAG
    /25
    17/25

    3.53:1 min contrast

    Performance
    /25
    19/25

    System fonts

    Heading Font

    Helvetica Neue

    Sans36px

    Body Font

    Helvetica Neue

    Sans14px

    Contrast Ratio

    3.53:1

    3 issues

    Reading Comfort

    ~41 CPL

    Narrow lines
    36px
    h1
    18px
    h4
    14px
    p

    ⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

    ✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 31/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 3.5:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 2.6x larger than body text.

    Flesch 31

    Color Palette

    5 unique colors
    7.36:1 AAA Light
    #ffffff
    Background· 80.3%
    #595554
    Other· 2.6%
    #f2dedf
    Primary· 9.399999999999999%

    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

    Sponsored

    Scripts & Styles

    7 Resources

    5
    Scripts
    2
    Styles
    2
    Async
    1
    Defer

    Top Script Sources

    res(2)ajax.googleapis.com(1)apis.google.com(1)googletagmanager.com(1)

    Website Identity

    teoria.com

    28 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLC

    Sponsored

    Last analyzed: 07 May 2026 at 08:56

    Historical Analysis & Change Tracking