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ef.de

https://ef.de· First analyzed 15 May 2026· Updated 15 May 2026
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ef.de
Desktop screenshot of ef.de
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Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.10.139

Site Location

🇩🇪 Germanyvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

pam.ns.cloudflare.com.anirban.ns.cloudflare.com.

Performance

96

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.6 MB
178 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Decoupled
Frontend
Framework
Next.js
Styling
Tailwind CSS
API
Data Source
Headless CMS
Storyblok
Infrastructure
Platform
AWS CloudFront
CDN
Cloudflare

Detected API Sources

https://a.storyblok.com/f/3411...

Technology Stack

10 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

CSS Frameworks

2
Tailwind CSS
Ant Design

Meta Frameworks

1
Next.js

Tag Managers

1
Google Tag Manager

Other

1
Optimizely

Reviews

1
Trustpilot

CDN

1
Cloudflare

SEO Analysis

B71/100
20
7
1
Meta Tags14/15
Content6/12
Headings3/8
Technical22/25
E-E-A-T2/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
E
ef.deef.de

EF - Sprachen. Bildung. Reisen. | EF Deutschland

EF bietet eine Vielzahl an Programmen: z.B. Sprachferien für Schüler, Sprachkurse im Ausland, Gap Year, Schüleraustausch oder Business-Sprachkurse!

Title Length48 chars

Recommended: 50-60 chars (~280px / 580px)

Description Length147 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

15 rules

Sitemap reference found

Local SEO

Local Search Readiness

17/100
Poor
5 11 1

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

D43/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
3/25
Citation
13/25

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:2%
Words:1,161
Token eff.:Optimal

Structured Data

Microdata
Organization×1.1microdataWebSitemicrodata

Citation Readiness

Opening Summary12w
Descriptive Headingsavg 4w
Canonical URL
Open Graph3/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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.
B
74/100
10
Passed
4
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
12/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
12/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
64/100
C
167 mg
CO₂e / view
1.6 MB
Page Weight
60%
Cleaner Than
New Visitor
190 mg
vs
Returning (cached)
95 mg
Annual (10K/mo)
20.0 kg
Emission Segments
Data Center
8 mg
Network
49 mg
Device
109 mg
Resource Breakdown
JavaScript
1.5 MB
CSS
60.5 KB
HTML
38.1 KB
Other
3.7 KB
Green Hosting Verified
Cloudflare
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

WAF

81d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

06.05.2026

Valid Until

04.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.ef.de

SHA-256 Fingerprint

3E:A0:35:0F:25:E7:18:BA:D5:66:63:F9:29:62:14:E1:90:12:59:AF...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

age
7488
alt-svc
h3=":443"; ma=86400
cache-control
🟡 1200s(max-age=1200)
cf-cache-status
DYNAMIC
cf-placement
local-CDG
cf-ray🇫🇷 Paris
9fc2931fcf6302cb-CDG
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

ef-de.mail.protection.outlook.com

Domain Information

ef.de

Last Updated

15.01.2026

DNSSEC
Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner
OneTrust
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: OneTrust
Privacy policy page linked
Data Protection Officer mentioned

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.
A
82/100
Mobile Friendly19 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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG Partial
65/100
Readability
/30
20/30

24px · LH 1.33

Hierarchy
/20
8/20
WCAG
/25
17/25

1:1 min contrast

Performance
/25
20/25

2 fonts · 5 req

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans24px

Contrast Ratio

1:1

5 issues

Reading Comfort

~32 CPL

Narrow lines
40px
h2
16px
h3
40px
h4
24px
p
Augmented Fourth
Scale

✅ Excellent readability: 24px body text is ideal for all devices.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

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

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Buy on MyFontsVariable FontsFluid Type (rem)Flesch 0

Color Palette

11 unique colors
16.78:1 AAA Light
#ffffff
Background· 76.10000000000001%
#1f1d1d
Other· 1.9%
#8dabbc
Primary· 3.4%
#f2f1ee
Secondary· 2.7%
#90d2ca
Secondary· 1.4%
#1b5889
Accent· 1%
#dbfff2
Accent· 0%

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

1
OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

A/B Testing & Optimization

1
OptimizelyEnterprise

Experimentation and conversion optimization

Reviews & Social Proof

1
TrustpilotMid-Market

Customer reviews and testimonials

6

Categories

7

Total Tools

2

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

23 Resources

20
Scripts
3
Styles
11
Async
6
Defer

Top Script Sources

local(10)connect.facebook.net(3)capi-automation.s3.us-east-2.amazonaws.com(1)googletagmanager.com(1)invitejs.trustpilot.com(1)

Website Identity

ef.de

021168857000
Location detected: 🇩🇪 Germanyvia tld
📧 Microsoft 365de

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Last analyzed: 15 May 2026 at 13:44

Historical Analysis & Change Tracking