atomicheritage.org

https://atomicheritage.org· First analyzed 02 May 2026· Updated 02 May 2026

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atomicheritage.org

Mobile

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Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

34.194.164.173

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Nginx

Nameservers

ns1.webhero.com.ns2.webhero.com.ns3.webhero.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

917 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.2 MB

39 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

nuclearmuseumCustom

Technology Stack

7 Technologies Detected

Analytics

Libraries

CSS Frameworks

Email Marketing

Web Servers

Plugins

SEO Analysis

C62/100

Meta Tags4/15

Content8/12

Headings3/8

Technical23/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile3/4

Indexability3/3

atomicheritage.orgatomicheritage.org

Nuclear Museum

No description available for this page.

Title Length14 chars

Recommended: 50-60 chars (~90px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (10/12) — critical for accessibility and SEO

10 issues found

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Crawlability

Sitemap

Type: index

24 URLs

24 sub-sitemaps

robots.txt

3 rules

Local SEO

Local Search Readiness

20/100

Needs Work

5 12 2

Sponsored

AI & LLM Readiness

D46/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

3/25

Citation

15/25

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:3%

Words:393

Token eff.:Optimal

Sections/1K:15.3

Depth:2/5

Structured Data

2 JSON-LD

WebSiteLocalBusiness×1.1(min)

Citation Readiness

Opening Summary23w

Descriptive Headingsavg 7.5w

Canonical URL

Open Graph2/3

Twitter Card2/3

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.

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

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

6/15

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.

66/100

127 mg

CO₂e / view

1.2 MB

Page Weight

70%

Cleaner Than

New Visitor

145 mg

Returning (cached)

72 mg

Annual (10K/mo)

15.2 kg

Emission Segments

Data Center

6 mg

Network

37 mg

Device

83 mg

Resource Breakdown

JavaScript

124.2 KB

Images

314.4 KB

CSS

798.2 KB

HTML

17.7 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

51d

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

25.03.2026

Valid Until

23.06.2026

Subject Alternative Names (10)

ahf-dev.4sitestudios.comahf.nuclearmuseum.orgatomicheritage.orgmanhattanprojectvoices.orgranger.nuclearmuseum.orgrangerinyourpocket.orgvoices.nuclearmuseum.orgwww.atomicheritage.org+2 more

SHA-256 Fingerprint

69:77:DF:18:9C:75:00:65:2A:E6:C4:C3:1D:C7:A7:75:97:85:B7:DD...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 1499s(max-age=1499, public)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Sat, 02 May 2026 12:13:14 GMT

etag

"95ded72a367c0d6abe219dce3d312a2c"

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

atomicheritage.org

Domain Age

25y 1m

Created

29.03.2001

Expires

29.03.2027

Last Updated

15.02.2026

Registrar

Webhero, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

84/100

Mobile Friendly10 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, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

roboto

WCAG Partial

70/100

Readability

/30

23/30

16px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

roboto

Sans

Body Font

roboto

Sans16px

Contrast Ratio

1:1

7 issues

Reading Comfort

~33 CPL

Narrow lines

32px

24px

19px

16px

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

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

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

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

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Fluid Type (rem)Flesch 34

Color Palette

9 unique colors

Light

#ffffff

Background· 21.7%

#5780aa

Primary· 19.200000000000003%

#3a628b

Secondary· 13%

#15395d

Accent· 5.9%

#254d75

Accent· 5.4%

#b5b1a1

Secondary· 2.5%

#eef0f1

Secondary· 1.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

ahf.nuclearmuseum.org(4)googletagmanager.com(3)gstatic.com(1)google-analytics.com(1)cdnjs.cloudflare.com(1)

Website Identity

Nuclear Museum

LocalBusiness

info@atomicheritage.org

ahf.nuclearmuseum.org

25 years old

Location detected: 🇺🇸 United Statesvia ip

Webhero, Inc.📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)Instagram

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Last analyzed: 02 May 2026 at 12:13

Historical Analysis & Change Tracking