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githubengineering.com

https://githubengineering.com· First analyzed 14 May 2026· Updated 14 May 2026
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githubengineering.com
Desktop screenshot of githubengineering.com
Mobile screenshot of githubengineering.com
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

185.199.110.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

dns2.p08.nsone.net.dns3.p08.nsone.net.dns4.p08.nsone.net.dns1.p08.nsone.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
492 ms10%
Speed Index
640 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
130 KB
22 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Frontend
Framework
Jekyllv3.9.0
Infrastructure
Platform
GitHub Pages
CDN
Fastly

Technology Stack

1 Technologies Detected

CSS Frameworks

1
Tailwind CSS

SEO Analysis

B74/100
21
7
0
Meta Tags11/15
Content7/12
Headings6/8
Technical20/25
E-E-A-T5/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
G
githubengineering.comgithubengineering.com

GitHub Engineering | The Blog of the GitHub Engineering Team

The Blog of the GitHub Engineering Team

Title Length60 chars

Recommended: 50-60 chars (~362px / 580px)

Description Length39 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    14 URLs

    robots.txt

    1 rules

    Sitemap reference found

    Allows all crawlers

    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

    D51/100
    Bot Access
    20/25
    Machine Read.
    12/25
    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:14%
    Words:312
    Token eff.:Optimal
    Sections/1K:3.2
    Depth:1/5

    Structured Data

    1 JSON-LD
    Person×1.3WebSite

    Citation Readiness

    Opening Summary37w
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph2/3
    Twitter Card1/3
    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
    8
    Passed
    4
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    13/20
    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...
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    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.
    62/100
    A+
    16 mg
    CO₂e / view
    130.0 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    18 mg
    vs
    Returning (cached)
    9 mg
    Annual (10K/mo)
    1.9 kg
    Emission Segments
    Data Center
    4 mg
    Network
    4 mg
    Device
    9 mg
    Resource Breakdown
    Images
    75.1 KB
    CSS
    51.5 KB
    HTML
    3.4 KB
    Green Hosting Not Verified
    GitHub Pages
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    76%Good
    Static / Informational

    HTTPS

    No WAF

    77d

    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

    02.05.2026

    Valid Until

    31.07.2026

    Subject Alternative Names (2)

    githubengineering.comwww.githubengineering.com

    SHA-256 Fingerprint

    61:15:48:6C:DD:98:A8:26:01:40:85:11:D8:65:BB:D1:9D:DD:66:43...

    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
    3137
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    githubengineering.com

    Domain Age
    11y 1m

    Created

    04.04.2015

    Expires

    04.04.2027

    Last Updated

    03.03.2025

    Registrar

    MarkMonitor Inc.

    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
    49/100
    Not 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, maximum-scale=1
    3 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Helvetica Neue

    WCAG Partial
    74/100
    Readability
    /30
    24/30

    16px · LH 1.60

    Hierarchy
    /20
    13/20

    2.31x ratio

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    21/25

    System fonts

    Heading Font

    Helvetica Neue

    Sans37px

    Body Font

    Helvetica Neue

    Sans16px

    Contrast Ratio

    1:1

    18 issues

    Reading Comfort

    ~40 CPL

    Narrow lines
    37px
    h1
    18px
    h2
    16px
    p

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

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

    ⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 2.3x larger than body text.

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    Color Palette

    7 unique colors
    14.52:1 AAA Light
    #ffffff
    Text· 50.9%
    #29292b
    Other· 5.3%
    #4a5ca4
    Primary· 33.2%
    #afb3bd
    Secondary· 4.5%
    #6d7ca6
    Secondary· 2.2%
    #303c56
    Secondary· 1%

    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

    6 Resources

    0
    Scripts
    6
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    Website Identity

    GitHub Engineering

    The Blog of the GitHub Engineering Team

    githubengineering.com/
    11 years old
    Location detected: 🇺🇸 United Statesvia ip
    MarkMonitor Inc.en-us

    Social Profiles

    X (Twitter)GitHub

    Sponsored

    Last analyzed: 14 May 2026 at 23:21

    Historical Analysis & Change Tracking