StackOptic
Back to Search
grouplens.org favicon

grouplens.org

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

Sponsored

Hosting Provider

University of Minnesota

IP Address

128.101.96.212

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Minneapolis, United States

ASN

AS217

Organization

University of Minnesota

Server

Apache

Nameservers

dns1.easydns.com.dns2.easydns.net.dns3.easydns.ca.

Performance

96

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 MB
30 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms

Technology Stack

8 Technologies Detected

Analytics

2
Google Analytics
Segment

Libraries

1
jQueryv1.10.2

Other

1
Modernizr

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Web Servers

1
Apachev2.4.52

Plugins

1
Jetpack

SEO Analysis

C68/100
20
7
0
Meta Tags5/15
Content10/12
Headings7/8
Technical19/25
E-E-A-T0/7
Images6/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
G
grouplens.orggrouplens.org

GroupLens

GroupLens Center for Social and Human-Centered Computing

Title Length9 chars

Recommended: 50-60 chars (~58px / 580px)

Description Length56 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    2 URLs

    2 sub-sitemaps

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    11/100
    Poor
    3 12 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D42/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    0/25
    Citation
    10/25

    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
    navheader/footer
    Text ratio:11%
    Words:500
    Token eff.:Optimal
    Sections/1K:6
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary18w
    Descriptive Headingsavg 2.3w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    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
    11
    Passed
    3
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    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
    3/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    25/100
    F
    507 mg
    CO₂e / view
    4.0 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    579 mg
    vs
    Returning (cached)
    290 mg
    Annual (10K/mo)
    60.8 kg
    Emission Segments
    Data Center
    113 mg
    Network
    122 mg
    Device
    272 mg
    Resource Breakdown
    JavaScript
    49.7 KB
    Images
    3.9 MB
    CSS
    55.4 KB
    Fonts
    1021 B
    HTML
    8.5 KB
    Green Hosting Not Verified
    University of Minnesota
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    54d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    28.03.2026

    Valid Until

    26.06.2026

    Subject Alternative Names (1)

    grouplens.org

    SHA-256 Fingerprint

    26:C6:6A:C0:AE:B8:3A:18:C1:3F:BF:89:05:6F:22:C9:06:DB:3B:A6...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    connection
    Keep-Alive
    content-encoding
    📦 Gzip(gzip)
    content-length
    8428
    content-type
    text/html; charset=UTF-8
    date
    Sun, 03 May 2026 04:32:35 GMT
    keep-alive
    timeout=5, max=100
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (1)

    mail.cs.umn.edu

    Domain Information

    grouplens.org

    Domain Age
    27y 5m

    Created

    20.11.1998

    Expires

    19.11.2032

    Last Updated

    10.09.2023

    Registrar

    easyDNS Technologies Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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
    72/100
    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, initial-scale=1.0

    Typography & Readability

    Ubuntu + Helvetica Neue

    WCAG Partial
    76/100
    Readability
    /30
    23/30

    16px · LH 1.50

    Hierarchy
    /20
    14/20

    3x ratio

    WCAG
    /25
    18/25

    2.26:1 min contrast

    Performance
    /25
    21/25

    System fonts

    Heading Font

    Ubuntu

    Sans48px

    Body Font

    Helvetica Neue

    Sans16px

    Contrast Ratio

    2.26:1

    31 issues

    Reading Comfort

    ~39 CPL

    Narrow lines
    48px
    h1
    30px
    h2
    18px
    h4
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 31 elements below WCAG AA threshold (min 2.3:1).

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

    ✅ Strong hierarchy: Headlines are 3.0x larger than body text.

    GGoogle FontsBuy on MyFontsFluid Type (rem)Flesch 35

    Color Palette

    6 unique colors
    Light
    #ffffff
    Background· 36.800000000000004%
    #16bbe8
    Primary· 49.3%
    #aed8e2
    Secondary· 5.8%
    #3bc4e5
    Accent· 2.4%
    #4e859d
    Secondary· 1.3%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    15 Resources

    7
    Scripts
    8
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    local(4)google-analytics.com(1)ajax.googleapis.com(1)stats.wp.com(1)

    Website Identity

    grouplens.org

    27 years old
    Location detected: 🇺🇸 United Statesvia ip
    easyDNS Technologies Inc.en

    Social Profiles

    X (Twitter)GitHub

    Sponsored

    Last analyzed: 03 May 2026 at 04:32

    Historical Analysis & Change Tracking