StackOptic
Back to Search
lernhelfer.de favicon

lernhelfer.de

https://lernhelfer.de· First analyzed 04 May 2026· Updated 04 May 2026
Export
lernhelfer.de
Desktop screenshot of lernhelfer.de
Mobile screenshot of lernhelfer.de
Mobile

Sponsored

Hosting Provider

Hetzner
hetzner.com

IP Address

88.198.15.117

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

helium.ns.hetzner.de.hydrogen.ns.hetzner.com.oxygen.ns.hetzner.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
426 ms10%
Speed Index
554 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
317 KB
18 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

D58/100
17
6
1
Meta Tags9/15
Content6/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images0/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
L
lernhelfer.delernhelfer.de

Lernhelfer – das Lernportal für alle Schulfächer von der 5. Klasse ...

Dein multimediales Lernportal von der 5. Klasse bis zum Abitur. Mit Schülerlexikon, Originalprüfungen, Klausuren und Lernkarten – im Web und als App.

Title truncated.
Title Length81 chars

Recommended: 50-60 chars (~485px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (81 chars, ~485px). Will be truncated in search results.

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

6 sub-sitemaps

robots.txt

53 rules

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.

Sponsored

AI & LLM Readiness

F39/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
12/25

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:0%
Words:99
Token eff.:Too Short
Sections/1K:100
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary67w
Descriptive Headingsavg 1.3w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
A
84/100
15
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
14/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
7/15
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.
2 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.
82/100
A+
32 mg
CO₂e / view
317.3 KB
Page Weight
90%
Cleaner Than
New Visitor
37 mg
vs
Returning (cached)
18 mg
Annual (10K/mo)
3.8 kg
Emission Segments
Data Center
2 mg
Network
9 mg
Device
21 mg
Resource Breakdown
JavaScript
165.8 KB
Images
2.9 KB
CSS
106.1 KB
HTML
42.4 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
1 recommendation
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

63d

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/2

Valid From

07.04.2026

Valid Until

06.07.2026

Subject Alternative Names (2)

lernhelfer.dewww.lernhelfer.de

SHA-256 Fingerprint

78:28:75:07:2F:20:64:F8:30:35:1F:C6:56:4C:17:16:D4:A2:D0:9F...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0)
content-encoding
📦 Gzip(gzip)
content-language
de
content-length
43159
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

25

SPF
DKIM
DMARC

Domain Information

lernhelfer.de

Last Updated

27.11.2025

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.
B
79/100
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=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Museo

WCAG Partial
78/100
Readability
/30
25/30

18px · LH 1.44

Hierarchy
/20
18/20

3.44x ratio · ✓ H1→H6

WCAG
/25
15/25

4.38:1 min contrast

Performance
/25
20/25

1 font · 3 req

Heading Font

Museo

Sans62px

Body Font

Museo

Sans18px

Contrast Ratio

4.38:1

1 issue

Reading Comfort

~31 CPL

Narrow lines
62px
h1
42px
h2
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.44 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 4.4:1).

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

✅ Strong hierarchy: Headlines are 3.4x larger than body text.

Buy on MyFontsFlesch 38

Color Palette

4 unique colors
3.33:1 AA Large Dark
#747274
Other· 3%
#d8d8d2
Other· 2.9%
#fcfcfa
Primary· 56.9%
#2b2a3a
Secondary· 37.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

7 Resources

5
Scripts
2
Styles
1
Async
1
Defer

Top Script Sources

local(4)visitors.lernhelfer.de(1)

Website Identity

lernhelfer.de

Location detected: 🇩🇪 Germanyvia tld
de

Sponsored

Last analyzed: 04 May 2026 at 19:19

Historical Analysis & Change Tracking