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boot.dev

https://boot.dev· First analyzed 13 May 2026· Updated 13 May 2026
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boot.dev
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Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.67.70.202

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

will.ns.cloudflare.com.jamie.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
637 ms10%
Speed Index
828 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.9 MB
176 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Nuxt.js
Styling
Tailwind CSS
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Analytics

3
Google Analytics
Facebook PixelPostHog

Fonts

2
Adobe Fonts (Typekit)Adobe Fonts

Meta Frameworks

1
Nuxt.jsv5.0

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

CDN

1
Cloudflare

SEO Analysis

B76/100
24
7
0
Meta Tags9/15
Content8/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images7/7
Links5/5
URL5/5
Social3/5
Freshness2/4
Mobile1/4
Indexability3/3
B
boot.devboot.dev

Learn to Code | Boot.dev

Welcome to the most captivating, finger-flying, addictive way to learn to code. Master backend, devops and data analysis skills online.

Title Length24 chars

Recommended: 50-60 chars (~144px / 580px)

Description Length135 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    91 URLs

    robots.txt

    7 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    10/100
    Poor
    3 13 1

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D59/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    12/25
    Citation
    15/25

    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:2%
    Words:1,067
    Token eff.:Optimal
    Sections/1K:2.8

    Structured Data

    3 JSON-LD
    FAQPage×1.5Person×1.3WebSiteSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary33w
    Descriptive Headingsavg 8.1w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    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.
    A
    81/100
    12
    Passed
    2
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    16/20
    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
    11/15
    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.
    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.
    36/100
    F
    509 mg
    CO₂e / view
    4.9 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    582 mg
    vs
    Returning (cached)
    291 mg
    Annual (10K/mo)
    61.1 kg
    Emission Segments
    Data Center
    25 mg
    Network
    150 mg
    Device
    335 mg
    Resource Breakdown
    JavaScript
    1.1 MB
    Images
    3.4 MB
    CSS
    417.5 KB
    HTML
    56.4 KB
    Other
    675 B
    Green Hosting Verified
    Cloudflare
    GWF Verified
    8 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    WAF

    81d

    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+H3

    Valid From

    04.05.2026

    Valid Until

    02.08.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    www.boot.dev

    SHA-256 Fingerprint

    61:6B:63:B9:F4:75:CF:D6:61:00:62:31:4C:EA:E3:49:E8:16:17:6D...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    cf-cache-status
    DYNAMIC
    cf-ray
    9faf4dd9eaa6d0d2-SOF
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html;charset=utf-8
    date
    Wed, 13 May 2026 05:36:13 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    90

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (5)

    aspmx.l.google.com
    alt4.aspmx.l.google.com
    alt1.aspmx.l.google.com
    alt3.aspmx.l.google.com

    +1 more

    Domain Information

    boot.dev

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    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.
    A
    81/100
    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=1.0

    Typography & Readability

    Arcuata + DMSans

    WCAG AA
    75/100
    Readability
    /30
    22/30

    18px · LH 1.56

    Hierarchy
    /20
    19/20

    2.67x ratio · ✓ H1→H6

    WCAG
    /25
    21/25

    5.66:1 min contrast

    Performance
    /25
    13/25

    2 fonts · 6 req

    Heading Font

    Arcuata

    Sans48px

    Body Font

    DMSans

    Sans18px

    Contrast Ratio

    5.66:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~34 CPL

    Narrow lines
    48px
    h1
    36px
    h2
    36px
    h3
    16px
    h4
    18px
    p

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

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

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.7:1).

    ✅ 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: 2 font families keeps load times fast.

    AAdobe FontsBuy on MyFontsFlesch 58

    Color Palette

    3 unique colors
    Dark
    #615b51
    Secondary· 6.2%
    #1f2330
    Secondary· 88.8%
    #ffffff
    Primary· 0%
    #12141e
    Secondary· 5.1%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Facebook PixelMid-Market

    Ad platforms and retargeting pixels

    Social Media

    1
    Facebook SDKFree

    Social widgets and sharing tools

    3

    Categories

    3

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    19 Resources

    9
    Scripts
    10
    Styles
    3
    Async
    2
    Defer

    Top Script Sources

    us-assets.i.posthog.com(3)connect.facebook.net(2)local(2)googletagmanager.com(1)accounts.google.com(1)

    Website Identity

    Boot.dev

    Boot.dev

    EducationalOrganization

    Welcome to the most captivating, finger-flying, addictive way to learn to code. Master backend, devops and data analysis skills online.

    www.boot.dev
    Location detected: 🇨🇦 Canadavia ip
    📧 Google WorkspaceenEst. 2022

    Sponsored

    Last analyzed: 13 May 2026 at 05:36

    Historical Analysis & Change Tracking