paleobiodb.org

https://paleobiodb.org· First analyzed 19 May 2026· Updated 19 May 2026

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paleobiodb.org

Mobile

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Hosting Provider

University of Wisconsin Madison

IP Address

128.104.144.189

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Madison, United States

ASN

AS59

Organization

University of Wisconsin Madison

Server

Nginx

Nameservers

ns2.dreamhost.com.ns3.dreamhost.com.ns1.dreamhost.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

677 ms10%

Speed Index

880 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

595 KB

24 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

University of Wisconsin Madison

Technology Stack

9 Technologies Detected

CSS Frameworks

Analytics

Libraries

Other

Icon Libraries

Fonts

Web Servers

SEO Analysis

D51/100

Meta Tags4/15

Content12/12

Headings3/8

Technical12/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

paleobiodb.orgpaleobiodb.org

The Paleobiology Database

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars (~148px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

11 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

12 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.

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AI & LLM Readiness

F36/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

8/25

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:19%

Words:546

Token eff.:Optimal

Sections/1K:9.2

Structured Data

No Schema

Citation Readiness

Opening Summary64w

Descriptive Headingsavg 1.8w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

57/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

7/20

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

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.

56/100

74 mg

CO₂e / view

594.7 KB

Page Weight

80%

Cleaner Than

New Visitor

84 mg

Returning (cached)

42 mg

Annual (10K/mo)

8.8 kg

Emission Segments

Data Center

16 mg

Network

18 mg

Device

40 mg

Resource Breakdown

JavaScript

99.6 KB

Images

106.5 KB

CSS

379.3 KB

Fonts

2.7 KB

HTML

3.1 KB

Other

3.5 KB

Green Hosting Not Verified

University of Wisconsin Madison

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

48d

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

07.04.2026

Valid Until

06.07.2026

Subject Alternative Names (2)

paleobiodb.orgwww.paleobiodb.org

SHA-256 Fingerprint

A0:A2:D3:3E:AB:D6:87:D8:31:61:C9:3F:DC:4D:67:10:DB:B2:F9:6C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Tue, 19 May 2026 05:29:39 GMT

etag

W/"6a0b3889-2420"

last-modified

Mon, 18 May 2026 16:04:25 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxb-007b0c01.gslb.pphosted.com

mxa-007b0c01.gslb.pphosted.com

Domain Information

paleobiodb.org

Domain Age

12y 10m

Created

02.07.2013

Expires

02.07.2026

Last Updated

06.06.2025

Registrar

DreamHost, 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.

53/100

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,maximum-scale=1

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Raleway + Helvetica Neue

WCAG Partial

61/100

Readability

/30

21/30

14px · LH 1.70

Hierarchy

/20

6/20

WCAG

/25

13/25

3.1:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Raleway

Sans

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

3.1:1

22 issues

Reading Comfort

~45 CPL

Optimal (45–75)

63px

14px

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

✅ Optimal line length: ~45 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 39/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 22 elements below WCAG AA threshold (min 3.1:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

GGoogle FontsFlesch 39

Color Palette

10 unique colors

11.97:1 AAA Light

#f8f8f8

Background· 34.699999999999996%

#323330

Text· 8.4%

#d6dfd2

Primary· 8.3%

#eeebd7

Secondary· 5.8%

#acb295

Secondary· 2.2%

#93bda6

Secondary· 1.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets(7)google-analytics.com(1)build(1)ajax.googleapis.com(1)

Website Identity

paleobiodb.org

12 years old

Location detected: 🇺🇸 United Statesvia ip

DreamHost, LLCen

Social Profiles

GitHub Bluesky

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Last analyzed: 19 May 2026 at 05:30

Historical Analysis & Change Tracking