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stephenwolfram.com

https://stephenwolfram.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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stephenwolfram.com
Desktop screenshot of stephenwolfram.com
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Mobile

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Hosting Provider

Wolfram Research, Inc

IP Address

140.177.52.200

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Mattoon, United States

ASN

AS11106

Organization

Wolfram Research, Inc

Server

Generic Web Server

Nameservers

wri-dns3.wolfram.com.wri-dns2.wolfram.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
673 ms10%
Speed Index
875 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
785 KB
63 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Wolfram Research, Inc

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

3 Technologies Detected

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

SEO Analysis

B74/100
21
6
1
Meta Tags11/15
Content9/12
Headings6/8
Technical23/25
E-E-A-T5/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
S
stephenwolfram.comstephenwolfram.com

Stephen Wolfram: Official Website

Official website of Stephen Wolfram: Founder & CEO of Wolfram Research; creator of Mathematica, Wolfram|Alpha & the Wolfram Language; author of A New Kind of...

Description truncated.
Title Length33 chars

Recommended: 50-60 chars (~202px / 580px)

Description Length165 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (27/39) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,139 URLs

robots.txt

3 rules

Sitemap reference found

Local SEO

Local Search Readiness

10/100
Poor
3 13 1

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

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AI & LLM Readiness

D48/100
Bot Access
20/25
Machine Read.
4/25
Schema Data
10/25
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
Text ratio:6%
Words:206
Token eff.:Too Short
Sections/1K:63.1

Structured Data

3 JSON-LD
Person×1.3Organization×1.1WebSiteSearchAction
sameAs entity links

Citation Readiness

Opening Summary
Descriptive Headingsavg 5.8w
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

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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.
B
72/100
9
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
12/20
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.
30/100
B
97 mg
CO₂e / view
785.3 KB
Page Weight
80%
Cleaner Than
New Visitor
111 mg
vs
Returning (cached)
56 mg
Annual (10K/mo)
11.7 kg
Emission Segments
Data Center
22 mg
Network
23 mg
Device
52 mg
Resource Breakdown
JavaScript
76.3 KB
Images
526.9 KB
CSS
142.7 KB
HTML
17.9 KB
Other
21.5 KB
Green Hosting Not Verified
Wolfram Research, Inc
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

55d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

22.03.2026

Valid Until

20.06.2026

Subject Alternative Names (2)

*.stephenwolfram.comstephenwolfram.com

SHA-256 Fingerprint

D9:49:94:87:18:DD:6D:E1:AD:52:28:45:0F:7B:7D:B0:58:49:30:B7...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-language
en
content-location
index.php.en
content-security-policy
upgrade-insecure-requests
content-type
text/html; charset=UTF-8
date
Sat, 25 Apr 2026 18:41:51 GMT
server
Generic Web Server
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

50

SPF
DKIM
DMARC

MX Records (2)

mx1.wolfram.com
mx2.wolfram.com

Domain Information

stephenwolfram.com

Domain Age
27y 6m

Created

05.10.1998

Expires

04.10.2026

Last Updated

03.09.2025

Registrar

GoDaddy Corporate Domains, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked

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
64/100
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Georgia + Source Sans Pro

WCAG Partial
54/100
Readability
/30
13/30

16px · LH 1.13

Hierarchy
/20
13/20

✓ H1→H6 order

WCAG
/25
17/25

4.35:1 min contrast

Performance
/25
11/25

2 fonts · 8 req

Heading Font

Georgia

Serif0

Body Font

Source Sans Pro

Sans16px

Contrast Ratio

4.35:1

6 issues

Reading Comfort

Serif Headlines + Sans Body

left aligned
16px
h1
14px
h2
16px
h3
16px
p
Major Second
Scale

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

⚠️ Tight line spacing (1.12). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 4.3:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 20

Color Palette

8 unique colors
4.52:1 AA Light
#ffffff
Background· 64.4%
#6f7970
Other· 5.8%
#faca64
Primary· 18.599999999999998%
#b8b795
Secondary· 3.1%
#463938
Secondary· 2.8%
#e5e1d5
Secondary· 2.4%
#978b7e
Secondary· 1.7%
#fae6bd
Accent· 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

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Scripts & Styles

15 Resources

11
Scripts
4
Styles
0
Async
2
Defer

Top Script Sources

local(10)swBlogFeed.js(1)

Website Identity

Stephen Wolfram

Person

Stephen Wolfram is the founder and CEO of Wolfram Research, the creator of Mathematica, Wolfram|Alpha and the Wolfram Language, and the author of a New Kind of Science, An Elementary Introduction to the Wolfram Language, and most recently, Idea Makers: Personal Perspectives on the Lives & Ideas of S

//www.stephenwolfram.com/
27 years old
Location detected: 🇺🇸 United Statesvia ip
GoDaddy Corporate Domains, LLCen

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Last analyzed: 25 Apr 2026 at 18:42

Historical Analysis & Change Tracking