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radiolab.org

https://radiolab.org· First analyzed 23 Apr 2026· Updated 23 Apr 2026
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radiolab.org
Desktop screenshot of radiolab.org
Mobile screenshot of radiolab.org
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.164.68.111

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-1406.awsdns-47.org.ns-1931.awsdns-49.co.uk.ns-3.awsdns-00.com.ns-673.awsdns-20.net.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1 MB
97 requests
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Nuxt.js
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

13 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Sentry

Advertising

3
Google AdsCriteoOutbrain

Meta Frameworks

1
Nuxt.js

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Material Icons

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Payments

1
Square

Web Servers

1
Nginx

SEO Analysis

D59/100
16
7
0
Meta Tags10/15
Content6/12
Headings6/8
Technical14/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
R
radiolab.orgradiolab.org

Radiolab: Podcasts | WNYC Studios | Podcasts

Investigating a strange world.

Title Length44 chars

Recommended: 50-60 chars (~262px / 580px)

Description Length30 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    robots.txt

    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

    F38/100
    Bot Access
    20/25
    Machine Read.
    5/25
    Schema Data
    0/25
    Citation
    13/25

    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:9%
    Words:8,276
    Token eff.:Excessive

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary49w
    Descriptive Headingsavg 4w
    Canonical URL
    Open Graph0/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    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
    75/100
    11
    Passed
    3
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    11/20
    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
    8/15
    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.
    54/100
    B
    104 mg
    CO₂e / view
    1.0 MB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    119 mg
    vs
    Returning (cached)
    60 mg
    Annual (10K/mo)
    12.5 kg
    Emission Segments
    Data Center
    5 mg
    Network
    31 mg
    Device
    69 mg
    Resource Breakdown
    JavaScript
    580.4 KB
    Images
    189.7 KB
    CSS
    223.0 KB
    Fonts
    6.2 KB
    HTML
    9.9 KB
    Other
    23.6 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    305d

    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/1.1

    Valid From

    24.01.2026

    Valid Until

    22.02.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (6)

    radiolab.orgdewey.radiolab.orgwww.radiolab.orgbeta.radiolab.orgapi.radiolab.orgprod.radiolab.org

    SHA-256 Fingerprint

    AF:86:60:95:21:2F:C8:22:67:D3:4C:74:06:A6:F4:8E:84:1D:21:0F...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    225
    connection
    keep-alive
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html;charset=utf-8
    date
    Thu, 23 Apr 2026 03:24:09 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Mailgun

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (2)

    mxa.mailgun.org
    mxb.mailgun.org

    Domain Information

    radiolab.org

    Domain Age
    23y 7m

    Created

    09.09.2002

    Expires

    09.09.2026

    Last Updated

    10.08.2025

    Registrar

    Amazon Registrar, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    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
    79/100
    Mobile Friendly115 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...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans + Matter

    WCAG Partial
    64/100
    Readability
    /30
    14/30

    12px · LH 1.33

    Hierarchy
    /20
    15/20

    1.46x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    1.79:1 min contrast

    Performance
    /25
    18/25

    2 fonts · 5 req

    Heading Font

    Open Sans

    Sans18px

    Body Font

    Matter

    Sans12px

    Contrast Ratio

    1.79:1

    3 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    18px
    h1
    52px
    h2
    26px
    h3
    12px
    p
    Major Sixth
    Scale

    ❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

    ⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

    ⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.8:1).

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

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ✅ Lean font stack: 2 font families keeps load times fast.

    GGoogle Fonts

    Color Palette

    5 unique colors
    6.58:1 AA Dark
    #5c5d61
    Other· 63.1%
    #ffffff
    Background· 20.8%
    #8e9cae
    Secondary· 2.3%
    #125ec3
    Primary· 1.2%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Ad Networks

    Google Ad ManagerMedia.netAmazon Publisher ServicesSovrnPubMaticOpenXIndex ExchangePrebid.js

    Sponsored

    Scripts & Styles

    25 Resources

    15
    Scripts
    10
    Styles
    11
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)pixel.byspotify.com(1)htlbid.com(1)

    Website Identity

    radiolab.org

    23 years old
    Location detected: 🇫🇮 Finlandvia ip
    Amazon Registrar, Inc.📧 Mailgunen

    Sponsored

    Last analyzed: 23 Apr 2026 at 03:28

    Historical Analysis & Change Tracking