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bulletphysics.org

https://bulletphysics.org· First analyzed 24 May 2026· Updated 24 May 2026
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bulletphysics.org
Desktop screenshot of bulletphysics.org
Mobile screenshot of bulletphysics.org
Mobile

Sponsored

Hosting Provider

Squarespace
squarespace.com

IP Address

198.185.159.144

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS53831

Organization

Squarespace, Inc.

Server

Apache

Nameservers

ns-cloud-a2.googledomains.com.ns-cloud-a1.googledomains.com.ns-cloud-a3.googledomains.com.ns-cloud-a4.googledomains.com.

Performance

88

Core Web Vitals

Weight

First Contentful Paint
1.6 s10%
Speed Index
2.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.9 MB
20 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv5.9.13
cms
twentyfourteen

Technology Stack

7 Technologies Detected

Plugins

3
Custom Twitter FeedsFourteen ColorsPage Links To

Libraries

1
jQueryv3.6.0

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Web Servers

1
Apachev2.4.18

SEO Analysis

D55/100
15
9
3
Meta Tags4/15
Content11/12
Headings6/8
Technical11/21
E-E-A-T3/7
Images3/7
Links4/5
URL5/5
Social0/5
Freshness2/4
Mobile3/4
Indexability3/3
B
bulletphysics.orgbulletphysics.org

Bullet Real-Time Physics Simulation | Home of Bullet and PyBullet: ...

No description available for this page.

Title truncated.
Title Length149 chars

Recommended: 50-60 chars (~881px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Title is too long (149 chars, ~881px). Will be truncated in search results.
  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (7/8) — critical for accessibility and SEO

12 issues found

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Local SEO

Local Search Readiness

6/100
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

D46/100
Bot Access
20/25
Machine Read.
14/25
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
navheader/footer
Text ratio:11%
Words:1,047
Token eff.:Optimal
Sections/1K:1
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary55w
Descriptive Headingsavg 15w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (5)
AI readiness recommendation preview...
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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.
A
85/100
14
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
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
15/15
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.
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.
40/100
D
246 mg
CO₂e / view
1.9 MB
Page Weight
50%
Cleaner Than
New Visitor
282 mg
vs
Returning (cached)
141 mg
Annual (10K/mo)
29.6 kg
Emission Segments
Data Center
55 mg
Network
59 mg
Device
132 mg
Resource Breakdown
JavaScript
51.2 KB
Images
1.8 MB
CSS
50.0 KB
Fonts
836 B
HTML
14.3 KB
Green Hosting Not Verified
Squarespace
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

182d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

21.10.2025

Valid Until

22.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

pybullet.orgwww.pybullet.org

SHA-256 Fingerprint

24:11:67:C7:7E:60:F9:08:DB:EB:CD:B5:7A:A1:2D:EE:5F:2D:35:5C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection
close
content-encoding
📦 Gzip(gzip)
content-length
14302
content-type
text/html; charset=UTF-8
date
Sun, 24 May 2026 01:00:00 GMT
link
<https://pybullet.org/wordpress/index.php/wp-json/>; rel="ht...
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

bulletphysics.org

Domain Age
17y 5m

Created

10.12.2008

Expires

10.12.2026

Last Updated

30.11.2025

Registrar

Squarespace Domains II LLC

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.
C
66/100
Mobile Friendly8 breakpoints
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Lato

WCAG AA
70/100
Readability
/30
19/30

16px · LH 1.50

Hierarchy
/20
14/20

2.06x ratio

WCAG
/25
22/25

4.54:1 min contrast

Performance
/25
15/25

1 font · 1 req

Heading Font

Lato

Sans33px

Body Font

Lato

Sans16px

Contrast Ratio

4.54:1

WCAG AA (≥4.5:1)

Reading Comfort

Single Font Family

left aligned
33px
h1
12px
h2
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

GGoogle FontsBuy on MyFontsFlesch 0

Color Palette

9 unique colors
12:1 AAA Light
#ffffff
Background· 42.5%
#343738
Other· 4.7%
#b7b9c8
Primary· 12.399999999999999%
#71625a
Secondary· 5.9%
#ada297
Secondary· 5%
#d5cfc6
Secondary· 3.7%
#f2f1ef
Secondary· 2.2%

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

11 Resources

5
Scripts
6
Styles
0
Async
1
Defer

Top Script Sources

pybullet.org(5)

Website Identity

bulletphysics.org

17 years old
Location detected: 🇺🇸 United Statesvia ip
Squarespace Domains II LLCen-US

Social Profiles

FacebookGitHub

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Last analyzed: 24 May 2026 at 01:00

Historical Analysis & Change Tracking