nanohub.org

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

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nanohub.org

Mobile

Sponsored

Hosting Provider

Purdue University

IP Address

128.211.145.64

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 West Lafayette, United States

ASN

AS397511

Organization

Purdue University

Server

Apache

Nameservers

ns5.purdue.edu.ns3.purdue.edu.ns4.purdue.edu.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.5 s10%

Speed Index

2.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

29.1 MB

76 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Purdue University

Technology Stack

15 Technologies Detected

Analytics

Libraries

Other

UI Components

Slick Carousel Fancybox

CSS Frameworks

Fonts

Tag Managers

Web Servers

Customer Support

SEO Analysis

C60/100

Meta Tags11/15

Content11/12

Headings6/8

Technical13/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

nanohub.orgnanohub.org

nanoHUB.org - Simulation, Education, and Community for Nanotechnology

nanoHUB.org is designed to be a resource to the entire nanotechnology discovery and learning community.

Title Length69 chars

Recommended: 50-60 chars (~416px / 580px)

Description Length103 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (31/38) — critical for accessibility and SEO

8 issues found

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Crawlability

Sitemap

robots.txt

79 rules

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

F34/100

Bot Access

11/25

Machine Read.

14/25

Schema Data

0/25

Citation

9/25

AI Bot Access

5/14 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:15%

Words:1,487

Token eff.:Optimal

Sections/1K:33.6

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary193w

Descriptive Headingsavg 4.8w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

A+

91/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

18/20

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

13/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

10/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.

16/100

3.68 g

CO₂e / view

29.1 MB

Page Weight

Cleaner Than

New Visitor

4.21 g

Returning (cached)

2.10 g

Annual (10K/mo)

441.7 kg

Emission Segments

Data Center

822 mg

Network

883 mg

Device

1.98 g

Resource Breakdown

JavaScript

233.2 KB

Images

27.6 MB

CSS

1.2 MB

Fonts

2.2 KB

HTML

17.9 KB

Green Hosting Not Verified

Purdue University

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

39d

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

13.03.2026

Valid Until

11.06.2026

Subject Alternative Names (20)

bnc.nanohub.orgchipshub.orgconference.nanohub.orgeducation.nanohub.orggoodnanoguide.nanohub.orglists.nanohub.orgnanobio.nanohub.orgnanoforge.org+12 more

SHA-256 Fingerprint

96:FE:77:AD:C2:4C:32:46:22:47:F6:63:05:36:6B:5F:5B:BF:3C:F7...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-headers

Authorization, Content-Type, X-Requested-With

access-control-allow-methods

GET, POST, OPTIONS

access-control-max-age

86400

cache-control

🔴 No Cache(no-cache, private)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

Domain Information

nanohub.org

Domain Age

22y 10m

Created

27.06.2003

Expires

27.06.2029

Last Updated

23.06.2025

Registrar

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

60/100

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.

Viewport

width=device-width, initial-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

montserratultra_light + Helvetica Neue

WCAG Partial

59/100

Readability

/30

25/30

18px · LH 1.40

Hierarchy

/20

14/20

2x ratio · ✓ H1→H6

WCAG

/25

10/25

1:1 min contrast

Performance

/25

10/25

System fonts

Heading Font

montserratultra_light

Sans35px

Body Font

Helvetica Neue

Sans18px

Contrast Ratio

1:1

2 issues

Reading Comfort

~36 CPL

Narrow lines

35px

48px

28px

18px

Minor Second

Scale

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 26/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 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 2.0x larger than body text.

GGoogle Fonts Buy on MyFontsFlesch 26

Color Palette

7 unique colors

2.19:1 Fail Light

#ffffff

Primary· 51.1%

#b1afab

Other· 5.3%

#1c3a45

Secondary· 23.1%

#be5316

Accent· 6.4%

#ddddd5

Border· 6%

#4d6168

Secondary· 4.8%

#0a232a

Primary· 3.5%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

HotjarMid-Market

User behavior and product analytics

Sponsored

Scripts & Styles

29 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)static.hotjar.com(2)googletagmanager.com(2)google-analytics.com(1)script.hotjar.com(1)

Website Identity

nanohub.org

22 years old

Location detected: 🇺🇸 United Statesvia ip

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 02 May 2026 at 17:02

Historical Analysis & Change Tracking