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link4u.cc

https://link4u.cc· First analyzed 18 May 2026· Updated 18 May 2026
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link4u.cc
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Mobile screenshot of link4u.cc
Mobile

Sponsored

Hosting Provider

DataCamp Limited

IP Address

185.111.111.157

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS212238

Organization

DataCamp Limited

Server

BunnyCDN-DE1-1331

CDN

CDN

Nameservers

kiki.bunny.net.coco.bunny.net.

Performance

100

Core Web Vitals

Weight

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

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
DataCamp Limited
CDN
CDN

Technology Stack

6 Technologies Detected

Other

1
Chart.js

UI Components

1
Lightbox

Other

1
AOS (Animate On Scroll)

CSS Frameworks

1
Tailwind CSS

CDN

1
Bunny CDN

Libraries

1
AOS

SEO Analysis

D42/100
12
8
2
Meta Tags9/15
Content0/12
Headings5/8
Technical11/21
E-E-A-T0/7
Images1/7
Links2/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
L
link4u.cclink4u.cc

Link for You

<p><strong>本平台使用<a href="https://linkstack.org/"><strong>LinkStack</strong></a>开源系统。</strong></p> <p><strong>目前中国三大电信网络均可正常访问。</strong></p>

Title Length12 chars

Recommended: 50-60 chars (~72px / 580px)

Description Length140 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (23 words). Search engines need substantial content for ranking.
  • • Most images missing alt text (2/3) — critical for accessibility and SEO

10 issues found

Upgrade to view details

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.

Sponsored

AI & LLM Readiness

F31/100
Bot Access
20/25
Machine Read.
5/25
Schema Data
0/25
Citation
6/25

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:0%
Words:20
Token eff.:Too Short
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
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.
C
63/100
9
Passed
4
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
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
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.
60/100
B
114 mg
CO₂e / view
1.1 MB
Page Weight
70%
Cleaner Than
New Visitor
130 mg
vs
Returning (cached)
65 mg
Annual (10K/mo)
13.6 kg
Emission Segments
Data Center
6 mg
Network
33 mg
Device
75 mg
Resource Breakdown
JavaScript
429.9 KB
Images
2.8 KB
CSS
133.0 KB
HTML
4.0 KB
Other
554.2 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

74d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.05.2026

Valid Until

31.07.2026

Subject Alternative Names (1)

link4u.cc

SHA-256 Fingerprint

60:BF:DF:95:EC:EB:D0:B8:59:CB:80:B7:98:3E:1B:88:17:E7:FC:55...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
quic=":443"; ma=2592000
cache-control
🔴 No Cache(no-cache)
cdn-cache
MISS
cdn-cachedat
05/18/2026 05:10:12
cdn-edgestorageid
1328
cdn-proxyver
1.53
Good Warning Issue

Email Infrastructure

Proton Mail

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mail.protonmail.ch
mailsec.protonmail.ch

Domain Information

link4u.cc

Domain Age
2y 1m

Created

21.03.2024

Expires

21.03.2027

Last Updated

21.03.2026

Registrar

NameSilo, LLC

DNSSEC
Not Enabled

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
69/100
Mobile Friendly9 breakpoints
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, shrink-to-fit=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Inter

WCAG Partial
73/100
Readability
/30
26/30

20px · LH 1.50

Hierarchy
/20
12/20

2x ratio

WCAG
/25
15/25

3.11:1 min contrast

Performance
/25
20/25

1 font · 2 req

Heading Font

Inter

Sans40px

Body Font

Inter

Sans20px

Contrast Ratio

3.11:1

2 issues

Reading Comfort

Single Font Family

left aligned
40px
h1
24px
h4
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

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

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.1:1).

❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFonts

Color Palette

7 unique colors
Light
#ffffff
Background· 62.900000000000006%
#dee1e6
Secondary· 23.800000000000008%
#010102
Primary· 4.1%
#0d0624
Accent· 2.8%
#300763
Primary· 2.6%
#92adca
Secondary· 2.2%
#5a3d8e
Secondary· 1.7%

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

22 Resources

15
Scripts
7
Styles
0
Async
2
Defer

Top Script Sources

link4u.cc(15)

Website Identity

link4u.cc

2 years old
Location detected: 🇩🇪 Germanyvia ip
NameSilo, LLC📧 Proton Mailzh

Sponsored

Last analyzed: 18 May 2026 at 05:10

Historical Analysis & Change Tracking