humancellatlas.org

https://humancellatlas.org· First analyzed 14 May 2026· Updated 14 May 2026

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humancellatlas.org

Mobile

Sponsored

Hosting Provider

Sanger Centre

IP Address

193.62.203.105

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Cambridge, United Kingdom

ASN

AS786

Organization

Sanger Centre

Nameservers

dns1.sanger.ac.uk.dns4.sanger.ac.uk.dns2.sanger.ac.uk.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

537 ms10%

Speed Index

698 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.9 MB

26 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

New HCA themev3.0.1Custom

by Anne Lyle, Mark Wilson

View Theme

Technology Stack

7 Technologies Detected

Plugins

Wordpress Simple Cookie Plugin

Ewww Image Optimizer Base Theme Class Base V3

Libraries

Other

CSS Frameworks

Analytics

SEO Analysis

C66/100

Meta Tags4/15

Content11/12

Headings1/8

Technical23/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

humancellatlas.orghumancellatlas.org

Home page

No description available for this page.

Title Length9 chars

Recommended: 50-60 chars (~58px / 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 (8/12) — critical for accessibility and SEO

7 issues found

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Crawlability

Sitemap

Type: standard

318 URLs

robots.txt

5 rules

Sitemap reference found

Local SEO

Local Search Readiness

8/100

Poor

3 12 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

D47/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

4/25

Citation

13/25

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

header/footer

Text ratio:6%

Words:502

Token eff.:Optimal

Sections/1K:6

Depth:1/5

Structured Data

1 JSON-LD

Article×1.2(min)Organization×1.1

Citation Readiness

Opening Summary18w

Descriptive Headingsavg 6.7w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

61/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

9/15

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

ARIA & Roles

4/15

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

4 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.

41/100

247 mg

CO₂e / view

1.9 MB

Page Weight

50%

Cleaner Than

New Visitor

282 mg

Returning (cached)

141 mg

Annual (10K/mo)

29.6 kg

Emission Segments

Data Center

55 mg

Network

59 mg

Device

132 mg

Resource Breakdown

JavaScript

75.7 KB

Images

1.2 MB

CSS

705.4 KB

HTML

9.9 KB

Green Hosting Not Verified

Sanger Centre

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

44d

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/2

Valid From

29.03.2026

Valid Until

27.06.2026

Subject Alternative Names (20)

*.covid19cellatlas.org*.esophaguscancercellatlas.org*.gutcellatlas.org*.heartcellatlas.org*.humancellatlas.org*.kidneycellatlas.org*.lungcellatlas.org*.neuroblastomacellatlas.org+12 more

SHA-256 Fingerprint

21:3D:5F:82:B9:0B:5C:E2:DC:C1:EA:B0:11:1F:8B:CC:77:B0:D4:B4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 14 May 2026 21:37:56 GMT

last-modified

Wed, 22 Apr 2026 15:04:31 GMT

referrer-policy

strict-origin-when-cross-origin

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

humancellatlas.org

Domain Age

9y 7m

Created

22.09.2016

Expires

22.09.2028

Last Updated

24.06.2024

Registrar

Mesh Digital Limited

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.

71/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

D-DIN Bold + Montserrat

WCAG AA

60/100

Readability

/30

22/30

16px · LH 1.30

Hierarchy

/20

8/20

WCAG

/25

19/25

6.06:1 min contrast

Performance

/25

11/25

2 fonts · 4 req

Heading Font

D-DIN Bold

Sans

Body Font

Montserrat

Sans16px

Contrast Ratio

6.06:1

WCAG AA (≥4.5:1)

Reading Comfort

~33 CPL

Narrow lines

20px

16px

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

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.1:1).

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

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

Buy on MyFontsFlesch 42

Color Palette

10 unique colors

Light

#ffffff

Background· 84.80000000000001%

#31569c

Primary· 2.1%

#688ab2

Secondary· 2.1%

#10172d

Secondary· 1.9%

#78abcf

Secondary· 1.4%

#adb3c4

Secondary· 1.3%

#4d6794

Secondary· 1.2%

#dbdee2

Secondary· 1.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)

Website Identity

humancellatlas.org

hca@humancellatlas.org

9 years old

Location detected: 🇬🇧 United Kingdomvia ip

Mesh Digital Limited📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)LinkedIn Bluesky

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Last analyzed: 14 May 2026 at 21:38

Historical Analysis & Change Tracking