bio2rdf.org

https://bio2rdf.org· First analyzed 24 May 2026· Updated 24 May 2026

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bio2rdf.org

Mobile

Sponsored

Hosting Provider

Universiteit Maastricht

IP Address

137.120.31.101

Site Location

🇳🇱 Netherlandsvia ip

Server Location

🇳🇱 Schimmert, Netherlands

ASN

AS1103

Organization

Universiteit Maastricht

Server

Nginx

Nameservers

ns1.genome.ulaval.ca.ns2.genome.ulaval.ca.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

266 ms10%

Speed Index

346 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

75 KB

7 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Universiteit Maastricht

Technology Stack

3 Technologies Detected

Analytics

Google Analytics

Segment

Web Servers

Nginxv1.27.0

SEO Analysis

F34/100

Meta Tags4/15

Content5/12

Headings0/8

Technical7/25

E-E-A-T0/7

Images2/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

bio2rdf.orgbio2rdf.org

Bio2RDF v2.7a

No description available for this page.

Title Length13 chars

Recommended: 50-60 chars (~76px / 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
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

28 rules

Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F7/100

Bot Access

3/25

Machine Read.

4/25

Schema Data

0/25

Citation

0/25

AI Bot Access

0/14 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:25%

Words:109

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

45/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

7/15

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.

5 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.

60/100

A+

9 mg

CO₂e / view

75.4 KB

Page Weight

95%

Cleaner Than

New Visitor

11 mg

Returning (cached)

5 mg

Annual (10K/mo)

1.1 kg

Emission Segments

Data Center

2 mg

Network

2 mg

Device

5 mg

Resource Breakdown

Images

73.1 KB

HTML

2.3 KB

Green Hosting Not Verified

Universiteit Maastricht

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.04.2026

Valid Until

05.07.2026

Subject Alternative Names (1)

bio2rdf.org

SHA-256 Fingerprint

1C:0D:7F:01:F6:D1:05:F0:A2:DD:61:B4:18:0C:F9:4E:5D:07:E5:AF...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Sun, 24 May 2026 14:31:27 GMT

etag

W/"5a00b083-106f"

last-modified

Mon, 06 Nov 2017 18:57:07 GMT

server

nginx/1.27.0

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.bio2rdf.org

Domain Information

bio2rdf.org

Domain Age

20y 6m

Created

23.11.2005

Expires

23.11.2026

Last Updated

20.10.2025

Registrar

DomainSpot LLC

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.

30/100

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.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AAA

66/100

Readability

/30

19/30

16px · LH --

Hierarchy

/20

9/20

WCAG

/25

24/25

9.4:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

Single Family

center aligned

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

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

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

✅ 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 0

Color Palette

8 unique colors

Light

#ffffff

Background· 93.69999999999999%

#e77816

Primary· 1.4%

#174e72

Accent· 1.4%

#e4e7e9

Secondary· 1.3%

#b7bed0

Secondary· 1%

#dbd1ca

Secondary· 0.7%

#ab9494

Secondary· 0.6%

#ab7040

Secondary· 0%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

google-analytics.com(1)

Website Identity

bio2rdf.org

20 years old

Location detected: 🇳🇱 Netherlandsvia ip

DomainSpot LLC

Social Profiles

X (Twitter)GitHub

Sponsored

Last analyzed: 24 May 2026 at 14:31

Historical Analysis & Change Tracking