re3data.org

https://re3data.org· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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re3data.org

Mobile

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Hosting Provider

Karlsruhe Institute of Technology

IP Address

129.13.130.200

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Eggenstein-Leopoldshafen, Germany

ASN

AS34878

Organization

Karlsruhe Institute of Technology

Server

Apache

Nameservers

ns1.bringe.net.ns2.bringe.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

563 ms10%

Speed Index

732 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

844 KB

18 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Karlsruhe Institute of Technology

Technology Stack

4 Technologies Detected

Other

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

D42/100

Meta Tags4/15

Content10/12

Headings1/8

Technical8/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

re3data.orgre3data.org

Home | re3data.org

No description available for this page.

Title Length18 chars

Recommended: 50-60 chars (~110px / 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)

14 issues found

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Crawlability

Sitemap

Type: standard

3,494 URLs

robots.txt

5 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.

4/25

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

nav

Text ratio:9%

Words:256

Token eff.:Too Short

Sections/1K:23.4

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary35w

Descriptive Headingsavg 3.8w

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.

58/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

6/20

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

3/15

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.

50/100

104 mg

CO₂e / view

843.6 KB

Page Weight

80%

Cleaner Than

New Visitor

119 mg

Returning (cached)

60 mg

Annual (10K/mo)

12.5 kg

Emission Segments

Data Center

23 mg

Network

25 mg

Device

56 mg

Resource Breakdown

JavaScript

190.3 KB

Images

26.3 KB

CSS

621.2 KB

HTML

5.7 KB

Green Hosting Not Verified

Karlsruhe Institute of Technology

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

57d

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

29.03.2026

Valid Until

27.06.2026

Subject Alternative Names (1)

www.re3data.org

SHA-256 Fingerprint

E1:C9:26:8A:F6:80:26:16:89:A9:CC:BA:C6:6D:94:34:C1:54:D2:42...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, must-revalidate, private)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

5587

content-type

text/html; charset=UTF-8

date

Thu, 30 Apr 2026 22:48:29 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

mail1.bringe.net

mail2.bringe.net

mail3.bringe.net

Domain Information

re3data.org

Domain Age

14y 6m

Created

26.10.2011

Expires

26.10.2026

Last Updated

10.12.2025

Registrar

InterNetX GmbH

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.

46/100

Not 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.

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica Neue

WCAG Partial

60/100

Readability

/30

20/30

14px · LH 1.43

Hierarchy

/20

4/20

WCAG

/25

17/25

4.33:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Helvetica Neue

Sans

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

4.33:1

10 issues

Reading Comfort

~37 CPL

Narrow lines

30px

24px

14px

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

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 13/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 4.3:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Flesch 13

Color Palette

10 unique colors

Light

#ffffff

Background· 29.599999999999998%

#babbc6

Primary· 19.200000000000003%

#d8d9e1

Border· 15.2%

#9aacc2

Secondary· 8.7%

#7dabc7

Secondary· 7%

#61a1c2

Secondary· 6.5%

#488cab

Secondary· 4.5%

#c1cfdd

Secondary· 4.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)

Website Identity

re3data.org

14 years old

Location detected: 🇩🇪 Germanyvia ip

InterNetX GmbH

Social Profiles

X (Twitter)Bluesky

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Last analyzed: 30 Apr 2026 at 22:48

Historical Analysis & Change Tracking