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jessfraz.com

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

Sponsored

Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.61

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

CDN

Cloudflare

WAF

Cloudflare

Nameservers

cody.ns.cloudflare.com.lucy.ns.cloudflare.com.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
786 ms10%
Speed Index
1.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
22 KB
11 requests
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Hugov0.58.2
Infrastructure
Platform
Vercel
CDN
Cloudflare

Technology Stack

8 Technologies Detected

Other

2
ModernizrPolyfill.io

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Platforms

1
Vercel

SEO Analysis

C65/100
19
7
0
Meta Tags7/15
Content11/12
Headings6/8
Technical18/25
E-E-A-T0/7
Images4/7
Links2/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
J
jessfraz.comjessfraz.com

Ramblings from Jessie: Home

The blog of Jessie Frazelle, hacker of all things: systems, kernels, operating systems, etc...

Title Length27 chars

Recommended: 50-60 chars (~167px / 580px)

Description Length94 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    77 URLs

    robots.txt

    3 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    8/100
    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

    D43/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    0/25
    Citation
    12/25

    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
    code blocksnavheader/footer
    Text ratio:48%
    Words:7,154
    Token eff.:Acceptable
    Sections/1K:12.3
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary11w
    Descriptive Headingsavg 5.3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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
    73/100
    9
    Passed
    5
    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
    7/15
    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.
    75/100
    A+
    2 mg
    CO₂e / view
    22.3 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    3 mg
    vs
    Returning (cached)
    1 mg
    Annual (10K/mo)
    276 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    <0.001 g
    Device
    2 mg
    Resource Breakdown
    Fonts
    1.3 KB
    HTML
    21.0 KB
    Green Hosting Verified
    Vercel
    Provider Match
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    76%Good
    Static / Informational

    HTTPS

    No WAF

    82d

    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

    12.05.2026

    Valid Until

    10.08.2026

    Subject Alternative Names (1)

    jessfraz.com

    SHA-256 Fingerprint

    FC:03:E3:28:97:8E:2E:F6:14:A1:2A:73:B5:C0:CC:E3:CC:AC:1A:5E...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    age
    2992896
    cache-control
    🟡 0s(public, max-age=0, must-revalidate)
    content-disposition
    inline
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=utf-8
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (5)

    aspmx.l.google.com
    alt1.aspmx.l.google.com
    aspmx2.googlemail.com
    aspmx3.googlemail.com

    +1 more

    Domain Information

    jessfraz.com

    Domain Age
    13y 8m

    Created

    02.09.2012

    Expires

    02.09.2026

    Last Updated

    02.08.2025

    Registrar

    Gandi SAS

    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.
    C
    66/100
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    IBM Plex Mono + Open Sans

    WCAG Partial
    66/100
    Readability
    /30
    25/30

    20px · LH 1.80

    Hierarchy
    /20
    14/20

    2.25x ratio

    WCAG
    /25
    16/25

    3.46:1 min contrast

    Performance
    /25
    11/25

    3 fonts · 1 req

    Heading Font

    IBM Plex Mono

    Mono45px

    Body Font

    Open Sans

    Sans20px

    Contrast Ratio

    3.46:1

    27 issues

    Reading Comfort

    ~32 CPL

    Narrow lines
    45px
    h1
    35px
    h2
    25px
    h3
    20px
    p

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

    ⚠️ Partial contrast: 27 elements below WCAG AA threshold (min 3.5:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 2.2x larger than body text.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    GGoogle Fonts

    Color Palette

    10 unique colors
    5.15:1 AA Light
    #ffffff
    Background· 93.6%
    #6e6d6e
    Other· 0.5%
    #e0e5e9
    Primary· 0.9%
    #c1d2e3
    Secondary· 0.7%
    #b8c2cd
    Secondary· 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

    8 Resources

    6
    Scripts
    2
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(2)blog.jessfraz.com(2)google-analytics.com(1)polyfill.io(1)

    Website Identity

    jessfraz.com

    13 years old
    Location detected: 🇺🇸 United Statesvia ip
    Gandi SAS📧 Google Workspaceen

    Sponsored

    Last analyzed: 19 May 2026 at 23:07

    Historical Analysis & Change Tracking