kobv.de

https://kobv.de· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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kobv.de

Mobile

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Hosting Provider

Konrad-Zuse-Zentrum fuer Informationstechnik Berlin

IP Address

130.73.102.120

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Konrad-Zuse-Zentrum fuer Informationstechnik Berlin

Server

Apache

Nameservers

dns-3.dfn.de.dns-2.dfn.de.ns2.zib.de.dns-1.dfn.de.+1 more

Performance

100

Core Web Vitals

Weight

First Contentful Paint

607 ms10%

Speed Index

789 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.3 MB

32 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Themify Metrov7.6.0Custom

by Themify

View Theme

Technology Stack

7 Technologies Detected

Libraries

jQueryv3.7.1

Slick Carousel

Plugins

Slicknav Mobile Menu Themify Shortcodes

Other

Lottie

CSS Frameworks

Tailwind CSS

Web Servers

Apachev2.4.66

SEO Analysis

B77/100

Meta Tags10/15

Content8/12

Headings8/8

Technical23/25

E-E-A-T7/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness4/4

Mobile1/4

Indexability3/3

kobv.dekobv.de

KOBV – Kooperativer Bibliotheksverbund Berlin-Brandenburg

No description available for this page.

Title Length57 chars

Recommended: 50-60 chars (~343px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

8 issues found

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Crawlability

Sitemap

Type: index

15 URLs

15 sub-sitemaps

robots.txt

5 rules

Local SEO

Local Search Readiness

5/100

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

D59/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

12/25

Citation

16/25

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

navheader/footer

Text ratio:4%

Words:378

Token eff.:Optimal

Sections/1K:21.2

Depth:2/5

Structured Data

7 JSON-LD

Article×1.2Person×1.3Organization×1.1WebSiteSearchAction

Citation Readiness

Opening Summary21w

Descriptive Headingsavg 3.7w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

17/20

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.

3 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

168 mg

CO₂e / view

1.3 MB

Page Weight

70%

Cleaner Than

New Visitor

191 mg

Returning (cached)

96 mg

Annual (10K/mo)

20.1 kg

Emission Segments

Data Center

37 mg

Network

40 mg

Device

90 mg

Resource Breakdown

JavaScript

61.0 KB

Images

1.2 MB

CSS

85.4 KB

HTML

13.3 KB

Green Hosting Not Verified

Konrad-Zuse-Zentrum fuer Informationstechnik Berlin

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

66%Fair

Interactive

HTTPS

No WAF

212d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

26.11.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.kobv.de

SHA-256 Fingerprint

74:08:E1:55:8F:E5:B2:87:EA:50:BC:DA:59:BA:36:58:55:53:ED:86...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

13369

content-security-policy

frame-ancestors 'self';

content-type

text/html; charset=UTF-8

date

Tue, 28 Apr 2026 04:17:23 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mailer01-a.zib.de

mailer01-b.zib.de

mailer01.zib.de

Domain Information

kobv.de

Last Updated

01.07.2024

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

76/100

Mobile Friendly7 breakpoints

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, minimum-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

69/100

Readability

/30

20/30

14px · LH 1.50

Hierarchy

/20

16/20

2.1x ratio · ✓ H1→H6

WCAG

/25

15/25

1:1 min contrast

Performance

/25

18/25

1 font · 1 req

Heading Font

Open Sans

Sans30px

Body Font

Open Sans

Sans14px

Contrast Ratio

1:1

16 issues

Reading Comfort

~37 CPL

Narrow lines

30px

16px

19px

14px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 4/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 4

Color Palette

12 unique colors

11.68:1 AAA Light

#ffffff

Background· 45%

#333a35

Other· 6%

#b3e1ec

Primary· 7.4%

#1b1a14

Secondary· 5.9%

#af575e

Secondary· 3.4%

#d7e4df

Secondary· 1.3%

#92cfbf

Secondary· 1.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Feedback & Surveys

TypeformSMB

Survey and feedback collection tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

kobv.de(8)cdnjs.cloudflare.com(1)(1)

Website Identity

kobv.de

kobv-zt@zib.de

Location detected: 🇩🇪 Germanyvia tld

Social Profiles

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Last analyzed: 28 Apr 2026 at 04:17

Historical Analysis & Change Tracking