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bramcohen.com

https://bramcohen.com· First analyzed 07 May 2026· Updated 07 May 2026
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bramcohen.com
Desktop screenshot of bramcohen.com
Mobile screenshot of bramcohen.com
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.5.20

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

leia.ns.cloudflare.com.merlin.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
655 ms10%
Speed Index
852 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
32 KB
143 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Substack

Technology Stack

5 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

CDN

1
Cloudflare

Frameworks

1
Express

Analytics

1
Sentry

SEO Analysis

B70/100
24
7
0
Meta Tags9/15
Content5/12
Headings5/8
Technical20/25
E-E-A-T5/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness2/4
Mobile1/4
Indexability3/3
B
bramcohen.combramcohen.com

Bram’s Thoughts | Substack

Engineering, math, and lots of random stuff. Click to read Bram’s Thoughts, by Bram Cohen, a Substack publication with thousands of subscribers.

Title Length26 chars

Recommended: 50-60 chars (~161px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    113 URLs

    robots.txt

    24 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

    D44/100
    Bot Access
    20/25
    Machine Read.
    2/25
    Schema Data
    7/25
    Citation
    15/25

    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:0%
    Words:208
    Token eff.:Too Short

    Structured Data

    1 JSON-LD
    Organization×1.1WebSiteSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary
    Descriptive Headings
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    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.
    C
    67/100
    9
    Passed
    5
    Critical
    2
    Warnings
    Images & Alt Text
    18/20
    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
    10/15
    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
    4/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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.
    81/100
    A+
    3 mg
    CO₂e / view
    32.4 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    4 mg
    vs
    Returning (cached)
    2 mg
    Annual (10K/mo)
    396 g
    Emission Segments
    Data Center
    <0.001 g
    Network
    1 mg
    Device
    2 mg
    Resource Breakdown
    HTML
    32.4 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    C

    Security Score

    61%Fair
    Interactive

    HTTPS

    WAF

    73d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    20.04.2026

    Valid Until

    19.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    bramcohen.com

    SHA-256 Fingerprint

    D5:86:7A:A8:AD:2E:C7:F5:C5:87:07:6E:27:A6:54:85:5B:75:BF:1F...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    2585
    alt-svc
    h3=":443"; ma=86400
    cache-control
    🔴 No Cache(no-cache)
    cf-cache-status
    DYNAMIC
    cf-ray🇫🇷 Paris
    9f7faede594b2a63-CDG
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (5)

    alt4.aspmx.l.google.com
    alt3.aspmx.l.google.com
    alt2.aspmx.l.google.com
    aspmx.l.google.com

    +1 more

    Domain Information

    bramcohen.com

    Domain Age
    21y 4m

    Created

    13.12.2004

    Expires

    13.12.2026

    Last Updated

    13.11.2025

    Registrar

    NameCheap, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    Privacy policy page linked
    Data Protection Officer mentioned

    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
    67/100
    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, maximum-scale=1, user-scalable=0, viewport-fit=cover
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    SF Pro Display + -apple-system

    WCAG Partial
    59/100
    Readability
    /30
    18/30

    19px · LH --

    Hierarchy
    /20
    9/20

    1.26x ratio

    WCAG
    /25
    16/25

    4:1 min contrast

    Performance
    /25
    16/25

    System fonts

    Heading Font

    SF Pro Display

    Sans24px

    Body Font

    -apple-system

    Sans19px

    Contrast Ratio

    4:1

    25 issues

    Reading Comfort

    Dual Sans-Serif

    left aligned
    24px
    h1
    14px
    h4

    ✅ Excellent readability: 19px body text is ideal for all devices.

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 4.0:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

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

    Buy on MyFontsFlesch 0

    Color Palette

    5 unique colors
    2.12:1 Fail Light
    #ffffff
    Background· 93.99999999999997%
    #b6b1b1
    Other· 2%
    #efeeea
    Primary· 1.4%
    #c0585b
    Secondary· 1.2%

    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

    30 Resources

    20
    Scripts
    10
    Styles
    0
    Async
    19
    Defer

    Top Script Sources

    substackcdn.com(19)js.sentry-cdn.com(1)

    Website Identity

    Bram’s Thoughts

    Engineering, math, and lots of random stuff

    21 years old
    Location detected: 🇨🇦 Canadavia ip
    NameCheap, Inc.📧 Google Workspaceen

    Sponsored

    Last analyzed: 07 May 2026 at 10:54

    Historical Analysis & Change Tracking