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scrimba.com

https://scrimba.com· First analyzed 04 May 2026· Updated 04 May 2026
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scrimba.com
Desktop screenshot of scrimba.com
Mobile screenshot of scrimba.com
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.22.196

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

lakas.ns.cloudflare.com.mona.ns.cloudflare.com.

Performance

79

Core Web Vitals

Weight

First Contentful Paint
2.4 s10%
Speed Index
3.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.3 MB
38 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Progressive Web App

Web Manifest

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

B70/100
22
6
0
Meta Tags8/15
Content9/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images3/7
Links3/5
URL5/5
Social3/5
Freshness4/4
Mobile4/4
Indexability3/3
S
scrimba.comscrimba.com

Home

Scrimba is the fast way of learning to code! Our interactive courses and tutorials will teach you React, Vue, Angular, Web Development, Node.JS, JavaScript, ...

Description truncated.
Title Length4 chars

Recommended: 50-60 chars (~27px / 580px)

Description Length177 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    3,671 URLs

    robots.txt

    2 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 1

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

    Sponsored

    AI & LLM Readiness

    D55/100
    Bot Access
    20/25
    Machine Read.
    15/25
    Schema Data
    2/25
    Citation
    18/25

    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.txtinvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:4%
    Words:803
    Token eff.:Optimal
    Sections/1K:2.5

    Structured Data

    1 JSON-LD
    Organization×1.1

    Citation Readiness

    Opening Summary36w
    Descriptive Headingsavg 8w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    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.
    B
    71/100
    10
    Passed
    4
    Critical
    0
    Warnings
    Images & Alt Text
    13/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    13/20
    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.
    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.
    73/100
    B
    134 mg
    CO₂e / view
    1.3 MB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    153 mg
    vs
    Returning (cached)
    77 mg
    Annual (10K/mo)
    16.1 kg
    Emission Segments
    Data Center
    7 mg
    Network
    39 mg
    Device
    88 mg
    Resource Breakdown
    JavaScript
    918.3 KB
    Images
    60.4 KB
    CSS
    109.1 KB
    Fonts
    2.0 KB
    HTML
    2.4 KB
    Other
    234.1 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    2 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    32%Critical
    Interactive

    HTTPS

    WAF

    66d

    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

    11.04.2026

    Valid Until

    10.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    scrimba.comassets.scrimba.com

    SHA-256 Fingerprint

    E4:48:99:2B:81:5A:A9:D9:62:5E:C2:7F:8E:E0:79:A5:B8:8C:47:E1...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    cache-control
    🟡 0s(private, max-age=0)
    cf-cache-status
    DYNAMIC
    cf-ray🇮🇹 Milan
    9f6936944a29db95-MXP
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    100

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (5)

    alt2.aspmx.l.google.com
    aspmx2.googlemail.com
    alt1.aspmx.l.google.com
    aspmx3.googlemail.com

    +1 more

    Domain Information

    scrimba.com

    Domain Age
    9y 8m

    Created

    28.08.2016

    Expires

    28.08.2032

    Last Updated

    30.07.2023

    Registrar

    Cloudflare, Inc.

    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.
    C
    62/100
    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, viewport-fit=cover
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    system-ui

    WCAG Fail
    69/100
    Readability
    /30
    18/30

    14px · LH 1.57

    Hierarchy
    /20
    20/20

    2.57x ratio · ✓ H1→H6

    WCAG
    /25
    13/25

    1:1 min contrast

    Performance
    /25
    18/25

    0 fonts · 2 req

    Heading Font

    system-ui

    Sans36px

    Body Font

    system-ui

    Sans14px

    Contrast Ratio

    1:1

    48 issues

    Reading Comfort

    Single Font Family

    left aligned
    36px
    h1
    24px
    h2
    14px
    p

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

    ✅ Optimal line spacing: 1.57 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

    ❌ Low contrast: 48 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

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

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

    GGoogle FontsFluid TypeFlesch 48

    Color Palette

    3 unique colors
    Light
    #161a1d
    Primary· 79.5%
    #232f3f
    Secondary· 16.1%
    #4d5c6c
    Secondary· 4.5%

    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

    8 Resources

    5
    Scripts
    3
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    local(5)

    Website Identity

    Learn to code with Scrimba

    LearningResource

    Scrimba is the fast way of learning to code! Our interactive courses and tutorials will teach you React, Vue, Angular, Web Development, Node.JS, JavaScript, HTML, CSS, and more.

    9 years old
    Location detected: 🇨🇦 Canadavia ip
    Cloudflare, Inc.📧 Google Workspaceen

    Sponsored

    Last analyzed: 04 May 2026 at 17:27

    Historical Analysis & Change Tracking