StackOptic
Back to Search
davidbrin.com favicon

davidbrin.com

https://davidbrin.com· First analyzed 06 May 2026· Updated 06 May 2026
Export
davidbrin.com
Desktop screenshot of davidbrin.com
Mobile screenshot of davidbrin.com
Mobile

Sponsored

Hosting Provider

HostPapa
hostpapa.com

IP Address

216.222.197.157

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Los Angeles, United States

ASN

AS40092

Organization

HostPapa

Server

Nginx

Nameservers

ns2.hostpapa.com.ns1.hostpapa.com.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
854 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.9 MB
50 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
Blogger
Infrastructure
Hosting
HostPapa

Technology Stack

9 Technologies Detected

Libraries

2
jQueryv1.8.3
Slick Carousel

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Email Marketing

1
Mailchimp

Social

1
ShareThis

Web Servers

1
Nginx

SEO Analysis

C60/100
16
9
0
Meta Tags7/15
Content12/12
Headings8/8
Technical11/21
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
D
davidbrin.comdavidbrin.com

worlds of David Brin

The official website of best-selling science fiction writer and futurist DAVID BRIN

Title Length20 chars

Recommended: 50-60 chars (~120px / 580px)

Description Length83 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    8/100
    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

    D41/100
    Bot Access
    20/25
    Machine Read.
    11/25
    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
    Text ratio:28%
    Words:2,271
    Token eff.:Optimal
    Sections/1K:15.4

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary54w
    Descriptive Headingsavg 4.1w
    Canonical URL
    Open Graph0/3
    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.
    C
    68/100
    9
    Passed
    5
    Critical
    0
    Warnings
    Images & Alt Text
    15/20
    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
    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.
    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.
    24/100
    D
    239 mg
    CO₂e / view
    1.9 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    273 mg
    vs
    Returning (cached)
    136 mg
    Annual (10K/mo)
    28.6 kg
    Emission Segments
    Data Center
    53 mg
    Network
    57 mg
    Device
    128 mg
    Resource Breakdown
    JavaScript
    75.6 KB
    Images
    333.1 KB
    CSS
    1.5 MB
    HTML
    12.8 KB
    Green Hosting Not Verified
    HostPapa
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    70d

    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

    17.04.2026

    Valid Until

    16.07.2026

    Subject Alternative Names (2)

    *.davidbrin.comdavidbrin.com

    SHA-256 Fingerprint

    8E:11:AD:5F:CE:50:78:53:58:22:54:00:0F:C1:89:E3:56:AF:6B:EB...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html
    date
    Wed, 06 May 2026 19:26:11 GMT
    last-modified
    Tue, 31 Mar 2026 19:30:28 GMT
    server
    nginx
    vary
    Accept-Encoding, Accept-Encoding,User-Agent
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    70

    SPF
    DKIM
    DMARC

    MX Records (1)

    davidbrin.com

    Domain Information

    davidbrin.com

    Domain Age
    27 years

    Created

    20.04.1999

    Expires

    20.04.2027

    Last Updated

    19.02.2022

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    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
    53/100
    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
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Roboto

    WCAG Partial
    64/100
    Readability
    /30
    22/30

    15px · LH 1.60

    Hierarchy
    /20
    13/20

    2.4x ratio · ✓ H1→H6

    WCAG
    /25
    14/25

    1:1 min contrast

    Performance
    /25
    15/25

    2 fonts · 3 req

    Heading Font

    Roboto

    Sans36px

    Body Font

    Roboto

    Sans15px

    Contrast Ratio

    1:1

    20 issues

    Reading Comfort

    ~45 CPL

    Narrow lines
    36px
    h1
    100px
    h2
    42px
    h3
    20px
    h4
    15px
    p
    Minor Second
    Scale

    ⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 20 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 2.4x larger than body text.

    GGoogle FontsFlesch 42

    Color Palette

    7 unique colors
    19.5:1 AAA Dark
    #0e0c0d
    Text· 43.300000000000004%
    #ffffff
    Background· 19.200000000000003%
    #bfa28e
    Primary· 7.5%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Social Media

    1
    Twitter/X WidgetsFree

    Social widgets and sharing tools

    2

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    22 Resources

    14
    Scripts
    8
    Styles
    2
    Async
    0
    Defer

    Top Script Sources

    js(10)platform.twitter.com(2)w.sharethis.com(1)rf.revolvermaps.com(1)

    Website Identity

    davidbrin.com

    mail@davidbrin.com
    27 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLCen

    Sponsored

    Last analyzed: 06 May 2026 at 19:26

    Historical Analysis & Change Tracking