sonicvisualiser.org

https://sonicvisualiser.org· First analyzed 16 May 2026· Updated 16 May 2026

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sonicvisualiser.org

Mobile

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

195.201.35.235

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner Online GmbH

Server

Apache

Nameservers

c.ns.joker.com.b.ns.joker.com.a.ns.joker.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

326 ms10%

Speed Index

424 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.5 MB

6 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Hetzner

Technology Stack

1 Technologies Detected

Web Servers

Apachev2.4.41

SEO Analysis

D52/100

Meta Tags7/15

Content10/12

Headings8/8

Technical6/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

sonicvisualiser.orgsonicvisualiser.org

Sonic Visualiser

Sonic Visualiser is a program for viewing and analysing the contents of music audio files.

Title Length16 chars

Recommended: 50-60 chars (~90px / 580px)

Description Length90 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

Upgrade to view details

Local SEO

Local Search Readiness

0/100

Poor

15 2

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

Sponsored

AI & LLM Readiness

D40/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

0/25

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:46%

Words:309

Token eff.:Optimal

Sections/1K:3.2

Structured Data

No Schema

Citation Readiness

Opening Summary53w

Descriptive Headingsavg 8w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

71/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

11/20

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

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.

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.

38/100

362 mg

CO₂e / view

3.5 MB

Page Weight

15%

Cleaner Than

New Visitor

414 mg

Returning (cached)

207 mg

Annual (10K/mo)

43.4 kg

Emission Segments

Data Center

18 mg

Network

106 mg

Device

238 mg

Resource Breakdown

Images

3.5 MB

CSS

16.3 KB

HTML

2.2 KB

Green Hosting Verified

Hetzner Online GmbH

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

45d

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/1.1

Valid From

02.04.2026

Valid Until

01.07.2026

Subject Alternative Names (4)

sonicvisualiser.comsonicvisualiser.orgwww.sonicvisualiser.comwww.sonicvisualiser.org

SHA-256 Fingerprint

60:D2:BC:42:67:9D:B4:A3:30:E5:D4:8E:1C:96:CD:1A:A2:B2:95:49...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

1906

content-type

text/html

date

Sat, 16 May 2026 19:35:37 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.joker.com

Domain Information

sonicvisualiser.org

Domain Age

20 years

Created

12.05.2006

Expires

12.05.2027

Last Updated

20.08.2025

Registrar

CSL Computer Service Langenbach GmbH d/b/a joker.com

DNSSEC

Not Enabled

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.

32/100

Not Mobile Friendly

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.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Lucida Sans Unicode

WCAG Partial

61/100

Readability

/30

17/30

15px · LH --

Hierarchy

/20

18/20

2.11x ratio · ✓ H1→H6

WCAG

/25

12/25

3.1:1 min contrast

Performance

/25

14/25

2 fonts

Heading Font

Lucida Sans Unicode

Mono32px

Body Font

Lucida Sans Unicode

Mono15px

Contrast Ratio

3.1:1

17 issues

Reading Comfort

Single Font Family

left aligned

32px

21px

15px

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

❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 3.1:1).

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

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 20

Color Palette

10 unique colors

2.15:1 Fail Light

#ffffff

Background· 64.6%

#acb2b3

Other· 4.2%

#0f305f

Accent· 6.7%

#f06a35

Primary· 6.4%

#dfdad6

Secondary· 4.7%

#778a98

Secondary· 2.7%

#853f44

Secondary· 2%

#e29070

Accent· 1.1%

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Website Identity

sonicvisualiser.org

20 years old

Location detected: 🇩🇪 Germanyvia ip

CSL Computer Service Langenbach GmbH d/b/a joker.com

Sponsored

Last analyzed: 16 May 2026 at 19:35

Historical Analysis & Change Tracking