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linux-tage.de

https://linux-tage.de· First analyzed 19 May 2026· Updated 19 May 2026
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linux-tage.de
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Hosting Provider

Hetzner
hetzner.com

IP Address

167.235.192.213

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

robotns3.second-ns.com.ns1.first-ns.de.robotns2.second-ns.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
591 ms10%
Speed Index
768 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.4 MB
28 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Hetzner

Technology Stack

5 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Libraries

1
jQuery

Icon Libraries

1
Font Awesome

Web Servers

1
Apache

SEO Analysis

D59/100
16
10
1
Meta Tags12/15
Content10/12
Headings1/8
Technical14/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile2/4
Indexability3/3
L
linux-tage.delinux-tage.de

CLT2026 · Chemnitz Linux Days 2026

The Chemnitzer Linux-Tage are an event across the subjects linux and open source for everybody. It brings together linux users, experts, and companies.

Title Length34 chars

Recommended: 50-60 chars (~209px / 580px)

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

11 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

5/100
Poor
2 13 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.
8/25
Schema Data
2/25
Citation
10/25

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
header/footer
Text ratio:7%
Words:304
Token eff.:Optimal
Sections/1K:36.2
Depth:1/5

Structured Data

Microdata
WebSitemicrodata

Citation Readiness

Opening Summary27w
Descriptive Headingsavg 1.5w
Canonical URL
Open Graph3/3
Twitter Card3/3
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.
C
65/100
7
Passed
5
Critical
1
Warnings
Images & Alt Text
15/20
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
0/15
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.
58/100
B
145 mg
CO₂e / view
1.4 MB
Page Weight
60%
Cleaner Than
New Visitor
166 mg
vs
Returning (cached)
83 mg
Annual (10K/mo)
17.4 kg
Emission Segments
Data Center
7 mg
Network
43 mg
Device
95 mg
Resource Breakdown
JavaScript
184.6 KB
Images
794.0 KB
CSS
451.7 KB
HTML
4.3 KB
Other
1.1 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

86%Very Good
Static / Informational

HTTPS

No WAF

30d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (3072 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

21.03.2026

Valid Until

19.06.2026

Subject Alternative Names (1)

chemnitzer.linux-tage.de

SHA-256 Fingerprint

BA:09:58:08:F6:24:F2:30:95:14:61:93:B0:B5:89:9F:6F:AA:2D:E6...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-language
en
content-length
4104
content-security-policy
frame-ancestors
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.in-chemnitz.de

Domain Information

linux-tage.de

Last Updated

17.05.2022

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
D
53/100
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=1.0, maximum-scale=3.0
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Kreon + Open Sans

WCAG Partial
56/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
16/25

1.25:1 min contrast

Performance
/25
7/25

3 fonts · 5 req

Heading Font

Kreon

Sans

Body Font

Open Sans

Sans16px

Contrast Ratio

1.25:1

8 issues

Reading Comfort

~36 CPL

Narrow lines
24px
h3
18px
h4
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.2:1).

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

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

Buy on MyFontsFlesch 65

Color Palette

10 unique colors
14.55:1 AAA Light
#ffffff
Background· 31.900000000000002%
#28292c
Primary· 9.1%
#4486ac
Primary· 38.2%
#e8e6d7
Secondary· 6.6%
#5e9db1
Secondary· 4.5%
#c0bf9d
Secondary· 3.9%
#505466
Secondary· 2.5%
#daebf0
Secondary· 1.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

13 Resources

7
Scripts
6
Styles
4
Async
0
Defer

Top Script Sources

chemnitzer.linux-tage.de(7)

Website Identity

linux-tage.de

info@linux-tage.de
Location detected: 🇩🇪 Germanyvia tld
en

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Last analyzed: 19 May 2026 at 02:09

Historical Analysis & Change Tracking