christophhagen.de

https://christophhagen.de· First analyzed 07 May 2026· Updated 07 May 2026

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christophhagen.de

Mobile

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.

75/100

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

5/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

9/15

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.

63/100

246 mg

CO₂e / view

2.4 MB

Page Weight

30%

Cleaner Than

New Visitor

281 mg

Returning (cached)

140 mg

Annual (10K/mo)

29.5 kg

Emission Segments

Data Center

12 mg

Network

72 mg

Device

161 mg

Resource Breakdown

JavaScript

150.7 KB

Images

291.3 KB

CSS

585.4 KB

HTML

12.3 KB

Other

1.4 MB

Green Hosting Verified

IONOS SE

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

76%Good

Static / Informational

HTTPS

No WAF

44d

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/2

Valid From

23.03.2026

Valid Until

21.06.2026

Subject Alternative Names (1)

christophhagen.de

SHA-256 Fingerprint

E9:45:E6:BD:6C:11:62:19:CD:DE:48:BD:10:77:C0:98:AD:46:90:78...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Thu, 07 May 2026 13:42:30 GMT

etag

W/"69de68ad-1120f"

last-modified

Tue, 14 Apr 2026 16:17:49 GMT

server

nginx/1.24.0 (Ubuntu)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

smtpin.rzone.de

Domain Information

christophhagen.de

Last Updated

17.09.2020

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.

55/100

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, maximum-scale=1

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Main

WCAG AA

66/100

Readability

/30

25/30

16px · LH 1.60

Hierarchy

/20

6/20

WCAG

/25

22/25

5.25:1 min contrast

Performance

/25

13/25

2 fonts · 2 req

Heading Font

Main

Sans

Body Font

Main

Sans16px

Contrast Ratio

5.25:1

WCAG AA (≥4.5:1)

Reading Comfort

~33 CPL

Narrow lines

27px

21px

16px

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

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.2:1).

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 50

Color Palette

8 unique colors

Light

#020e1a

Background· 60.00000000000001%

#041f34

Accent· 11.7%

#3472bf

Accent· 10.1%

#7e9aba

Secondary· 5.3%

#9fbcd5

Secondary· 5.1%

#395571

Secondary· 3.5%

#5e7fa7

Secondary· 2.3%

#1c3f65

Primary· 2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics