sera.de

https://sera.de· First analyzed 21 May 2026· Updated 21 May 2026

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sera.de

Mobile

Sponsored

Hosting Provider

Mittwald CM Service GmbH und Co.

IP Address

185.233.55.238

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS15817

Organization

Mittwald CM Service GmbH und Co.

Server

Apache

Nameservers

ns1.domaindiscount24.net.ns2.domaindiscount24.net.ns3.domaindiscount24.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

545 ms10%

Speed Index

708 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

10.5 MB

38 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

TYPO3

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Matomo

Web Servers

Apache

SEO Analysis

B77/100

Meta Tags14/15

Content12/12

Headings3/8

Technical20/21

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile4/4

Indexability3/3

sera.desera.de

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Title Length43 chars

Recommended: 50-60 chars (~251px / 580px)

Description Length146 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (8/10) — critical for accessibility and SEO

7 issues found

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Local SEO

Local Search Readiness

10/100

Poor

3 13 2

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

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

3/25

Citation

17/25

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

nav

Text ratio:9%

Words:1,537

Token eff.:Optimal

Sections/1K:5.2

Depth:1/5

Structured Data

Microdata

Article×1.2microdata

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 4.1w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Sponsored

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.

56/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

2/15

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

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 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.

43/100

1.09 g

CO₂e / view

10.5 MB

Page Weight

Cleaner Than

New Visitor

1.25 g

Returning (cached)

623 mg

Annual (10K/mo)

130.8 kg

Emission Segments

Data Center

53 mg

Network

320 mg

Device

716 mg

Resource Breakdown

JavaScript

306.2 KB

Images

295.8 KB

CSS

9.9 MB

HTML

18.7 KB

Green Hosting Verified

Mittwald CM Service GmbH & Co. KG

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

23d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.06.2025

Valid Until

13.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.sera.desera.de

SHA-256 Fingerprint

EF:DA:41:B6:75:52:A1:5D:2C:D2:AC:DE:97:64:CA:DF:22:C7:1C:63...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-store, max-age=0)

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-length

18850

content-type

text/html;charset=utf-8

date

Thu, 21 May 2026 01:44:27 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (4)

mx03.hornetsecurity.com

mx01.hornetsecurity.com

mx02.hornetsecurity.com

mx04.hornetsecurity.com

Domain Information

sera.de

Last Updated

13.04.2026

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

59/100

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

Atkinson Hyperlegible

WCAG Partial

55/100

Readability

/30

19/30

14px · LH 1.84

Hierarchy

/20

8/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

14/25

1 font · 8 req

Heading Font

Atkinson Hyperlegible

Sans

Body Font

Atkinson Hyperlegible

Sans14px

Contrast Ratio

1:1

25 issues

Reading Comfort

~42 CPL

Narrow lines

30px

36px

18px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Wide line spacing (1.84). 1.4–1.6 is optimal for body text.

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 1.0:1).

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

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

Buy on MyFontsFlesch 41

Color Palette

7 unique colors

4:1 AA Large Light

#ffffff

Background· 62.900000000000006%

#7f7f7f

Other· 11.6%

#052f3d

Accent· 14%

#7c723e

Primary· 4%

#573b3c

Secondary· 3.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)

Website Identity

sera.de

Location detected: 🇩🇪 Germanyvia tld

Social Profiles

Facebook Instagram

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Last analyzed: 21 May 2026 at 01:44

Historical Analysis & Change Tracking