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pei.de

https://pei.de· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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pei.de
Desktop screenshot of pei.de
Mobile screenshot of pei.de
Mobile

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Hosting Provider

Itzbund

IP Address

80.245.144.207

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS35704

Organization

Itzbund

Server

Apache

Nameservers

sv-spam-01.pei.de.sv-avw-02.pei.de.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
755 ms10%
Speed Index
982 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.6 MB
50 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Itzbund

Technology Stack

3 Technologies Detected

CSS Frameworks

2
Tailwind CSS
Normalize.css

Web Servers

1
Apache

SEO Analysis

C65/100
18
8
0
Meta Tags8/15
Content11/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
P
pei.depei.de

Startseite - Paul-Ehrlich-Institut

Startseite

Title Length36 chars

Recommended: 50-60 chars (~210px / 580px)

Description Length10 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    10 URLs

    10 sub-sitemaps

    robots.txt

    9 rules

    Sitemap reference found

    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.

    Sponsored

    AI & LLM Readiness

    D42/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    0/25
    Citation
    9/25

    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
    navheader/footer
    Text ratio:8%
    Words:646
    Token eff.:Optimal
    Sections/1K:68.1
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary23w
    Descriptive Headingsavg 2.3w
    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...
    Upgrade to view recommendations

    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.
    B
    79/100
    13
    Passed
    2
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    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
    4/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    20/100
    E
    326 mg
    CO₂e / view
    2.6 MB
    Page Weight
    30%
    Cleaner Than
    New Visitor
    373 mg
    vs
    Returning (cached)
    187 mg
    Annual (10K/mo)
    39.2 kg
    Emission Segments
    Data Center
    73 mg
    Network
    78 mg
    Device
    175 mg
    Resource Breakdown
    JavaScript
    757.6 KB
    Images
    1.1 MB
    CSS
    593.1 KB
    HTML
    63.6 KB
    Other
    64.1 KB
    Green Hosting Not Verified
    Itzbund
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    81%Very Good
    Interactive

    HTTPS

    No WAF

    176d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    D-Trust GmbH

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-512 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    04.04.2026

    Valid Until

    19.10.2026

    Subject Alternative Names (4)

    www.pei.dewww.pei.bund.depei.depei.bund.de

    SHA-256 Fingerprint

    26:0D:22:EB:06:54:47:59:99:93:2D:DB:E9:13:A4:32:E9:B8:C6:32...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    https://pei-portal.rexx-systems.com;
    cache-control
    🟡 60s(max-age=60)
    connection
    Keep-Alive
    content-language
    de-DE
    content-security-policy
    default-src 'self'; base-uri 'self'; style-src 'self' 'unsaf...
    content-type
    text/html;charset=utf-8
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    50

    SPF
    DKIM
    DMARC

    MX Records (2)

    sv-avw-02.pei.de
    sv-spam-01.pei.de

    Domain Information

    pei.de

    Last Updated

    22.12.2023

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    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.
    C
    61/100
    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=1.5, user-scalable=1
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Roboto Slab + Asap

    WCAG Partial
    59/100
    Readability
    /30
    22/30

    17px · LH 1.76

    Hierarchy
    /20
    9/20

    1.76x ratio

    WCAG
    /25
    17/25

    1.43:1 min contrast

    Performance
    /25
    11/25

    2 fonts · 5 req

    Heading Font

    Roboto Slab

    Sans30px

    Body Font

    Asap

    Sans17px

    Contrast Ratio

    1.43:1

    6 issues

    Reading Comfort

    ~61 CPL

    Optimal (45–75)
    30px
    h1
    26px
    h2
    32px
    h3
    17px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 17px body text is ideal for all devices.

    ✅ Optimal line length: ~61 chars/line (ideal 45–75 CPL).

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.4:1).

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

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

    Buy on MyFontsFlesch 0

    Color Palette

    8 unique colors
    4.8:1 AA Light
    #ffffff
    Background· 30.299999999999997%
    #6f727d
    Other· 7.3%
    #01305c
    Primary· 17.999999999999996%
    #433a49
    Text· 6.8%
    #5b1525
    Accent· 6%

    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

    Sponsored

    Scripts & Styles

    8 Resources

    1
    Scripts
    7
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    SiteGlobals(1)

    Website Identity

    pei.de

    Location detected: 🇩🇪 Germanyvia tld
    de

    Social Profiles

    X (Twitter)

    Sponsored

    Last analyzed: 25 Apr 2026 at 22:26

    Historical Analysis & Change Tracking