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astro-pi.org

https://astro-pi.org· First analyzed 28 May 2026· Updated 28 May 2026
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astro-pi.org
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Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.26.9.139

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

april.ns.cloudflare.com.tony.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
564 ms10%
Speed Index
733 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
170 KB
38 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Headless
⚙️ SSR
Decoupled
API
Data Source
Headless CMS
Contentful
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Detected API Sources

https://images.ctfassets.net/y...https://images.ctfassets.net/y...

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Hotjar

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Payments

1
Stripe

CDN

1
Cloudflare

SEO Analysis

C63/100
16
9
0
Meta Tags12/15
Content10/12
Headings8/8
Technical10/21
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
A
astro-pi.orgastro-pi.org

Astro Pi | A free challenge where kids run their code in space

The European Astro Pi Challenge is an ESA Education project run in collaboration with the Raspberry Pi Foundation. It offers young people the amazing opportu...

Description truncated.
Title Length62 chars

Recommended: 50-60 chars (~371px / 580px)

Description Length314 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    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

    F28/100
    Bot Access
    20/25
    Machine Read.
    1/25
    Schema Data
    0/25
    Citation
    7/25

    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:10%
    Words:3,669
    Token eff.:Poor Structure

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary1058w
    Descriptive Headings
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    AI readiness recommendation preview...
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    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
    86/100
    14
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    15/20
    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
    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
    15/15
    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.
    1 recommendation
    • •Accessibility recommendation preview...
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    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.
    79/100
    A+
    17 mg
    CO₂e / view
    169.7 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    20 mg
    vs
    Returning (cached)
    10 mg
    Annual (10K/mo)
    2.1 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    5 mg
    Device
    11 mg
    Resource Breakdown
    JavaScript
    49.4 KB
    Images
    46.3 KB
    CSS
    9.8 KB
    Fonts
    58.0 KB
    HTML
    6.3 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    5%Critical
    Critical / Transactional

    HTTPS

    WAF

    76d

    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

    15.05.2026

    Valid Until

    13.08.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (3)

    astro-pi.orgmz-25-26-mozaic.astro-pi.org*.mz-25-26-mozaic.astro-pi.org

    SHA-256 Fingerprint

    69:07:A8:35:EC:91:AE:D2:0D:EE:BC:92:59:3C:88:F5:F8:BB:9A:6E...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 0s(max-age=0, private, must-revalidate)
    cf-cache-status
    DYNAMIC
    cf-ray🇩🇪 Frankfurt
    a02d8974e8189738-FRA
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=utf-8
    date
    Thu, 28 May 2026 13:16:59 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    95

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (3)

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

    Domain Information

    astro-pi.org

    Domain Age
    11y 7m

    Created

    07.10.2014

    Expires

    07.10.2029

    Last Updated

    14.09.2023

    Registrar

    Tucows Domains Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    Legitimate interest basis 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
    77/100
    Mobile Friendly24 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
    2 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Rubik

    WCAG Partial
    78/100
    Readability
    /30
    25/30

    20px · LH 1.40

    Hierarchy
    /20
    17/20

    2.07x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    20/25

    2 fonts · 3 req

    Heading Font

    Rubik

    Sans41px

    Body Font

    Rubik

    Sans20px

    Contrast Ratio

    1:1

    7 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    41px
    h1
    41px
    h2
    29px
    h3
    20px
    p

    ✅ Excellent readability: 20px body text is ideal for all devices.

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

    ⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 2.1x larger than body text.

    ⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

    GGoogle FontsFluid TypeFlesch 62

    Color Palette

    4 unique colors
    3.86:1 AA Large Light
    #ffffff
    Background· 29.9%
    #808284
    Other· 2.5%
    #020307
    Primary· 50.50000000000001%
    #12181b
    Secondary· 17.1%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    6 Resources

    3
    Scripts
    3
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    consent.cookiebot.com(2)local(1)

    Website Identity

    astro-pi.org

    11 years old
    Location detected: 🇨🇦 Canadavia ip
    Tucows Domains Inc.📧 Google Workspaceen

    Sponsored

    Last analyzed: 28 May 2026 at 13:17

    Historical Analysis & Change Tracking