nhd.org

https://nhd.org· First analyzed 10 May 2026· Updated 10 May 2026

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nhd.org

Mobile

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Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.92.242

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

chin.ns.cloudflare.com.carter.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

603 ms10%

Speed Index

784 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.3 MB

55 requests

Image Optimization

Lazy LoadAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

NHDCustom

by Openbox9 (Joe Tan)

View Theme

Technology Stack

15 Technologies Detected

Plugins

Ays Popup Box Translatepress Multilingual Stop User Enumeration

Analytics

Libraries

Other

CSS Frameworks

Icon Libraries

CDN

SEO Analysis

A81/100

Meta Tags9/15

Content10/12

Headings6/8

Technical25/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile4/4

Indexability3/3

nhd.orgnhd.org

Home - National History Day

National History Day forms thoughtful citizens and confident teachers by improving the teaching and learning of history.

Title Length27 chars

Recommended: 50-60 chars (~163px / 580px)

Description Length120 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (25/35) — critical for accessibility and SEO

6 issues found

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Crawlability

Sitemap

Type: index

17 URLs

17 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

30/100

Needs Work

8 10

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AI & LLM Readiness

D58/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

8/25

Citation

20/25

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:3%

Words:533

Token eff.:Optimal

Sections/1K:22.5

Structured Data

5 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary40w

Descriptive Headingsavg 7.1w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

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.

74/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

16/20

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

11/15

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.

3 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.

47/100

240 mg

CO₂e / view

2.3 MB

Page Weight

30%

Cleaner Than

New Visitor

274 mg

Returning (cached)

137 mg

Annual (10K/mo)

28.8 kg

Emission Segments

Data Center

12 mg

Network

71 mg

Device

158 mg

Resource Breakdown

JavaScript

231.7 KB

Images

1.8 MB

CSS

245.1 KB

HTML

23.5 KB

Green Hosting Verified

Cloudflare

GWF Verified

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Interactive

HTTPS

WAF

59d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.04.2026

Valid Until

08.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

nhd.org*.nhd.org

SHA-256 Fingerprint

2C:37:9E:E2:45:F2:1D:C1:1D:06:FA:11:50:CB:1C:A1:44:F2:70:72...

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(max-age=0)

cf-cache-status

DYNAMIC

cf-ray🇮🇹 Milan

9f9a00d7edfded2a-MXP

content-encoding

zstd

content-security-policy

default-src * 'unsafe-inline' 'unsafe-eval' data: blob:;

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt1.aspmx.l.google.com

alt4.aspmx.l.google.com

aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

nhd.org

Domain Age

23 years

Created

29.04.2003

Expires

29.04.2027

Last Updated

28.02.2022

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

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.

76/100

Mobile Friendly5 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

roboto-serif

WCAG Partial

71/100

Readability

/30

24/30

18px · LH 1.55

Hierarchy

/20

15/20

2.55x ratio

WCAG

/25

17/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 1 req

Heading Font

roboto-serif

Serif46px

Body Font

roboto-serif

Serif18px

Contrast Ratio

1:1

15 issues

Reading Comfort

~34 CPL

Narrow lines

46px

34px

23px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.55 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Buy on MyFontsFlesch 34

Color Palette

14 unique colors

17.23:1 AAA Dark

#1e1a1b

Text· 15.4%

#ffffff

Text· 10.1%

#0051a0

Primary· 19.1%

#b0886d

Secondary· 7.7%

#733e42

Secondary· 7.3%

#d9c5af

Secondary· 6.9%

#3e77ad

Secondary· 6.8%

#4b5a97

Secondary· 5.3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nhd.org(6)cdnjs.cloudflare.com(3)connect.facebook.net(2)cdn-cookieyes.com(2)ajax.googleapis.com(1)

Website Identity

National History Day

Organization

National History Day forms thoughtful citizens and confident teachers by improving the teaching and learning of history.

nhd.org/en/

23 years old

Location detected: 🇨🇦 Canadavia ip

Network Solutions, LLC📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 10 May 2026 at 15:33

Historical Analysis & Change Tracking