codexsinaiticus.org

https://codexsinaiticus.org· First analyzed 11 May 2026· Updated 11 May 2026

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codexsinaiticus.org

Mobile

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Hosting Provider

Universitaet Leipzig

IP Address

139.18.15.1

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Leipzig, Germany

ASN

AS680

Organization

Universitaet Leipzig

Server

Nginx

Nameservers

ns4.demysdns.co.uk.ns5.demysdns.co.uk.ns6.demysdns.co.uk.ns0.demysdns.net.+3 more

Performance

100

Core Web Vitals

Weight

First Contentful Paint

338 ms10%

Speed Index

439 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

114 KB

23 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Universitaet Leipzig

Technology Stack

1 Technologies Detected

Web Servers

Nginx

SEO Analysis

D48/100

Meta Tags7/15

Content9/12

Headings3/8

Technical8/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

codexsinaiticus.orgcodexsinaiticus.org

Codex Sinaiticus - Home

Codex Sinaiticus is one of the most important books in the world. Handwritten well over 1600 years ago, the manuscript contains the Christian Bible in Greek,...

Description truncated.

Title Length23 chars

Recommended: 50-60 chars (~138px / 580px)

Description Length390 chars

Recommended: 120-160 chars

Issues (2)

• 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)

12 issues found

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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

F37/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

9/25

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:17%

Words:354

Token eff.:Optimal

Sections/1K:14.1

Structured Data

No Schema

Citation Readiness

Opening Summary88w

Descriptive Headingsavg 3.4w

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.

58/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

7/20

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

0/15

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.

48/100

A+

14 mg

CO₂e / view

114.4 KB

Page Weight

95%

Cleaner Than

New Visitor

16 mg

Returning (cached)

8 mg

Annual (10K/mo)

1.7 kg

Emission Segments

Data Center

3 mg

Network

3 mg

Device

8 mg

Resource Breakdown

Images

67.6 KB

CSS

33.1 KB

HTML

13.8 KB

Green Hosting Not Verified

Universitaet Leipzig

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

207d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

04.12.2025

Valid Until

04.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (10)

codexsinaiticus.orgwww.codexsinaiticus.co.ukwww.codexsinaiticus.orgwww.codexsinaiticus.ukwww.codexsinaiticus.comwww.codexsinaiticus.org.ukcodexsinaiticus.org.ukcodexsinaiticus.co.uk+2 more

SHA-256 Fingerprint

25:EB:DE:AC:E7:0F:C0:1D:4E:49:35:6D:78:0F:8B:99:71:F6:51:D8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

connection

keep-alive

content-length

13798

content-type

text/html; charset=utf-8

date

Mon, 11 May 2026 02:27:52 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

codexsinaiticus.org

Domain Age

21 years

Created

28.04.2005

Expires

28.04.2027

Last Updated

19.03.2026

Registrar

Nom-iq Ltd. dba COM LAUDE

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.

35/100

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

Verdana

WCAG Partial

47/100

Readability

/30

11/30

11px · LH --

Hierarchy

/20

8/20

WCAG

/25

14/25

1.17:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Verdana

Sans

Body Font

Verdana

Sans11px

Contrast Ratio

1.17:1

10 issues

Reading Comfort

~75 CPL

Optimal (45–75)

13px

11px

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

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

❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.2:1).

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

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

Buy on MyFontsFlesch 20

Color Palette

10 unique colors

Light

#ffffff

Background· 26.599999999999998%

#635a49

Primary· 27%

#e0dfc9

Secondary· 7.5%

#291707

Accent· 7.2%

#bec0a3

Secondary· 6.3%

#aca68e

Secondary· 6.2%

#83765b

Secondary· 5.7%

#564734

Secondary· 4.9%

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Website Identity

codexsinaiticus.org

21 years old

Location detected: 🇩🇪 Germanyvia ip

Nom-iq Ltd. dba COM LAUDEen

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Last analyzed: 11 May 2026 at 02:28

Historical Analysis & Change Tracking