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g-u.com

https://g-u.com· First analyzed 13 May 2026· Updated 13 May 2026
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g-u.com
Desktop screenshot of g-u.com
Mobile screenshot of g-u.com
Mobile

Sponsored

Hosting Provider

F5 Distributed cloud services

IP Address

159.60.157.20

Site Location

🇩🇪 Germanyvia phone

Server Location

🇫🇷 Suresnes, France

ASN

AS35280

Organization

F5 Distributed cloud services

Server

volt-adc

Nameservers

ns1.f5clouddns.com.ns2.f5clouddns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
489 ms10%
Speed Index
636 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
26.4 MB
114 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
F5 Distributed cloud services

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

SEO Analysis

B74/100
23
4
1
Meta Tags9/15
Content11/12
Headings8/8
Technical22/25
E-E-A-T0/7
Images7/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
G
g-u.comg-u.com

Fenster- / Türtechnik und Gebäudemanagementsystemen | Gretsch-Unit...

Öffnen, bewegen, schließen, sichern: Die GU-Gruppe ist Hersteller von Fenster- und Türtechnik, Automatischen Eingangs- sowie Gebäudemanagementsystemen

Title truncated.
Title Length74 chars

Recommended: 50-60 chars (~471px / 580px)

Description Length150 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (74 chars, ~471px). Will be truncated in search results.

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

5,050 URLs

robots.txt

41 rules

Sitemap reference found

Local SEO

Local Search Readiness

16/100
Poor
5 11 1

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

Sponsored

AI & LLM Readiness

D41/100
Bot Access
20/25
Machine Read.
9/25
Schema Data
1/25
Citation
11/25

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:3,389
Token eff.:Good
Sections/1K:3.8
Depth:1/5

Structured Data

2 JSON-LD
VideoObject

Citation Readiness

Opening Summary55w
Descriptive Headingsavg 3.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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.
A
80/100
12
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
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
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.
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.
27/100
F
3.34 g
CO₂e / view
26.4 MB
Page Weight
5%
Cleaner Than
New Visitor
3.82 g
vs
Returning (cached)
1.91 g
Annual (10K/mo)
401.2 kg
Emission Segments
Data Center
747 mg
Network
803 mg
Device
1.79 g
Resource Breakdown
JavaScript
194.3 KB
Images
537.7 KB
CSS
2.4 MB
HTML
34.1 KB
Other
23.2 MB
Green Hosting Not Verified
F5 Distributed cloud services
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

84d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.05.2026

Valid Until

05.08.2026

Subject Alternative Names (10)

assets.g-u.comdsb-edit.g-u.comdsb.g-u.cominfoportal.g-u.compdp.g-u.comqr.g-u.comsst-staging.g-u.comsst.g-u.com+2 more

SHA-256 Fingerprint

DA:10:1B:40:AB:58:B5:AD:65:AF:1D:9B:36:F1:3B:75:16:C6:1F:73...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

age
452
cache-control
🟡 600s(max-age=600, public)
content-encoding
📦 Gzip(gzip)
content-language
de
content-security-policy
default-src 'self'; script-src 'report-sample' 'self' 'unsaf...
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

gu-com0c.mail.protection.outlook.com

Domain Information

g-u.com

Domain Age
29y 11m

Created

12.06.1996

Expires

11.06.2026

Last Updated

24.03.2026

Registrar

united-domains GmbH

DNSSEC
Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner
Usercentrics
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Usercentrics
Privacy policy page linked
Data Protection Officer mentioned

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
65/100
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, minimum-scale=1
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Mukta

WCAG Partial
71/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
20/20

2.5x ratio · ✓ H1→H6

WCAG
/25
15/25

1:1 min contrast

Performance
/25
11/25

1 font · 7 req

Heading Font

Mukta

Sans40px

Body Font

Mukta

Sans16px

Contrast Ratio

1:1

2 issues

Reading Comfort

~37 CPL

Narrow lines
40px
h1
40px
h2
24px
h3
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 23/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Buy on MyFontsFlesch 23

Color Palette

7 unique colors
4.95:1 AA Dark
#707070
Other· 47.599999999999994%
#ffffff
Background· 19.099999999999998%
#283746
Primary· 9.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

21 Resources

20
Scripts
1
Styles
10
Async
0
Defer

Top Script Sources

local(10)web.cmp.usercentrics.eu(8)gstatic.com(1)google.com(1)

Website Identity

gu-referenzen-video-hero.mp4

VideoObject

gu-referenzen-video-hero.mp4

info@g-u.de
+49 7156 301-0
29 years old
Location detected: 🇩🇪 Germanyvia phone
united-domains GmbH📧 Microsoft 365de-DE

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Last analyzed: 13 May 2026 at 07:48

Historical Analysis & Change Tracking