tonhalle-orchester.ch

https://tonhalle-orchester.ch· First analyzed 02 Jun 2026· Updated 02 Jun 2026

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Hosting Provider

Nine Internet Solutions AG

IP Address

5.148.188.39

Site Location

🇨🇭 Switzerlandvia phone

Server Location

🇨🇭 Zurich, Switzerland

ASN

AS29691

Organization

Nine Internet Solutions AG

Server

Apache

Nameservers

ns6.nine.ch.ns5.nine.ch.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.2 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6.6 MB

59 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Nine Internet Solutions AG

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

CSS Frameworks

Libraries

Other

Analytics

Tag Managers

Web Servers

SEO Analysis

C63/100

Meta Tags14/15

Content12/12

Headings3/8

Technical19/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

tonhalle-orchester.chtonhalle-orchester.ch

Tonhalle-Orchester Zürich: Klassische Konzerte

Klassische Musik ist unsere Leidenschaft. Vom Sinfoniekonzert über Kammermusik bis zur tonhalleLATE berühren wir Sie mit unserem Klang. Mit Paavo Järvi ...

Title Length46 chars

Recommended: 50-60 chars (~274px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (28/28) — critical for accessibility and SEO

10 issues found

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Crawlability

Sitemap

Type: standard

2,418 URLs

robots.txt

19 rules

Local SEO

Local Search Readiness

16/100

Poor

5 11 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

F37/100

Bot Access

18/25

Machine Read.

10/25

Schema Data

0/25

Citation

9/25

AI Bot Access

11/14 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:5%

Words:1,045

Token eff.:Optimal

Sections/1K:6.7

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary11w

Descriptive Headingsavg 3.4w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

53/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

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

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 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.

23/100

839 mg

CO₂e / view

6.6 MB

Page Weight

Cleaner Than

New Visitor

959 mg

Returning (cached)

480 mg

Annual (10K/mo)

100.7 kg

Emission Segments

Data Center

187 mg

Network

201 mg

Device

450 mg

Resource Breakdown

JavaScript

225.6 KB

Images

1.6 MB

CSS

4.7 MB

HTML

17.3 KB

Green Hosting Not Verified

Nine Internet Solutions AG

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

31%Critical

Interactive

HTTPS

No WAF

71d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.05.2026

Valid Until

13.08.2026

Subject Alternative Names (20)

tonhalle-am-see.chtonhalle-orchester.chtonhalle-orchester.orgtonhalle-zurich.chtonhalle.chtonhalleamsee.chtonhallelate.chtonhalleorchester.ch+12 more

SHA-256 Fingerprint

CD:D4:CB:F1:65:D4:F4:89:A1:79:F9:9D:4A:39:6F:B9:63:3D:76:E0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-length

17444

content-type

text/html; charset=UTF-8

date

Tue, 02 Jun 2026 10:09:37 GMT

etag

"1f9a1-653428205e25f-gzip"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

tonhalle-orchester.ch

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

73/100

Mobile Friendly9 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

NeueMontreal-Bold + NeueMontreal-Regular

WCAG Partial

55/100

Readability

/30

21/30

15px · LH 1.53

Hierarchy

/20

8/20

WCAG

/25

13/25

1:1 min contrast

Performance

/25

13/25

2 fonts · 6 req

Heading Font

NeueMontreal-Bold

Sans

Body Font

NeueMontreal-Regular

Sans15px

Contrast Ratio

1:1

17 issues

Reading Comfort

Dual Sans-Serif

left aligned

40px

28px

20px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.53 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 1.0:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 34

Color Palette

8 unique colors

12.01:1 AAA Light

#ffffff

Primary· 45.49999999999999%

#3c3533

Secondary· 3.4%

#042b31

Accent· 9.9%

#c79c88

Secondary· 6.4%

#516866

Secondary· 4%

#f2d9ca

Accent· 3.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)cdnjs.cloudflare.com(2)

Website Identity

tonhalle-orchester.ch

[email protected]

+41 44 206 34 34

Location detected: 🇨🇭 Switzerlandvia phone

Social Profiles

Facebook Instagram LinkedIn YouTube TikTok

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Last analyzed: 02 Jun 2026 at 10:09

Historical Analysis & Change Tracking