jeffsachs.org

https://jeffsachs.org· First analyzed 06 May 2026· Updated 06 May 2026

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jeffsachs.org

Mobile

Sponsored

Hosting Provider

Squarespace

squarespace.com

IP Address

198.49.23.144

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS53831

Organization

Squarespace, Inc.

Server

Squarespace

Nameservers

ns74.domaincontrol.com.ns73.domaincontrol.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.8 s10%

Speed Index

4.9 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

878 KB

36 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Squarespace

website_builder

Technology Stack

6 Technologies Detected

Frameworks

Alpine.js

Other

Chart.js

CSS Frameworks

Tailwind CSS

Fonts

Adobe Fonts (Typekit)

Email Marketing

Mailchimp

Security

reCAPTCHA

SEO Analysis

B74/100

Meta Tags9/15

Content9/12

Headings1/8

Technical22/25

E-E-A-T5/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile4/4

Indexability3/3

jeffsachs.orgjeffsachs.org

Jeffrey D. Sachs

Jeffrey D. Sachs is a world-renowned economics professor, bestselling author, innovative educator, and global leader in sustainable development.

Title Length16 chars

Recommended: 50-60 chars (~97px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

7 issues found

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Crawlability

Sitemap

Type: standard

3,979 URLs

robots.txt

59 rules

Sitemap reference found

Local SEO

Local Search Readiness

30/100

Needs Work

6 12 1

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AI & LLM Readiness

D44/100

Bot Access

13/25

Machine Read.

10/25

Schema Data

7/25

Citation

14/25

AI Bot Access

5/14 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

nav

Text ratio:4%

Words:989

Token eff.:Optimal

Depth:1/5

Structured Data

3 JSON-LD

Organization×1.1(min)WebSiteLocalBusiness×1.1

sameAs entity links

Citation Readiness

Opening Summary15w

Descriptive Headingsavg 4w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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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.

79/100

Passed

Critical

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

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•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.

57/100

109 mg

CO₂e / view

878.4 KB

Page Weight

80%

Cleaner Than

New Visitor

124 mg

Returning (cached)

62 mg

Annual (10K/mo)

13.0 kg

Emission Segments

Data Center

24 mg

Network

26 mg

Device

58 mg

Resource Breakdown

JavaScript

53.0 KB

Images

592.3 KB

CSS

82.4 KB

HTML

26.9 KB

Other

123.8 KB

Green Hosting Not Verified

Squarespace

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

70d

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

16.04.2026

Valid Until

15.07.2026

Subject Alternative Names (1)

www.jeffsachs.org

SHA-256 Fingerprint

35:92:02:30:AE:F7:57:D6:47:19:46:B8:E8:E5:25:EC:23:54:4F:BF...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

3733

content-encoding

📦 Gzip(gzip)

content-length

27250

content-type

text/html;charset=utf-8

date

Tue, 05 May 2026 23:17:01 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

jeffsachs.org

Domain Age

14y 5m

Created

28.11.2011

Expires

28.11.2026

Last Updated

12.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

61/100

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

initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

minerva-modern

WCAG Partial

58/100

Readability

/30

19/30

14px · LH 1.60

Hierarchy

/20

8/20

WCAG

/25

17/25

1.04:1 min contrast

Performance

/25

14/25

1 font

Heading Font

minerva-modern

Sans

Body Font

minerva-modern

Sans14px

Contrast Ratio

1.04:1

3 issues

Reading Comfort

~44 CPL

Narrow lines

16px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

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

❌ Very complex text: Flesch score 23/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

AAdobe Fonts Buy on MyFontsFlesch 23

Color Palette

6 unique colors

Light

#c6cac8

Other· 3.3%

#fcf7f3

Primary· 65.10000000000001%

#dbdbd1

Secondary· 14.5%

#070e17

Accent· 8.9%

#7b5a55

Secondary· 4.4%

#ad9795

Secondary· 3.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.squarespace.com(10)definitions.sqspcdn.com(3)use.typekit.net(1)static1.squarespace.com(1)

Website Identity

Columbia University

LocalBusiness

www.jeffsachs.org

14 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLCen-US

Social Profiles

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Last analyzed: 06 May 2026 at 00:20

Historical Analysis & Change Tracking