hack.lu

https://hack.lu· First analyzed 29 May 2026· Updated 29 May 2026

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hack.lu

$Mobile screenshot of hack.lu$

Mobile

Sponsored

Hosting Provider

Circl PUB

IP Address

185.194.93.128

Site Location

🇱🇺 Luxembourgvia tld

Server Location

🇱🇺 Schieren, Luxembourg

ASN

AS197869

Organization

Circl PUB

Server

Apache

Nameservers

kb.quuxlabs.com.ns6.gandi.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.3 MB

12 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Circl PUB

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Icon Libraries

Font Awesome

Web Servers

Apache

SEO Analysis

B74/100

Meta Tags7/15

Content9/12

Headings8/8

Technical22/25

E-E-A-T5/7

Images1/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

hack.luhack.lu

hack.lu 2026

Hack.lu is an open convention/conference where people can discuss about computer security, privacy, information technology and its cultural/technical implica...

Description truncated.

Title Length12 chars

Recommended: 50-60 chars (~70px / 580px)

Description Length244 chars

Recommended: 120-160 chars

Issues (1)

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

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

22 URLs

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

2 14 1

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

Sponsored

AI & LLM Readiness

D45/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

4/25

Citation

16/25

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:5%

Words:199

Token eff.:Too Short

Sections/1K:60.3

Depth:1/5

Structured Data

1 JSON-LD

Person×1.3

sameAs entity links

Citation Readiness

Opening Summary33w

Descriptive Headingsavg 5.3w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

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.

62/100

Passed

Critical

Warnings

Images & Alt Text

3/20

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

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

3/15

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.

24/100

415 mg

CO₂e / view

3.3 MB

Page Weight

30%

Cleaner Than

New Visitor

474 mg

Returning (cached)

237 mg

Annual (10K/mo)

49.8 kg

Emission Segments

Data Center

93 mg

Network

100 mg

Device

223 mg

Resource Breakdown

JavaScript

327.2 KB

Images

57.3 KB

CSS

2.9 MB

HTML

3.4 KB

Green Hosting Not Verified

Circl PUB

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

71%Good

Static / Informational

HTTPS

No WAF

59d

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/1.1

Valid From

28.04.2026

Valid Until

27.07.2026

Subject Alternative Names (3)

2026.hack.luhack.luwww.hack.lu

SHA-256 Fingerprint

5A:8B:EF:10:26:29:7E:6A:87:3B:7A:18:54:C2:9A:9A:43:43:F7:58...

Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

3213

content-type

text/html

date

Fri, 29 May 2026 15:33:12 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

tickets.circl.lu

Domain Information

hack.lu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

56/100

Mobile Friendly

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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial

78/100

Readability

/30

25/30

28px · LH 1.50

Hierarchy

/20

17/20

1.95x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Sans54px

Body Font

-apple-system

Sans28px

Contrast Ratio

1:1

10 issues

Reading Comfort

Single Font Family

left aligned

54px

28px

22px

28px

✅ Excellent readability: 28px body text is ideal for all devices.

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

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.0:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 68

Color Palette

10 unique colors

20.14:1 AAA Light

#ffffff

Background· 37.00000000000001%

#070707

Background· 17.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)pretalx.com(1)

Website Identity

hack.lu

Person

2026.hack.lu

Location detected: 🇱🇺 Luxembourgvia tld

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 29 May 2026 at 15:33

Historical Analysis & Change Tracking