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4teachers.de

https://4teachers.de· First analyzed 19 May 2026· Updated 19 May 2026
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4teachers.de
Desktop screenshot of 4teachers.de
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Mobile

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Hosting Provider

4teachers GmbH

IP Address

212.7.187.132

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Bergisch Gladbach, Germany

ASN

AS12360

Organization

4teachers GmbH

Server

Apache

Nameservers

ns-c.ktk.de.ns-a.ktk.de.ns-b.ktk.io.

Performance

87

Core Web Vitals

Weight

First Contentful Paint
1.7 s10%
Speed Index
2.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
115 KB
46 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
4teachers GmbH

Technology Stack

5 Technologies Detected

Libraries

2
jQueryv1.7.2
jQuery UI

Analytics

2
Google Analytics
Segment

Web Servers

1
Apache

SEO Analysis

D55/100
15
8
3
Meta Tags8/15
Content11/12
Headings6/8
Technical9/25
E-E-A-T3/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
4
4teachers.de4teachers.de

4teachers: Lehrproben, Unterrichtsentwürfe und Unterrichtsmaterial ...

4teachers beinhaltet ein Komplettangebot rund um das Lehramt. Unterrichtsentwürfe und Arbeitsmaterialien. Darüber hinaus Lehramtsreferate, Klausurfragen, Fac...

Title truncated. Description truncated.
Title Length94 chars

Recommended: 50-60 chars (~573px / 580px)

Description Length197 chars

Recommended: 120-160 chars

Issues (3)

  • • Title is too long (94 chars, ~573px). Will be truncated in search results.
  • • Most images missing alt text (27/42) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

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.

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AI & LLM Readiness

D45/100
Bot Access
20/25
Machine Read.
16/25
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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:11%
Words:665
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary11w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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.
D
48/100
10
Passed
5
Critical
3
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
0/15
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
8/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
53/100
A+
14 mg
CO₂e / view
114.5 KB
Page Weight
95%
Cleaner Than
New Visitor
16 mg
vs
Returning (cached)
8 mg
Annual (10K/mo)
1.7 kg
Emission Segments
Data Center
3 mg
Network
3 mg
Device
8 mg
Resource Breakdown
JavaScript
105.2 KB
HTML
9.3 KB
Green Hosting Not Verified
4teachers GmbH
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

189d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.05.2026

Valid Until

24.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.4teachers.de4teachers.de

SHA-256 Fingerprint

3D:73:5B:DB:26:5B:63:FD:EF:C9:33:35:08:82:3A:AA:78:ED:49:2C...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-cache, must-revalidate)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Tue, 19 May 2026 02:18:12 GMT
keep-alive
timeout=15, max=100
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mx2.4teachers.de

Domain Information

4teachers.de

Last Updated

20.02.2017

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
F
28/100
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.
5 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

verdana

WCAG Partial
53/100
Readability
/30
10/30

11px · LH 1.36

Hierarchy
/20
15/20

1.33x ratio · ✓ H1→H6

WCAG
/25
14/25

1.04:1 min contrast

Performance
/25
14/25

2 fonts

Heading Font

verdana

Sans15px

Body Font

verdana

Sans11px

Contrast Ratio

1.04:1

3 issues

Reading Comfort

~44 CPL

Narrow lines
15px
h1
11px
p

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

⚠️ Tight line spacing (1.36). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 15/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFlesch 15

Color Palette

10 unique colors
Dark
#5b5b4c
Secondary· 3.6%
#76a19a
Primary· 40.2%
#fbfbfc
Background· 17%
#fde190
Accent· 11.8%
#3b716c
Secondary· 10.7%
#e8e3d7
Secondary· 4.9%
#344f3d
Secondary· 4.2%
#a7b4a0
Secondary· 3.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

7
Scripts
1
Styles
2
Async
0
Defer

Top Script Sources

cdnjs.cloudflare.com(5)google-analytics.com(1)as.4teachers.de(1)

Website Identity

4teachers.de

Location detected: 🇩🇪 Germanyvia tld

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Last analyzed: 19 May 2026 at 02:18

Historical Analysis & Change Tracking