xfel.eu

https://xfel.eu· First analyzed 17 May 2026· Updated 17 May 2026

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xfel.eu

Mobile

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Hosting Provider

Deutsches Elektronen-Synchrotron DESY

IP Address

131.169.180.176

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Hamburg, Germany

ASN

AS1754

Organization

Deutsches Elektronen-Synchrotron DESY

Nameservers

way.desy.de.milky.desy.de.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.6 s10%

Speed Index

2.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.8 MB

65 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Deutsches Elektronen-Synchrotron DESY

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

UI Components

Libraries

CSS Frameworks

Analytics

SEO Analysis

D58/100

Meta Tags4/15

Content11/12

Headings5/8

Technical15/25

E-E-A-T3/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

xfel.euxfel.eu

European XFEL

No description available for this page.

Title Length13 chars

Recommended: 50-60 chars (~80px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

980 URLs

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

10/100

Poor

4 13 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

F34/100

Bot Access

20/25

Machine Read.

8/25

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:5%

Words:1,298

Token eff.:Optimal

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary954w

Descriptive Headingsavg 5.5w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

5/15

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

9/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 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

608 mg

CO₂e / view

4.8 MB

Page Weight

15%

Cleaner Than

New Visitor

695 mg

Returning (cached)

348 mg

Annual (10K/mo)

73.0 kg

Emission Segments

Data Center

136 mg

Network

146 mg

Device

326 mg

Resource Breakdown

JavaScript

752.5 KB

Images

3.7 MB

CSS

206.4 KB

HTML

184.3 KB

Other

37.6 KB

Green Hosting Not Verified

Deutsches Elektronen-Synchrotron DESY

9 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Interactive

HTTPS

No WAF

176d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.11.2025

Valid Until

10.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

xfel.euwww.xfel.euwof-xfel-new.desy.dexfel-new.desy.de

SHA-256 Fingerprint

E1:A9:61:B4:F8:71:0B:17:FD:8D:C4:89:70:B2:72:57:27:80:97:0A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

cache-control

⚪ Custom(proxy-revalidate)

connection

keep-alive

content-security-policy

upgrade-insecure-requests; frame-ancestors 'self';

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

b1721.mx.srv.dfn.de

c1721.mx.srv.dfn.de

a1721.mx.srv.dfn.de

Domain Information

xfel.eu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

77/100

Mobile Friendly7 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=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Neue Helvetica W01

WCAG Partial

67/100

Readability

/30

21/30

21px · LH 1.81

Hierarchy

/20

13/20

1.67x ratio

WCAG

/25

17/25

2.12:1 min contrast

Performance

/25

16/25

1 font

Heading Font

Neue Helvetica W01

Sans35px

Body Font

Neue Helvetica W01

Sans21px

Contrast Ratio

2.12:1

9 issues

Reading Comfort

~41 CPL

Narrow lines

35px

23px

22px

21px

✅ Excellent readability: 21px body text is ideal for all devices.

⚠️ Wide line spacing (1.81). 1.4–1.6 is optimal for body text.

⚠️ Hard to read: Flesch score 39/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 2.1:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 39

Color Palette

8 unique colors

8.67:1 AAA Light

#dadada

Other· 29.5%

#3b3437

Other· 7.6%

#ffffff

Primary· 0%

#e7c3a6

Accent· 7.6%

#b8aca3

Secondary· 7%

#927560

Secondary· 6.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

xfel.eu(6)local(2)matomo.desy.de(1)LgDashBoard2(1)

Website Identity

xfel.eu

Location detected: 🇩🇪 Germanyvia ip

Social Profiles

Facebook Instagram LinkedIn YouTube Bluesky

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Last analyzed: 17 May 2026 at 19:14

Historical Analysis & Change Tracking