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ubuntulinux.org

https://ubuntulinux.org· First analyzed 29 Apr 2026· Updated 29 Apr 2026
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ubuntulinux.org
Desktop screenshot of ubuntulinux.org
Mobile screenshot of ubuntulinux.org
Mobile

Sponsored

Hosting Provider

Canonical Group Limited

IP Address

185.125.190.21

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 City of London, United Kingdom

ASN

AS41231

Organization

Canonical Group Limited

Server

Nginx

Nameservers

ns3.canonical.com.ns2.canonical.com.ns1.canonical.com.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
725 ms10%
Speed Index
942 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
347 KB
50 requests

Image Optimization

Lazy LoadResponsiveCloudinary
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Canonical Group Limited
CDN
Cloudinary

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

8 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Advertising

2
Google AdsGoogle AdSense

Other

1
lazysizes

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginxv1.14.0

SEO Analysis

B77/100
23
5
0
Meta Tags14/15
Content11/12
Headings6/8
Technical18/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness2/4
Mobile4/4
Indexability3/3
U
ubuntulinux.orgubuntulinux.org

Enterprise Open Source and Linux | Ubuntu

Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.

Title Length45 chars

Recommended: 50-60 chars (~275px / 580px)

Description Length124 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    15 URLs

    15 sub-sitemaps

    robots.txt

    187 rules

    Sitemap reference found

    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.

    Sponsored

    AI & LLM Readiness

    D40/100
    Bot Access
    13/25
    Machine Read.
    11/25
    Schema Data
    0/25
    Citation
    16/25

    AI Bot Access

    7/14 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
    nav
    Text ratio:6%
    Words:2,843
    Token eff.:Optimal
    Sections/1K:4.2
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary16w
    Descriptive Headingsavg 5.3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    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.
    A
    85/100
    14
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    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
    12/15
    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
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    8/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    57/100
    A
    43 mg
    CO₂e / view
    346.6 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    49 mg
    vs
    Returning (cached)
    25 mg
    Annual (10K/mo)
    5.1 kg
    Emission Segments
    Data Center
    10 mg
    Network
    10 mg
    Device
    23 mg
    Resource Breakdown
    JavaScript
    117.8 KB
    Images
    52.2 KB
    CSS
    134.6 KB
    HTML
    33.6 KB
    Other
    8.5 KB
    Green Hosting Not Verified
    Canonical Group Limited
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    85%Very Good
    Interactive

    HTTPS

    No WAF

    77d

    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

    17.04.2026

    Valid Until

    16.07.2026

    Subject Alternative Names (2)

    ubuntu.comwww.ubuntu.com

    SHA-256 Fingerprint

    F3:A9:0C:73:28:56:8D:1E:03:2C:02:02:B5:ED:49:C9:A5:32:7E:66...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    cache-control
    🟡 60s(max-age=60, stale-while-revalidate=86400, stale-if-error=300)
    content-encoding
    zstd
    content-length
    34139
    content-security-policy
    default-src 'self'; img-src data: blob: *; script-src-elem '...
    content-type
    text/html; charset=utf-8
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    50

    SPF
    DKIM
    DMARC

    MX Records (1)

    mx.ubuntu.com

    Domain Information

    ubuntulinux.org

    Domain Age
    21y 11m

    Created

    11.05.2004

    Expires

    11.05.2028

    Last Updated

    14.04.2026

    Registrar

    MarkMonitor Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    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.
    A
    84/100
    Mobile Friendly45 breakpoints
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Ubuntu

    WCAG Partial
    70/100
    Readability
    /30
    25/30

    18px · LH 1.50

    Hierarchy
    /20
    18/20

    2.5x ratio · ✓ H1→H6

    WCAG
    /25
    14/25

    1:1 min contrast

    Performance
    /25
    13/25

    2 fonts · 4 req

    Heading Font

    Ubuntu

    Sans45px

    Body Font

    Ubuntu

    Sans18px

    Contrast Ratio

    1:1

    36 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    45px
    h1
    45px
    h2
    18px
    h3
    27px
    h4
    18px
    p

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 36 elements below WCAG AA threshold (min 1.0:1).

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

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

    Buy on MyFontsFlesch 20

    Color Palette

    6 unique colors
    6.68:1 AA Dark
    #262626
    Other· 87.10000000000001%
    #a7aea9
    Other· 2.5%
    #f3f3f0
    Primary· 2.6%

    Business & Marketing Stack

    3 Tools Detected

    Enterprise

    Marketing Automation

    1
    MarketoEnterprise

    Email marketing and automation platforms

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    2

    Categories

    3

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Ad Networks

    Google AdSense

    Sponsored

    Scripts & Styles

    17 Resources

    14
    Scripts
    3
    Styles
    7
    Async
    4
    Defer

    Top Script Sources

    googletagmanager.com(7)local(6)assets.ubuntu.com(1)

    Website Identity

    ubuntulinux.org

    21 years old
    Location detected: 🇬🇧 United Kingdomvia ip
    MarkMonitor Inc.en

    Sponsored

    Last analyzed: 29 Apr 2026 at 22:41

    Historical Analysis & Change Tracking