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visionlearning.com

https://visionlearning.com· First analyzed 12 May 2026· Updated 12 May 2026
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visionlearning.com
Desktop screenshot of visionlearning.com
Mobile screenshot of visionlearning.com
Mobile

Sponsored

Hosting Provider

Linode (Akamai)
linode.com

IP Address

66.228.49.95

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Richardson, United States

ASN

AS63949

Organization

Linode

Server

Apache

Nameservers

ns92.worldnic.com.ns91.worldnic.com.

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%
4.7 MB
53 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Linode (Akamai)

Technology Stack

12 Technologies Detected

Advertising

4
Google AdsGoogle AdSenseCriteoOutbrain

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Material Icons

Fonts

1
Google Fonts

Payments

1
Square

Web Servers

1
Apache

SEO Analysis

C68/100
17
10
0
Meta Tags12/15
Content10/12
Headings5/8
Technical17/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile3/4
Indexability3/3
V
visionlearning.comvisionlearning.com

Visionlearning | Your insight into science

Visionlearning is a free resource for the study of science, technology and math (STEM).

Title Length42 chars

Recommended: 50-60 chars (~240px / 580px)

Description Length87 chars

Recommended: 120-160 chars

Issues (0)

    10 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    2,179 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 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.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:13%
    Words:11,086
    Token eff.:Excessive
    Sections/1K:1.4
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary23w
    Descriptive Headingsavg 2.9w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    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
    75/100
    11
    Passed
    3
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    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
    4/15
    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.
    40/100
    F
    483 mg
    CO₂e / view
    4.7 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    552 mg
    vs
    Returning (cached)
    276 mg
    Annual (10K/mo)
    57.9 kg
    Emission Segments
    Data Center
    24 mg
    Network
    142 mg
    Device
    317 mg
    Resource Breakdown
    JavaScript
    404.7 KB
    Images
    4.2 MB
    CSS
    49.0 KB
    Fonts
    8.4 KB
    HTML
    20.8 KB
    Green Hosting Verified
    Linode (Akamai)
    Provider Match
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    80d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    03.05.2026

    Valid Until

    01.08.2026

    Subject Alternative Names (5)

    visionlearning.comvisionlearning.orgweb.visionlearning.comwww.visionlearning.comwww.visionlearning.org

    SHA-256 Fingerprint

    C8:C6:04:BB:DA:E4:E4:FF:CB:0E:A9:B0:C1:A5:8C:70:83:7C:05:A2...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    21047
    content-type
    text/html; charset=utf-8
    date
    Tue, 12 May 2026 06:43:47 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    95

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    mail.visionlearning.com

    Domain Information

    visionlearning.com

    Domain Age
    27y 6m

    Created

    13.11.1998

    Expires

    12.11.2028

    Last Updated

    13.09.2023

    Registrar

    Network Solutions, LLC

    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 Friendly11 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=1.0, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans

    WCAG Partial
    65/100
    Readability
    /30
    14/30

    12px · LH 1.33

    Hierarchy
    /20
    16/20

    3.71x ratio

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    18/25

    1 font · 6 req

    Heading Font

    Open Sans

    Sans45px

    Body Font

    Open Sans

    Sans12px

    Contrast Ratio

    1:1

    2 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    45px
    h1
    38px
    h2
    27px
    h3
    12px
    p

    ❌ 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.

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

    ⚠️ Partial contrast: 2 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 3.7x larger than body text.

    GGoogle FontsFluid TypeFlesch 48

    Color Palette

    8 unique colors
    5.74:1 AA Dark
    #666666
    Other· 28.000000000000004%
    #ffffff
    Background· 19.9%
    #08130d
    Secondary· 13.7%
    #311c15
    Primary· 12.2%
    #213738
    Primary· 8.4%
    #443930
    Secondary· 7.1%
    #c7ccd3
    Secondary· 3%

    Business & Marketing Stack

    2 Tools Detected

    Advanced

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Google AdsEnterprise

    Ad platforms and retargeting pixels

    2

    Categories

    2

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Ad Networks

    Google AdSenseMedia.netSovrnPubMaticOpenXIndex Exchange

    Sponsored

    Scripts & Styles

    12 Resources

    8
    Scripts
    4
    Styles
    4
    Async
    0
    Defer

    Top Script Sources

    local(3)pagead2.googlesyndication.com(2)fundingchoicesmessages.google.com(2)googletagmanager.com(1)

    Website Identity

    visionlearning.com

    27 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLCen

    Sponsored

    Last analyzed: 12 May 2026 at 06:44

    Historical Analysis & Change Tracking