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tonhalle.de

https://tonhalle.de· First analyzed 24 May 2026· Updated 24 May 2026
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tonhalle.de
Desktop screenshot of tonhalle.de
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Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

18.194.114.177

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS EC2 (eu-central-1)

CDN

Cloudflare

WAF

Cloudflare

Nameservers

rob.ns.cloudflare.com.natasha.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
441 ms10%
Speed Index
573 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.6 MB
201 requests

Image Optimization

Lazy LoadResponsiveCloudinary
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
Amazon Web Services (AWS)
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

C63/100
19
9
1
Meta Tags7/15
Content8/12
Headings8/8
Technical19/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile1/4
Indexability3/3
T
tonhalle.detonhalle.de

Homepage | Tonhalle Düsseldorf

No description available for this page.

Title Length30 chars

Recommended: 50-60 chars (~180px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,256 URLs

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

12/100
Poor
3 14

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
3/25
Citation
7/25

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:1,603
Token eff.:Optimal
Sections/1K:1.2

Structured Data

1 JSON-LD
Organization×1.1
sameAs entity links

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.5w
Canonical URL
Open Graph0/3
Twitter Card3/3
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.
B
70/100
10
Passed
3
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
14/20
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
2/15
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.
60/100
D
272 mg
CO₂e / view
2.6 MB
Page Weight
30%
Cleaner Than
New Visitor
311 mg
vs
Returning (cached)
155 mg
Annual (10K/mo)
32.6 kg
Emission Segments
Data Center
13 mg
Network
80 mg
Device
179 mg
Resource Breakdown
JavaScript
412.2 KB
Images
1.6 MB
CSS
124.7 KB
HTML
23.5 KB
Other
443.0 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

153d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

25.09.2025

Valid Until

24.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.tonhalle.detonhalle.de

SHA-256 Fingerprint

45:2C:7C:A2:2A:0B:DE:AB:20:85:F3:F3:4B:AD:56:2D:84:42:7D:38...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
⚪ Custom(s-maxage=900, stale-while-revalidate)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Sun, 24 May 2026 23:02:36 GMT
etag
"iw8dxf7pxs3fq7"
vary
Accept-Encoding
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

tonhalle-de.mail.protection.outlook.com

Domain Information

tonhalle.de

Last Updated

19.03.2022

DNSSEC
Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner
Usercentrics
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Usercentrics
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
71/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

TH_Ligatura_2020

WCAG AA
78/100
Readability
/30
21/30

16px · LH 1.25

Hierarchy
/20
20/20

4.19x ratio · ✓ H1→H6

WCAG
/25
17/25

4.87:1 min contrast

Performance
/25
20/25

2 fonts · 2 req

Heading Font

TH_Ligatura_2020

Sans67px

Body Font

TH_Ligatura_2020

Sans16px

Contrast Ratio

4.87:1

WCAG AA (≥4.5:1)

Reading Comfort

~32 CPL

Narrow lines
67px
h1
19px
h2
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 12/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.9:1).

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

✅ Strong hierarchy: Headlines are 4.2x larger than body text.

Buy on MyFontsFlesch 12

Color Palette

8 unique colors
Dark
#000000
Background· 18.799999999999997%
#1b170c
Secondary· 31.1%
#ffffff
Primary· 0%
#344c36
Secondary· 20.6%
#1d291d
Secondary· 6.1%
#696c57
Secondary· 5.3%
#423a2a
Secondary· 4.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

22 Resources

20
Scripts
2
Styles
4
Async
15
Defer

Top Script Sources

local(14)app.usercentrics.eu(2)cdn.eye-able.com(2)googletagmanager.com(1)privacy-proxy.usercentrics.eu(1)

Website Identity

Tonhalle Düsseldorf

Tonhalle Düsseldorf

Organization
www.tonhalle.de
Location detected: 🇩🇪 Germanyvia tld
📧 Microsoft 365de

Social Profiles

FacebookInstagram

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Last analyzed: 24 May 2026 at 23:03

Historical Analysis & Change Tracking