uwe-sieber.de

https://uwe-sieber.de· First analyzed 11 May 2026· Updated 11 May 2026

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uwe-sieber.de

Mobile

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Hosting Provider

IONOS (1&1)

ionos.com

IP Address

217.160.0.237

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Essen, Germany

ASN

AS8560

Organization

Ionos Inf

Server

Apache

Nameservers

ns1088.ui-dns.biz.ns1088.ui-dns.de.ns1088.ui-dns.org.ns1088.ui-dns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

253 ms10%

Speed Index

329 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

8 KB

3 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

IONOS (1&1)

Technology Stack

1 Technologies Detected

Web Servers

Apache

SEO Analysis

F34/100

Meta Tags5/15

Content4/12

Headings0/8

Technical6/25

E-E-A-T3/7

Images1/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

uwe-sieber.deuwe-sieber.de

Uwe Sieber's Homepage

Tools and Utilities for Windows and MS-DOS

Title Length21 chars

Recommended: 50-60 chars (~131px / 580px)

Description Length42 chars

Recommended: 120-160 chars

Issues (4)

• Very thin content (24 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (2/2) — critical for accessibility and SEO

15 issues found

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Crawlability

Sitemap

robots.txt

19 rules

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.

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AI & LLM Readiness

F24/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

3/25

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:4%

Words:21

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

3/20

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.

3 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.

76/100

A+

<0.001 g

CO₂e / view

7.7 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

96 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

Images

6.3 KB

HTML

1.4 KB

Green Hosting Verified

IONOS SE

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

317d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.03.2026

Valid Until

24.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.uwe-sieber.deuwe-sieber.de

SHA-256 Fingerprint

8C:DF:8D:64:1A:77:32:B1:5F:68:F2:2F:D1:E6:B5:AD:48:53:6F:E1...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Mon, 11 May 2026 06:48:53 GMT

etag

W/"c07-61516674fa2c0"

last-modified

Tue, 02 Apr 2024 05:30:27 GMT

server

Apache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx00.ionos.de

mx01.ionos.de

Domain Information

uwe-sieber.de

Last Updated

17.08.2018

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.

29/100

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

Verdana

WCAG Partial

55/100

Readability

/30

14/30

13px · LH --

Hierarchy

/20

10/20

WCAG

/25

17/25

1.46:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Verdana

Body Font

Verdana

Sans13px

Contrast Ratio

1.46:1

3 issues

Reading Comfort

Single Family

left aligned

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.5:1).

✅ Lean font stack: 1 font families keeps load times fast.

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

Buy on MyFonts

Color Palette

9 unique colors

Light

#c0c0c0

Other· 61.49999999999999%

#ffffe7

Primary· 21.299999999999997%

#000096

Accent· 6.6%

#e7ffff

Accent· 6.3999999999999995%

#430f63

Accent· 2%

#a896a9

Secondary· 1.3%

#e7ebe0

Secondary· 0.7%

#e2c0bd

Secondary· 0.1%

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Website Identity

uwe-sieber.de

Location detected: 🇩🇪 Germanyvia tld

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Last analyzed: 11 May 2026 at 06:49

Historical Analysis & Change Tracking