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bsi.de

https://bsi.de· First analyzed 05 May 2026· Updated 05 May 2026
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bsi.de
Desktop screenshot of bsi.de
Mobile screenshot of bsi.de
Mobile

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Hosting Provider

Itzbund

IP Address

80.245.144.218

Site Location

🇩🇪 Bonn, Germanyvia schema_nap

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS35704

Organization

Itzbund

Server

Apache

Nameservers

xenon.bund.de.bamberg.bund.de.nuernberg.bund.de.dns-1.dfn.de.+1 more

Performance

99

Core Web Vitals

Weight

First Contentful Paint
726 ms10%
Speed Index
944 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
6.2 MB
107 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Itzbund

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

A82/100
25
3
1
Meta Tags14/15
Content12/12
Headings6/8
Technical20/25
E-E-A-T5/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness2/4
Mobile4/4
Indexability3/3
B
bsi.debsi.de

BSI - Bundesamt für Sicherheit in der Informationstechnik

Das Bundesamt für Sicherheit in der Informationstechnik (BSI) ist die Cyber-Sicherheitsbehörde des Bundes und Gestalter einer sicheren Digitalisierung in Deu...

Description truncated.
Title Length59 chars

Recommended: 50-60 chars (~356px / 580px)

Description Length166 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (64/99) — critical for accessibility and SEO

4 issues found

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Crawlability

Sitemap

Type: index

6 URLs

6 sub-sitemaps

robots.txt

12 rules

Sitemap reference found

Local SEO

Local Search Readiness

31/100
Needs Work
9 10 1

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AI & LLM Readiness

D47/100
Bot Access
20/25
Machine Read.
14/25
Schema Data
1/25
Citation
12/25

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
blockquotesnav
Text ratio:12%
Words:2,170
Token eff.:Optimal
Sections/1K:16.6
Depth:2/5

Structured Data

1 JSON-LD
sameAs entity links

Citation Readiness

Opening Summary12w
Descriptive Headingsavg 2.5w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (6)
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.
A
84/100
14
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
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
7/15
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.
12/100
F
789 mg
CO₂e / view
6.2 MB
Page Weight
5%
Cleaner Than
New Visitor
902 mg
vs
Returning (cached)
451 mg
Annual (10K/mo)
94.7 kg
Emission Segments
Data Center
176 mg
Network
189 mg
Device
424 mg
Resource Breakdown
JavaScript
1.5 MB
Images
3.7 MB
CSS
793.9 KB
HTML
140.3 KB
Other
117.7 KB
Green Hosting Not Verified
Itzbund
8 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

81%Very Good
Interactive

HTTPS

No WAF

166d

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

03.04.2026

Valid Until

18.10.2026

Subject Alternative Names (13)

www.bsi.bund.dewww.vpki.bund.dewww.buerger-cert.dewww.bsi-fuer-buerger.dewww.bsi.dewww.baond.bund.devpki.bund.dereports.cert-bund.de+5 more

SHA-256 Fingerprint

F3:3B:6C:31:74:9F:58:6E:1E:B4:48:DA:82:E0:37:E8:CA:6F:90:41...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 60s(max-age=60)
connection
Keep-Alive
content-language
de
content-security-policy
base-uri 'self'; style-src 'self'; connect-src 'self' *.itzb...
content-type
text/html;charset=utf-8
date
Tue, 05 May 2026 02:25:45 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx2.bund.de
mx1.bund.de

Domain Information

bsi.de

Last Updated

21.04.2026

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
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

bundesserifweb + bundessansweb

WCAG Partial
66/100
Readability
/30
24/30

16px · LH 1.50

Hierarchy
/20
8/20

1.88x ratio

WCAG
/25
16/25

2.43:1 min contrast

Performance
/25
18/25

2 fonts · 5 req

Heading Font

bundesserifweb

Serif30px

Body Font

bundessansweb

Sans16px

Contrast Ratio

2.43:1

2 issues

Reading Comfort

~38 CPL

Narrow lines
30px
h1
30px
h2
24px
h3
13px
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).

❌ Very complex text: Flesch score 2/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 2.4:1).

❌ 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 2

Color Palette

12 unique colors
Light
#ffffff
Primary· 62.6%
#4fc8e2
Accent· 8.2%
#c258bd
Secondary· 5.5%
#60a9db
Accent· 4.1%
#e4e8ea
Secondary· 4%
#b2a6c0
Secondary· 3.5%
#7d6bb1
Secondary· 2.4%
#7bc3dc
Accent· 2.2%

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

9 Resources

1
Scripts
8
Styles
0
Async
0
Defer

Top Script Sources

SiteGlobals(1)

Website Identity

Bundesamt für Sicherheit in der Informationstechnik

Bundesamt für Sicherheit in der Informationstechnik

GovernmentOrganization

Das Bundesamt für Sicherheit in der Informationstechnik ist eine Bundesoberbehörde im Geschäftsbereich des Bundesministeriums des Innern, für Bau und Heimat mit Sitz in Bonn, die für Fragen der IT-Sicherheit zuständig ist.

service-center@bsi.bund.de
0800 274 1000
www.bsi.bund.de

Godesberger Allee 87, Bonn

53175, Bonn, NRW

DE

Location detected: 🇩🇪 Germany, Bonnvia schema_nap
de

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Last analyzed: 05 May 2026 at 02:26

Historical Analysis & Change Tracking