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sidis.net

https://sidis.net· First analyzed 15 Jun 2026· Updated 15 Jun 2026
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sidis.net
Desktop screenshot of sidis.net
Mobile screenshot of sidis.net
Mobile

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Hosting Provider

HostDime.com, Inc.

IP Address

138.128.167.186

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Orlando, United States

ASN

AS33182

Organization

HostDime.com, Inc.

Server

Apache

Nameservers

ns1.designspinnerweb.com.ns2.designspinnerweb.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
276 ms10%
Speed Index
359 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.7 MB
156 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
HostDime.com, Inc.

Technology Stack

4 Technologies Detected

Advertising

2
Google AdsGoogle AdSense

Payments

1
PayPal

Web Servers

1
Apache

SEO Analysis

D42/100
9
10
3
Meta Tags8/15
Content11/12
Headings0/8
Technical5/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
S
sidis.netsidis.net

Sidis Archives

William James Sidis, Animate and the Inanimate, cosmology, cosmogony, astrobiology, eternal universe, infinite universe

Title Length14 chars

Recommended: 50-60 chars (~80px / 580px)

Description Length119 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (141/157) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

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Local SEO

Local Search Readiness

0/100
Poor
15 2

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

F26/100
Bot Access
20/25
Machine Read.
2/25
Schema Data
0/25
Citation
4/25

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:14%
Words:4,880
Token eff.:Poor Structure

Structured Data

No Schema

Citation Readiness

Opening Summary49w
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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.
D
40/100
3
Passed
7
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
3/20
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
12/15
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.
5 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.
11/100
E
344 mg
CO₂e / view
2.7 MB
Page Weight
30%
Cleaner Than
New Visitor
393 mg
vs
Returning (cached)
196 mg
Annual (10K/mo)
41.2 kg
Emission Segments
Data Center
77 mg
Network
83 mg
Device
185 mg
Resource Breakdown
JavaScript
54.2 KB
Images
2.3 MB
CSS
8.7 KB
HTML
217.9 KB
Other
115.4 KB
Green Hosting Not Verified
HostDime.com, Inc.
7 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

60d

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

17.05.2026

Valid Until

15.08.2026

Subject Alternative Names (2)

*.sidis.netsidis.net

SHA-256 Fingerprint

88:7A:C6:79:0E:9A:B0:1E:A4:9D:4C:EC:AA:82:B2:B9:B4:F0:BC:59...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
connection
Keep-Alive
content-length
222811
content-type
text/html
date
Mon, 15 Jun 2026 14:51:29 GMT
keep-alive
timeout=5, max=100
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

MX Records (1)

sidis.net

Domain Information

sidis.net

Domain Age
26y 8m

Created

11.10.1999

Expires

11.10.2026

Last Updated

12.10.2025

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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.
F
38/100
Not Mobile Friendly
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.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Times New Roman + arial

WCAG Partial
61/100
Readability
/30
20/30

16px · LH --

Hierarchy
/20
7/20
WCAG
/25
14/25

1.03:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Times New Roman

Body Font

arial

Sans16px

Contrast Ratio

1.03:1

19 issues

Reading Comfort

~96 CPL

Wide lines
16px
p

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

⚠️ Wide lines: ~96 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 1.0:1).

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

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

Flesch 47

Color Palette

10 unique colors
3.39:1 AA Large Dark
#222222
Other· 57.5%
#737568
Other· 5.2%
#101518
Primary· 8.2%
#5b5244
Secondary· 5.1%
#9e8b68
Secondary· 4.8%
#b4aa8c
Secondary· 4.8%
#f4ebd7
Accent· 4.1%
#341d33
Secondary· 0.8%

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Google AdsEnterprise

Ad platforms and retargeting pixels

2

Categories

2

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Ad Networks

Google AdSense

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Scripts & Styles

1 Resources

1
Scripts
0
Styles
1
Async
0
Defer

Top Script Sources

pagead2.googlesyndication.com(1)

Website Identity

sidis.net

26 years old
Location detected: 🇺🇸 United Statesvia ip
GoDaddy.com, LLC

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Last analyzed: 15 Jun 2026 at 14:51

Historical Analysis & Change Tracking