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carpentries.org

https://carpentries.org· First analyzed 08 May 2026· Updated 08 May 2026
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carpentries.org
Desktop screenshot of carpentries.org
Mobile screenshot of carpentries.org
Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

13.33.235.118

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns-1367.awsdns-42.org.ns-1571.awsdns-04.co.uk.ns-378.awsdns-47.com.ns-889.awsdns-47.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
581 ms10%
Speed Index
755 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
6 MB
40 requests
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Hugov0.139.2
Styling
Tailwind CSS
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

7 Technologies Detected

Libraries

2
jQueryv3.7.1
Moment.js

Frameworks

1
Alpine.js

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Matomo

SEO Analysis

C60/100
16
11
0
Meta Tags7/15
Content8/12
Headings7/8
Technical12/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social3/5
Freshness4/4
Mobile4/4
Indexability3/3
C
carpentries.orgcarpentries.org

The Carpentries

The Carpentries is a registered 501(c)3 non-profit organisation based in Delaware, USA. We are a global community teaching foundational computational and dat...

Description truncated.
Title Length15 chars

Recommended: 50-60 chars (~90px / 580px)

Description Length227 chars

Recommended: 120-160 chars

Issues (0)

    11 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    3,995 URLs

    robots.txt

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 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

    D45/100
    Bot Access
    20/25
    Machine Read.
    11/25
    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
    header/footer
    Text ratio:8%
    Words:396
    Token eff.:Optimal
    Sections/1K:12.6
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary37w
    Descriptive Headingsavg 4.8w
    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.
    C
    68/100
    10
    Passed
    3
    Critical
    1
    Warnings
    Images & Alt Text
    10/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    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
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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.
    27/100
    F
    620 mg
    CO₂e / view
    6.0 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    709 mg
    vs
    Returning (cached)
    354 mg
    Annual (10K/mo)
    74.4 kg
    Emission Segments
    Data Center
    30 mg
    Network
    182 mg
    Device
    408 mg
    Resource Breakdown
    JavaScript
    72.3 KB
    Images
    2.4 MB
    CSS
    3.5 MB
    Fonts
    913 B
    HTML
    31.1 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    98%Excellent
    Static / Informational

    HTTPS

    WAF

    119d

    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

    08.08.2025

    Valid Until

    04.09.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.carpentries.orgcarpentries.org

    SHA-256 Fingerprint

    9E:2F:35:59:CE:D2:73:EF:F2:A0:F3:DA:B2:41:B0:EA:A3:72:F6:32...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    7107
    content-length
    31562
    content-security-policy
    default-src https: 'unsafe-eval' 'unsafe-inline'; object-src...
    content-type
    text/html
    date
    Fri, 08 May 2026 07:12:33 GMT
    etag
    "a9f9c5abecb731456d7d47c946e51d84"
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (5)

    alt2.aspmx.l.google.com
    alt3.aspmx.l.google.com
    alt1.aspmx.l.google.com
    aspmx.l.google.com

    +1 more

    Domain Information

    carpentries.org

    Domain Age
    10y 6m

    Created

    11.11.2015

    Expires

    11.11.2029

    Last Updated

    06.05.2026

    Registrar

    Amazon Registrar, 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.
    D
    56/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans

    WCAG Partial
    75/100
    Readability
    /30
    25/30

    18px · LH 1.56

    Hierarchy
    /20
    14/20

    2.33x ratio

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    20/25

    2 fonts · 1 req

    Heading Font

    Open Sans

    Sans42px

    Body Font

    Open Sans

    Sans18px

    Contrast Ratio

    1:1

    2 issues

    Reading Comfort

    ~38 CPL

    Narrow lines
    42px
    h1
    28px
    h2
    14px
    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).

    ⚠️ Hard to read: Flesch score 37/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 2.3x larger than body text.

    GGoogle FontsBuy on MyFontsFlesch 37

    Color Palette

    11 unique colors
    Light
    #817b7a
    Other· 13.5%
    #e5f1ff
    Background· 16.5%
    #010104
    Primary· 15.7%
    #fbf8f5
    Primary· 12.4%
    #6f5c52
    Secondary· 7%
    #0e3264
    Accent· 6.9%
    #5c341e
    Accent· 6.2%
    #170d0c
    Secondary· 5.7%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Matomo (Piwik)Mid-Market
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    13 Resources

    9
    Scripts
    4
    Styles
    1
    Async
    2
    Defer

    Top Script Sources

    cdn.jsdelivr.net(3)cdn.datatables.net(2)matomo.carpentries.org(1)kit.fontawesome.com(1)code.jquery.com(1)

    Website Identity

    carpentries.org

    10 years old
    Location detected: 🇺🇸 United Statesvia ip
    Amazon Registrar, Inc.📧 Google Workspaceen-us

    Social Profiles

    LinkedInGitHubBluesky

    Sponsored

    Last analyzed: 08 May 2026 at 09:11

    Historical Analysis & Change Tracking

    carpentries.org Technology Stack - Built With Alpine.js, jQuery, Moment.js, Tailwind CSS, Font Awesome | StackOptic | StackOptic