algodoo.com

https://algodoo.com· First analyzed 11 May 2026· Updated 11 May 2026

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algodoo.com

Mobile

Sponsored

Hosting Provider

pair Networks

IP Address

66.39.87.79

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Pittsburgh, United States

ASN

AS7859

Organization

pair Networks

Server

Apache

Nameservers

ns7.ns0.com.ns557.pair.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

7.8 s10%

Speed Index

10.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

939 KB

68 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

u-designCustom

Technology Stack

10 Technologies Detected

Plugins

Revslider Wp Pagenavi

Libraries

CSS Frameworks

Fonts

Analytics

Tag Managers

Payments

Web Servers

Customer Support

SEO Analysis

D46/100

Meta Tags7/15

Content7/12

Headings8/8

Technical12/25

E-E-A-T0/7

Images1/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

algodoo.comalgodoo.com

Algodoo

Algodoo,Physic,Physics,Interactive Physics,Interact,Force,Friction,Fluid,Mechanic,Motion,Optic,Energy,Science,Simulate,Simulation,STEM,Plot,Learn,Teach,Home ...

Description truncated.

Title Length7 chars

Recommended: 50-60 chars (~41px / 580px)

Description Length253 chars

Recommended: 120-160 chars

Issues (2)

• Most images missing alt text (29/30) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

14 issues found

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Local SEO

Local Search Readiness

3/100

Poor

1 14 2

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

Sponsored

AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

10/25

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

blockquotes

Text ratio:4%

Words:345

Token eff.:Optimal

Sections/1K:14.5

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 3.2w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

66/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

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.

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.

52/100

95 mg

CO₂e / view

938.6 KB

Page Weight

80%

Cleaner Than

New Visitor

108 mg

Returning (cached)

54 mg

Annual (10K/mo)

11.4 kg

Emission Segments

Data Center

5 mg

Network

28 mg

Device

62 mg

Resource Breakdown

JavaScript

341.6 KB

Images

333.7 KB

CSS

215.1 KB

Fonts

1.8 KB

HTML

46.4 KB

Green Hosting Verified

pair Networks

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

64d

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/1.1

Valid From

16.04.2026

Valid Until

15.07.2026

Subject Alternative Names (2)

algodoo.comwww.algodoo.com

SHA-256 Fingerprint

EF:28:17:DE:FE:67:6A:3C:46:1C:8B:28:31:03:DD:24:4B:92:F1:ED...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 60s(max-age=60)

connection

Keep-Alive

content-type

text/html; charset=UTF-8

date

Mon, 11 May 2026 15:43:55 GMT

expires

Mon, 11 May 2026 15:44:55 GMT

keep-alive

timeout=5, max=100

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

vqs3923.pair.com

Domain Information

algodoo.com

Domain Age

17y 5m

Created

14.12.2008

Expires

14.12.2027

Last Updated

14.11.2025

Registrar

pair Networks, Inc. d/b/a pair Domains

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.

38/100

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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Source Sans Pro + PT Sans

WCAG Partial

61/100

Readability

/30

17/30

13px · LH 1.70

Hierarchy

/20

17/20

2.64x ratio · ✓ H1→H6

WCAG

/25

14/25

1:1 min contrast

Performance

/25

13/25

2 fonts · 2 req

Heading Font

Source Sans Pro

Sans34px

Body Font

PT Sans

Sans13px

Contrast Ratio

1:1

29 issues

Reading Comfort

~57 CPL

Optimal (45–75)

34px

36px

27px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~57 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 29 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

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

GGoogle FontsFlesch 69

Color Palette

4 unique colors

5.4:1 AA Light

#f9f9f9

Background· 51.9%

#646674

Other· 8.7%

#aec8b2

Primary· 6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

algodoo.com(9)youtube.com(2)googletagmanager.com(2)

Website Identity

algodoo.com

17 years old

Location detected: 🇺🇸 United Statesvia ip

pair Networks, Inc. d/b/a pair Domainsen-US

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Last analyzed: 11 May 2026 at 15:44

Historical Analysis & Change Tracking