StackOptic
Back to Search
mooc.org favicon

mooc.org

https://mooc.org· First analyzed 03 May 2026· Updated 03 May 2026
Export
mooc.org
Desktop screenshot of mooc.org
Mobile screenshot of mooc.org
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.164.68.66

Site Location

🇺🇸 United Statesvia schema_nap

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-958.awsdns-55.net.ns-1330.awsdns-38.org.ns-1608.awsdns-09.co.uk.ns-242.awsdns-30.com.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.3 MB
173 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

JAMstack
🔀 Hybrid
Decoupled
Frontend
Framework
Next.js
Styling
Tailwind CSS
API
Data Source
Headless CMS
Contentful
Infrastructure
Platform
AWS CloudFront
CDN
Cloudflare

Detected API Sources

https://images.ctfassets.net/i...https://images.ctfassets.net/i...

Technology Stack

11 Technologies Detected

Frameworks

3
React
Angular
Alpine.js

Analytics

3
Google Analytics
Google Analytics 4
Segment

Meta Frameworks

1
Next.js

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

SEO Analysis

B76/100
24
6
0
Meta Tags11/15
Content8/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images6/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile1/4
Indexability3/3
M
mooc.orgmooc.org

edX | Online Courses, Certificates & Degrees from Leading Institutions

Find the online learning path for you, delivered by world-class institutions like Harvard, Google, Amazon, and more.

Title Length70 chars

Recommended: 50-60 chars (~417px / 580px)

Description Length116 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    9,475 URLs

    robots.txt

    67 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    30/100
    Needs Work
    8 13

    Sponsored

    AI & LLM Readiness

    D50/100
    Bot Access
    20/25
    Machine Read.
    6/25
    Schema Data
    6/25
    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.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:1%
    Words:7,543
    Token eff.:Excessive

    Structured Data

    3 JSON-LD
    Organization×1.1WebSite
    sameAs entity links

    Citation Readiness

    Opening Summary28w
    Descriptive Headingsavg 6w
    Canonical URL
    Open Graph2/3
    Twitter Card3/3
    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.
    B
    79/100
    12
    Passed
    3
    Critical
    1
    Warnings
    Images & Alt Text
    18/20
    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
    10/15
    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
    9/15
    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.
    40/100
    F
    447 mg
    CO₂e / view
    4.3 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    511 mg
    vs
    Returning (cached)
    256 mg
    Annual (10K/mo)
    53.7 kg
    Emission Segments
    Data Center
    22 mg
    Network
    131 mg
    Device
    294 mg
    Resource Breakdown
    JavaScript
    2.2 MB
    Images
    451.2 KB
    CSS
    559.2 KB
    Fonts
    47.6 KB
    HTML
    507.8 KB
    Other
    594.9 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Interactive

    HTTPS

    WAF

    170d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Amazon

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    21.09.2025

    Valid Until

    20.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    proxy.violet.rveducation.iowww.edx.org

    SHA-256 Fingerprint

    99:08:51:3F:63:80:E2:51:3C:09:C6:0A:B5:72:AF:9C:4A:D7:A6:18...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    55587
    cache-control
    🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)
    cdn-cache-control
    public, max-age=86400, stale-while-revalidate=60, stale-if-e...
    cf-cache-status
    HIT
    cf-ray🇺🇸 Washington DC
    9f5d6d273ca8c990-IAD
    content-encoding
    📦 Gzip(gzip)
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    mooc.org

    Domain Age
    18y 5m

    Created

    13.11.2007

    Expires

    13.11.2026

    Last Updated

    14.10.2025

    Registrar

    Amazon Registrar, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    OneTrust

    Cookie Consent Banner
    OneTrust
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: OneTrust
    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.
    C
    64/100
    Not 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.
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter

    WCAG Partial
    80/100
    Readability
    /30
    25/30

    18px · LH 1.40

    Hierarchy
    /20
    18/20

    3.11x ratio

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    20/25

    1 font · 1 req

    Heading Font

    Inter

    Sans56px

    Body Font

    Inter

    Sans18px

    Contrast Ratio

    1:1

    10 issues

    Reading Comfort

    ~33 CPL

    Narrow lines
    56px
    h1
    72px
    h2
    41px
    h3
    24px
    h4
    18px
    p

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

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 21/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 3.1x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 21

    Color Palette

    7 unique colors
    20.87:1 AAA Dark
    #010101
    Text· 41.199999999999996%
    #ffffff
    Background· 27.299999999999997%
    #2c020e
    Primary· 11.9%
    #6f858a
    Secondary· 5.8%
    #78300f
    Accent· 4.7%
    #7cccdb
    Accent· 4.6%
    #27221e
    Secondary· 4.5%

    Business & Marketing Stack

    4 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    SegmentEnterprise
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    OneTrustEnterprise

    Cookie consent and privacy compliance tools

    2

    Categories

    4

    Total Tools

    2

    Enterprise

    0

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    28 Resources

    18
    Scripts
    10
    Styles
    13
    Async
    1
    Defer

    Top Script Sources

    local(10)sonic-ui.highereducation.com(2)gstatic.com(1)googletagmanager.com(1)cdn.segment.com(1)

    Website Identity

    edX

    edX

    Organization

    Online learning Massive Open Online Course Platform offering courses from leading institutions worldwide

    www.edx.org
    18 years old
    Location detected: 🇺🇸 United Statesvia schema_nap
    Amazon Registrar, Inc.en

    Sponsored

    Last analyzed: 03 May 2026 at 07:07

    Historical Analysis & Change Tracking