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jazco.dev

https://jazco.dev· First analyzed 16 May 2026· Updated 16 May 2026
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jazco.dev
Desktop screenshot of jazco.dev
Mobile screenshot of jazco.dev
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

185.199.111.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

justin.ns.cloudflare.com.candy.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
454 ms10%
Speed Index
590 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
6 KB
2 requests
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Jekyllv3.9.3
Infrastructure
Platform
GitHub Pages
CDN
Fastly

SEO Analysis

C65/100
19
6
0
Meta Tags10/15
Content10/12
Headings3/8
Technical16/21
E-E-A-T5/7
Images0/7
Links3/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
J
jazco.devjazco.dev

Jaz's Blog · A space where I rant about computers

A space where I rant about computers

Title Length49 chars

Recommended: 50-60 chars (~302px / 580px)

Description Length36 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 1

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

    Sponsored

    AI & LLM Readiness

    D53/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    5/25
    Citation
    14/25

    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
    header/footer
    Text ratio:43%
    Words:725
    Token eff.:Optimal
    Sections/1K:1.4
    Depth:1/5

    Structured Data

    1 JSON-LD
    Person×1.3WebSite

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 9w
    Canonical URL
    Open Graph2/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    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
    9
    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
    15/20
    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
    1/15
    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.
    68/100
    A+
    <0.001 g
    CO₂e / view
    5.8 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    <0.001 g
    vs
    Returning (cached)
    <0.001 g
    Annual (10K/mo)
    84 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    <0.001 g
    Device
    <0.001 g
    Resource Breakdown
    CSS
    2.0 KB
    HTML
    3.8 KB
    Green Hosting Not Verified
    GitHub Pages
    2 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    72d

    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

    28.04.2026

    Valid Until

    27.07.2026

    Subject Alternative Names (2)

    jazco.devwww.jazco.dev

    SHA-256 Fingerprint

    E7:EC:62:24:E8:E7:E5:27:17:96:D0:70:E2:B3:9B:4C:5D:AE:90:80...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    access-control-allow-origin
    *
    age
    0
    cache-control
    🟡 600s(max-age=600)
    content-encoding
    📦 Gzip(gzip)
    content-length
    3557
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (3)

    route2.mx.cloudflare.net
    route1.mx.cloudflare.net
    route3.mx.cloudflare.net

    Domain Information

    jazco.dev

    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.
    C
    62/100
    Mobile Friendly
    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

    -apple-system

    WCAG Partial
    83/100
    Readability
    /30
    26/30

    20px · LH 1.50

    Hierarchy
    /20
    16/20

    2x ratio

    WCAG
    /25
    19/25

    1.61:1 min contrast

    Performance
    /25
    22/25

    System fonts

    Heading Font

    -apple-system

    Sans40px

    Body Font

    -apple-system

    Sans20px

    Contrast Ratio

    1.61:1

    2 issues

    Reading Comfort

    Single Font Family

    left aligned
    40px
    h1
    25px
    h3

    ✅ Excellent readability: 20px body text is ideal for all devices.

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

    ⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.6:1).

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

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

    Flesch 40

    Color Palette

    9 unique colors
    16:1 AAA Light
    #ffffff
    Background· 88.49999999999999%
    #232122
    Other· 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

    1 Resources

    0
    Scripts
    1
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    Website Identity

    Jaz’s Blog

    A space where I rant about computers

    jazco.dev/
    Location detected: 🇺🇸 United Statesvia ip
    en

    Sponsored

    Last analyzed: 16 May 2026 at 03:47

    Historical Analysis & Change Tracking