ensembl.org

https://ensembl.org· First analyzed 23 Apr 2026· Updated 23 Apr 2026

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ensembl.org

Mobile

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Hosting Provider

European Bioinformatics Institute

IP Address

193.62.193.83

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Cambridge, United Kingdom

ASN

AS786

Organization

European Bioinformatics Institute

Server

GitHub.com

CDN

Fastly

Nameservers

ns73.domaincontrol.com.ns74.domaincontrol.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

263 ms10%

Speed Index

342 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 KB

3 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Platform

GitHub Pages

CDN

Fastly

SEO Analysis

F32/100

Meta Tags4/15

Content5/12

Headings5/8

Technical3/21

E-E-A-T0/7

Images4/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability0/3

ensembl.orgensembl.org

Service unavailable

No description available for this page.

Title Length19 chars

Recommended: 50-60 chars (~109px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Page is set to noindex — will not appear in search results
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

15 issues found

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Crawlability

Sitemap

Type: index

22 URLs

22 sub-sitemaps

robots.txt

150 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100

Poor

1 14 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

F32/100

Bot Access

20/25

Machine Read.

8/25

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

header/footer

Text ratio:29%

Words:98

Token eff.:Too Short

Sections/1K:10

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 2w

Canonical URL

Open Graph0/3

Twitter Card0/3

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.

74/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

14/20

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

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.

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.

55/100

A+

<0.001 g

CO₂e / view

2.5 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

36 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

2.5 KB

Green Hosting Not Verified

European Bioinformatics Institute

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

39d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

01.05.2025

Valid Until

02.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.ensembl.orgensembl.org

SHA-256 Fingerprint

9D:B6:7C:43:C0:70:0D:C0:2C:2D:6C:B9:49:2D:91:A4:28:C9:EA:CE...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

2968

content-length

2218

content-type

text/html; charset=utf-8

date

Thu, 23 Apr 2026 17:51:48 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

ironport1.embl.de

ironport2.embl.de

Domain Information

ensembl.org

Domain Age

26y 3m

Created

20.01.2000

Expires

20.01.2030

Last Updated

10.12.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

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.

41/100

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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Luxi Sans

WCAG AAA

70/100

Readability

/30

18/30

14px · LH --

Hierarchy

/20

14/20

1.67x ratio

WCAG

/25

24/25

9.4:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Luxi Sans

Sans24px

Body Font

Luxi Sans

Sans14px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~42 CPL

Narrow lines

24px

18px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 49/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 49

Color Palette

6 unique colors

3.34:1 AA Large Light

#ffffff

Background· 84.4%

#898c9a

Secondary· 1.8%

#333365

Primary· 8.7%

#f0f0eb

Secondary· 2.5%

#c6bea6

Secondary· 1.9%

#434571

Secondary· 0.7%

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Website Identity

ensembl.org

26 years old

Location detected: 🇬🇧 United Kingdomvia ip

GoDaddy.com, LLC

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Last analyzed: 23 Apr 2026 at 17:52

Historical Analysis & Change Tracking