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seebruecke.org

https://seebruecke.org· First analyzed 16 May 2026· Updated 16 May 2026
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seebruecke.org
Desktop screenshot of seebruecke.org
Mobile screenshot of seebruecke.org
Mobile

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Hosting Provider

Render
render.com

IP Address

216.24.57.1

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS397273

Organization

Render

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dane.ns.cloudflare.com.eloise.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
404 ms10%
Speed Index
525 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.2 MB
55 requests

Image Optimization

ResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Platform
Render
CDN
Cloudflare

Progressive Web App

Web ManifestTheme Color

Technology Stack

4 Technologies Detected

Meta Frameworks

1
Next.js

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

CDN

1
Cloudflare

SEO Analysis

C62/100
18
6
1
Meta Tags14/15
Content8/12
Headings8/8
Technical11/21
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
S
seebruecke.orgseebruecke.org

Seebrücke - Schafft sichere Häfen! | Seebrücke

Seebrücke – eine Bewegung für sichere Fluchtwege, entkriminalisierte Seenotrettung und die menschenwürdige Aufnahme von Geflüchteten.

Title Length46 chars

Recommended: 50-60 chars (~278px / 580px)

Description Length133 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (5/6) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Local SEO

Local Search Readiness

3/100
Poor
1 14 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

D43/100
Bot Access
20/25
Machine Read.
16/25
Schema Data
0/25
Citation
7/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:6%
Words:470
Token eff.:Optimal
Sections/1K:27.7
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary17w
Descriptive Headingsavg 2.3w
Canonical URL
Open Graph0/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
B
77/100
13
Passed
2
Critical
1
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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
13/15
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.
1 recommendation
  • •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.
29/100
E
284 mg
CO₂e / view
2.2 MB
Page Weight
50%
Cleaner Than
New Visitor
324 mg
vs
Returning (cached)
162 mg
Annual (10K/mo)
34.0 kg
Emission Segments
Data Center
63 mg
Network
68 mg
Device
152 mg
Resource Breakdown
JavaScript
231.2 KB
Images
8.7 KB
CSS
200.8 KB
HTML
11.5 KB
Other
1.8 MB
Green Hosting Not Verified
Render
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

WAF

69d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

25.04.2026

Valid Until

24.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.seebruecke.org

SHA-256 Fingerprint

D5:C5:B0:EC:58:62:15:80:C7:56:05:95:C6:8B:8C:26:19:68:B7:E2...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=86400
cache-control
⚪ Custom(s-maxage=60, stale-while-revalidate)
cf-cache-status
DYNAMIC
cf-ray🇩🇪 Frankfurt
9fc8cbe8ef00371c-FRA
content-encoding
⚡ Brotli(br)
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.seebruecke.org

Domain Information

seebruecke.org

Domain Age
7y 10m

Created

28.06.2018

Expires

28.06.2028

Last Updated

24.06.2025

Registrar

Tucows Domains Inc.

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.
B
74/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Brezel + Rubik

WCAG Partial
75/100
Readability
/30
22/30

25px · LH 1.50

Hierarchy
/20
20/20

2.88x ratio · ✓ H1→H6

WCAG
/25
19/25

3.39:1 min contrast

Performance
/25
14/25

System fonts

Heading Font

Brezel

Sans72px

Body Font

Rubik

Sans25px

Contrast Ratio

3.39:1

2 issues

Reading Comfort

~35 CPL

Narrow lines
72px
h1
72px
h2
25px
p
Minor Second
Scale

✅ Excellent readability: 25px body text is ideal for all devices.

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

⚠️ Hard to read: Flesch score 43/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.4:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.9x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 43

Color Palette

9 unique colors
Dark
#2d2d2d
Other· 14.9%
#f4b510
Accent· 56.099999999999994%
#f65511
Primary· 12%
#f9f7f2
Primary· 6.3%
#8e8267
Secondary· 5.5%
#824427
Accent· 2%
#a25b36
Secondary· 1.2%
#ecbf49
Accent· 0.6%

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

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Scripts & Styles

26 Resources

20
Scripts
6
Styles
0
Async
19
Defer

Top Script Sources

local(20)

Website Identity

seebruecke.org

7 years old
Location detected: 🇺🇸 United Statesvia ip
Tucows Domains Inc.de

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Last analyzed: 16 May 2026 at 07:51

Historical Analysis & Change Tracking