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offenbach.de

https://offenbach.de· First analyzed 03 May 2026· Updated 03 May 2026
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offenbach.de
Desktop screenshot of offenbach.de
Mobile screenshot of offenbach.de
Mobile

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Hosting Provider

1&1 Versatel Deutschland GmbH

IP Address

104.151.107.134

Site Location

🇩🇪 Germanyvia phone

Server Location

🇩🇪 Dortmund, Germany

ASN

AS8881

Organization

1&1 Versatel Deutschland GmbH

Server

Apache

Nameservers

ns3.knipp.de.anycast102.irondns.net.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
89 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
1&1 Versatel Deutschland GmbH

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

B73/100
20
7
1
Meta Tags11/15
Content10/12
Headings3/8
Technical22/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
O
offenbach.deoffenbach.de

Startseite | Stadt Offenbach am Main

Wo der Main seinen schönsten Bogen macht, liegt Offenbach. Eine Stadt voller Spannung und auf dem Sprung.

Title Length36 chars

Recommended: 50-60 chars (~225px / 580px)

Description Length105 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

1 URLs

1 sub-sitemaps

robots.txt

81 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

20/100
Needs Work
6 9 2

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AI & LLM Readiness

D45/100
Bot Access
19/25
Machine Read.
9/25
Schema Data
1/25
Citation
16/25

AI Bot Access

13/14 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:4%
Words:935
Token eff.:Optimal
Sections/1K:11.8

Structured Data

1 JSON-LD
BreadcrumbList

Citation Readiness

Opening Summary44w
Descriptive Headingsavg 3.5w
Canonical URL
Open Graph3/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
A
81/100
13
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
13/20
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
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
5/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 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.
54/100
C
195 mg
CO₂e / view
1.5 MB
Page Weight
60%
Cleaner Than
New Visitor
223 mg
vs
Returning (cached)
112 mg
Annual (10K/mo)
23.4 kg
Emission Segments
Data Center
44 mg
Network
47 mg
Device
105 mg
Resource Breakdown
JavaScript
490.0 KB
Images
677.5 KB
CSS
389.5 KB
HTML
20.5 KB
Other
636 B
Green Hosting Not Verified
1&1 Versatel Deutschland GmbH
4 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

76%Good
Interactive

HTTPS

No WAF

65d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

08.04.2026

Valid Until

07.07.2026

Subject Alternative Names (20)

capitol-of.decapitol-online.dee-wie-offenbach.deeventlocation-rhein-main.deies.offenbach.deoffenbach.depreview.offenbach.desana-sportpark.de+12 more

SHA-256 Fingerprint

3E:FA:90:34:7F:59:32:05:A9:92:02:97:74:2E:00:71:C6:0A:D9:09...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-credentials
true
access-control-allow-headers
Content-Type, Cache-Control
cache-control
🟡 0s(max-age=0)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
20721
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mailin.offenbach.de

Domain Information

offenbach.de

Last Updated

12.08.2025

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
C
66/100
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, minimum-scale=1, user-scalable=yes
3 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Roboto

WCAG AA
69/100
Readability
/30
20/30

18px · LH 1.67

Hierarchy
/20
8/20
WCAG
/25
21/25

4.52:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Roboto

Sans

Body Font

Roboto

Sans18px

Contrast Ratio

4.52:1

WCAG AA (≥4.5:1)

Reading Comfort

~43 CPL

Narrow lines
45px
h2
24px
h3
18px
p

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

❌ Very complex text: Flesch score 14/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Fluid TypeFlesch 14

Color Palette

8 unique colors
Light
#ffffff
Background· 44.4%
#090504
Primary· 20%
#07b8fe
Primary· 18.2%
#2c0e07
Accent· 5.8%
#6e593f
Secondary· 4.3%
#88cde3
Accent· 3.4%
#44a9cc
Accent· 2%
#fff5cb
Accent· 1.9%

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

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Scripts & Styles

9 Resources

7
Scripts
2
Styles
4
Async
1
Defer

Top Script Sources

local(4)offenbach.de(3)

Website Identity

offenbach.de

+496980651
Location detected: 🇩🇪 Germanyvia phone
de-DE

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Last analyzed: 03 May 2026 at 01:40

Historical Analysis & Change Tracking