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bootstrapcdn.com

https://bootstrapcdn.com· First analyzed 27 Apr 2026· Updated 27 Apr 2026
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bootstrapcdn.com
Desktop screenshot of bootstrapcdn.com
Mobile screenshot of bootstrapcdn.com
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.11.207

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

brenda.ns.cloudflare.com.keenan.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
464 ms10%
Speed Index
603 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
110 KB
22 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
Strapi
Infrastructure
Platform
Render
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

B71/100
19
7
0
Meta Tags13/15
Content6/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
B
bootstrapcdn.combootstrapcdn.com

Official CDN of Bootstrap and Font Awesome · BootstrapCDN

The recommended free CDN for Bootstrap, Font Awesome, Bootswatch and Bootstrap Icons.

Title Length57 chars

Recommended: 50-60 chars (~355px / 580px)

Description Length85 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    9 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    3/100
    Poor
    1 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

    D41/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    14/25

    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:1%
    Words:188
    Token eff.:Too Short
    Sections/1K:5.3
    Depth:2/5

    Structured Data

    Microdata

    Citation Readiness

    Opening Summary25w
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph3/3
    Twitter Card2/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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.
    B
    77/100
    13
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    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
    11/15
    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...
    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.
    74/100
    A+
    11 mg
    CO₂e / view
    109.5 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    13 mg
    vs
    Returning (cached)
    6 mg
    Annual (10K/mo)
    1.3 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    3 mg
    Device
    7 mg
    Resource Breakdown
    JavaScript
    11.2 KB
    Images
    27.5 KB
    CSS
    579 B
    Fonts
    1005 B
    HTML
    34.8 KB
    Other
    34.5 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Interactive

    HTTPS

    WAF

    87d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    25.04.2026

    Valid Until

    24.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    www.bootstrapcdn.com

    SHA-256 Fingerprint

    75:1C:6F:0E:DF:12:2A:79:7C:BC:BC:03:B7:F4:CF:E2:3E:8F:4A:4A...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    675080
    cache-control
    🟡 300s(public, max-age=300)
    cf-cache-status
    HIT
    cf-ray🇩🇪 Frankfurt
    9f30ee6338dc9036-FRA
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    default-src 'self';base-uri 'self';form-action platform.twit...
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    bootstrapcdn.com

    Domain Age
    13y 11m

    Created

    25.05.2012

    Expires

    25.05.2027

    Last Updated

    20.04.2026

    Registrar

    Amazon Registrar, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Privacy policy page linked
    Data Protection Officer mentioned

    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.
    B
    75/100
    Mobile Friendly7 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, shrink-to-fit=no
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter

    WCAG Partial
    82/100
    Readability
    /30
    27/30

    18px · LH 1.56

    Hierarchy
    /20
    20/20

    2.67x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    2.56:1 min contrast

    Performance
    /25
    18/25

    1 font · 1 req

    Heading Font

    Inter

    Sans48px

    Body Font

    Inter

    Sans18px

    Contrast Ratio

    2.56:1

    16 issues

    Reading Comfort

    ~38 CPL

    Narrow lines
    48px
    h1
    32px
    h2
    18px
    p

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

    ✅ Optimal line spacing: 1.56 ratio (ideal range 1.4–1.6).

    ⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 2.6:1).

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

    ✅ Strong hierarchy: Headlines are 2.7x larger than body text.

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

    GGoogle FontsFlesch 58

    Color Palette

    3 unique colors
    Light
    #f3f6fd
    Background· 95.69999999999999%
    #c0c9d6
    Secondary· 2.8%
    #222222
    Primary· 0%
    #5d6175
    Secondary· 1.5%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Social Media

    1
    Twitter/X WidgetsFree

    Social widgets and sharing tools

    2

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    10 Resources

    8
    Scripts
    2
    Styles
    2
    Async
    2
    Defer

    Top Script Sources

    cdn.jsdelivr.net(3)local(2)platform.twitter.com(2)datum.jsdelivr.com(1)

    Website Identity

    bootstrapcdn.com

    13 years old
    Location detected: 🇨🇦 Canadavia ip
    Amazon Registrar, Inc.en

    Social Profiles

    GitHub

    Sponsored

    Last analyzed: 27 Apr 2026 at 21:31

    Historical Analysis & Change Tracking