openusability.org

https://openusability.org· First analyzed 25 May 2026· Updated 25 May 2026

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openusability.org

Mobile

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

167.235.224.122

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

ns1.your-server.de.ns3.second-ns.de.ns.second-ns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

382 ms10%

Speed Index

497 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

72 KB

7 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Hetzner

Technology Stack

3 Technologies Detected

Libraries

jQueryv1.11.0

CSS Frameworks

Bootstrap

Web Servers

Apachev2.4.58

SEO Analysis

D51/100

Meta Tags4/15

Content12/12

Headings8/8

Technical11/21

E-E-A-T0/7

Images2/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

openusability.orgopenusability.org

Open Usability

No description available for this page.

Title Length14 chars

Recommended: 50-60 chars (~83px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

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Local SEO

Local Search Readiness

8/100

Poor

3 12 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

D40/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

0/25

Citation

6/25

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

def. listsnav

Text ratio:50%

Words:1,555

Token eff.:Optimal

Sections/1K:4.5

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary16w

Descriptive Headingsavg 5.9w

Canonical URL

Open Graph0/3

Twitter Card0/3

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.

70/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

18/20

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

3/15

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.

75/100

A+

7 mg

CO₂e / view

72.1 KB

Page Weight

95%

Cleaner Than

New Visitor

8 mg

Returning (cached)

4 mg

Annual (10K/mo)

876 g

Emission Segments

Data Center

<0.001 g

Network

2 mg

Device

5 mg

Resource Breakdown

JavaScript

40.8 KB

Images

6.0 KB

CSS

18.2 KB

HTML

7.0 KB

Green Hosting Verified

Hetzner Online GmbH

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

38d

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

04.04.2026

Valid Until

03.07.2026

Subject Alternative Names (2)

openusability.orgwww.openusability.org

SHA-256 Fingerprint

48:E2:14:58:36:7B:C8:88:98:D4:32:02:B3:9C:3A:14:42:97:63:27...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

6911

content-type

text/html

date

Mon, 25 May 2026 02:26:22 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mxext1.mailbox.org

Domain Information

openusability.org

Domain Age

22y 9m

Created

21.08.2003

Expires

21.08.2026

Last Updated

05.10.2025

Registrar

Vautron Rechenzentrum AG

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.

60/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Georgia

WCAG Partial

76/100

Readability

/30

26/30

27px · LH 1.43

Hierarchy

/20

17/20

3x ratio · ✓ H1→H6

WCAG

/25

17/25

1.26:1 min contrast

Performance

/25

16/25

1 font

Heading Font

Georgia

Serif81px

Body Font

Georgia

Serif27px

Contrast Ratio

1.26:1

4 issues

Reading Comfort

~32 CPL

Narrow lines

81px

45px

23px

27px

✅ Excellent readability: 27px body text is ideal for all devices.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.3:1).

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

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

Buy on MyFontsFlesch 42

Color Palette

6 unique colors

Dark

#222222

Other· 6.499999999999999%

#f2f5d8

Primary· 82.5%

#b9a583

Secondary· 3.6%

#d3c7a6

Secondary· 3%

#e6e1c4

Secondary· 2.8%

#7d664b

Secondary· 1.6%

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Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

ajax.googleapis.com(1)js(1)

Website Identity

openusability.org

contact@openusability.org

22 years old

Location detected: 🇩🇪 Germanyvia ip

Vautron Rechenzentrum AGen

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Last analyzed: 25 May 2026 at 02:26

Historical Analysis & Change Tracking