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petervis.com

https://petervis.com· First analyzed 19 May 2026· Updated 19 May 2026
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petervis.com
Desktop screenshot of petervis.com
Mobile screenshot of petervis.com
Mobile

Sponsored

Hosting Provider

I Fastnet Ltd

IP Address

31.22.4.101

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Newcastle upon Tyne, United Kingdom

ASN

AS34119

Organization

I Fastnet Ltd

Server

OpenResty

Nameservers

ns2.byethost29.org.ns1.byethost29.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
317 ms10%
Speed Index
412 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
737 KB
5 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
I Fastnet Ltd

Technology Stack

1 Technologies Detected

Web Servers

1
OpenResty

SEO Analysis

A82/100
25
4
0
Meta Tags9/15
Content8/12
Headings8/8
Technical22/25
E-E-A-T7/7
Images4/7
Links4/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
P
petervis.competervis.com

The Quantum Archive

The Quantum Archive is a curated collection of knowledge, research, and insights on electronics, computing, and history, hosted on Petervis.com since 1999.

Title Length19 chars

Recommended: 50-60 chars (~121px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    8,116 URLs

    robots.txt

    6 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    13/100
    Poor
    4 12 1

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

    Sponsored

    AI & LLM Readiness

    C66/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    13/25
    Citation
    19/25

    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
    blockquotesheader/footer
    Text ratio:11%
    Words:320
    Token eff.:Optimal
    Sections/1K:3.1
    Depth:2/5

    Structured Data

    7 JSON-LD
    FAQPage×1.5Person×1.3Organization×1.1WebSiteBreadcrumbList

    Citation Readiness

    Opening Summary44w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (5)
    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.
    A
    85/100
    13
    Passed
    2
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    11/15
    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...
    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.
    52/100
    B
    91 mg
    CO₂e / view
    736.7 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    104 mg
    vs
    Returning (cached)
    52 mg
    Annual (10K/mo)
    10.9 kg
    Emission Segments
    Data Center
    20 mg
    Network
    22 mg
    Device
    49 mg
    Resource Breakdown
    Images
    728.3 KB
    CSS
    1.8 KB
    HTML
    6.6 KB
    Green Hosting Not Verified
    I Fastnet Ltd
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    60d

    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

    20.04.2026

    Valid Until

    19.07.2026

    Subject Alternative Names (2)

    *.petervis.competervis.com

    SHA-256 Fingerprint

    3D:D3:8D:19:FC:F1:21:42:75:14:3D:E7:0A:C5:BD:B1:30:E5:B1:FA...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔵 1 Days(public, max-age=86400, immutable, max-age=500, public, proxy...)
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=utf-8
    date
    Tue, 19 May 2026 20:28:10 GMT
    expires
    Tue, 19 May 2026 20:36:30 GMT
    last-modified
    Sat, 10 Jan 2026 09:02:00 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    70

    SPF
    DKIM
    DMARC

    MX Records (1)

    petervis.com

    Domain Information

    petervis.com

    Domain Age
    14y 10m

    Created

    04.07.2011

    Expires

    04.07.2030

    Last Updated

    05.07.2021

    Registrar

    Mesh Digital Limited

    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.
    B
    72/100
    Mobile Friendly5 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

    EB Garamond

    WCAG AAA
    78/100
    Readability
    /30
    23/30

    22px · LH 1.60

    Hierarchy
    /20
    16/20

    2.5x ratio · ✓ H1→H6

    WCAG
    /25
    23/25

    12.1:1 min contrast

    Performance
    /25
    16/25

    2 fonts

    Heading Font

    EB Garamond

    Serif55px

    Body Font

    EB Garamond

    Serif22px

    Contrast Ratio

    12.1:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~32 CPL

    Narrow lines
    55px
    h1
    33px
    h2
    22px
    p

    ✅ Excellent readability: 22px body text is ideal for all devices.

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

    ⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 12.1:1).

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

    ✅ Strong hierarchy: Headlines are 2.5x larger than body text.

    Buy on MyFontsFluid TypeFlesch 37

    Color Palette

    6 unique colors
    9.81:1 AAA Light
    #ffffff
    Background· 59.199999999999996%
    #464341
    Other· 0.7%

    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

    2 Resources

    1
    Scripts
    1
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    gstatic.com(1)

    Website Identity

    The Quantum Archive

    CreativeWork

    The Quantum Archive is a digital archive of quantum knowledge and technology curated by Peter Vis on Petervis.com.

    www.petervis.com/index.html
    14 years old
    Location detected: 🇬🇧 United Kingdomvia ip
    Mesh Digital Limiteden

    Sponsored

    Last analyzed: 19 May 2026 at 20:28

    Historical Analysis & Change Tracking