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gassan.com

https://gassan.com· First analyzed 14 May 2026· Updated 14 May 2026
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gassan.com
Desktop screenshot of gassan.com
Mobile screenshot of gassan.com
Mobile

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Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.21

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

ns2.serviceprovider.nl.ns1.serviceprovider.nl.ns4.serviceprovider.nl.ns3.serviceprovider.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
640 ms10%
Speed Index
832 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.7 MB
205 requests

Image Optimization

Lazy LoadResponsiveimgixVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Next.js
Styling
Tailwind CSS
CMS
Kentico
Infrastructure
Platform
Vercel
CDN
Vercel Image

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

14 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft Clarity

CSS Frameworks

2
Bootstrap
Tailwind CSS

Advertising

2
Pinterest TagTikTok Pixel

Meta Frameworks

1
Next.js

Other

1
D3.js

Tag Managers

1
Google Tag Manager

Reviews

1
Trustpilot

Payments

1
Square

Platforms

1
Vercel

SEO Analysis

B73/100
22
7
1
Meta Tags14/15
Content8/12
Headings3/8
Technical24/25
E-E-A-T2/7
Images4/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile2/4
Indexability3/3
G
gassan.comgassan.com

HOUSE of GASSAN: diamanten, juwelen en horloges

Juwelier HOUSE of GASSAN in Amsterdam staat voor hoge kwaliteit & service. We hebben meer dan 75 jaar ervaring en zijn 100% een familiebedrijf.

Title Length47 chars

Recommended: 50-60 chars (~291px / 580px)

Description Length145 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,733 URLs

robots.txt

99 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

19/100
Poor
5 13

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

D45/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
3/25
Citation
12/25

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:429
Token eff.:Optimal
Sections/1K:4.7
Depth:1/5

Structured Data

1 JSON-LD
Organization×1.1
sameAs entity links

Citation Readiness

Opening Summary48w
Descriptive Headingsavg 3.2w
Canonical URL
Open Graph1/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
C
66/100
9
Passed
5
Critical
2
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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.
5 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.
50/100
E
281 mg
CO₂e / view
2.7 MB
Page Weight
30%
Cleaner Than
New Visitor
321 mg
vs
Returning (cached)
160 mg
Annual (10K/mo)
33.7 kg
Emission Segments
Data Center
14 mg
Network
83 mg
Device
184 mg
Resource Breakdown
JavaScript
1.8 MB
Images
4.7 KB
CSS
53.2 KB
Fonts
85.4 KB
HTML
98.2 KB
Other
727.7 KB
Green Hosting Verified
Vercel
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

46d

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

31.03.2026

Valid Until

29.06.2026

Subject Alternative Names (1)

www.gassan.com

SHA-256 Fingerprint

87:65:A0:21:A6:80:37:32:8F:AB:F8:19:A2:49:77:D8:DC:8D:8E:70...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin
*
age
62218
cache-control
🟡 0s(public, max-age=0, must-revalidate)
content-disposition
inline
content-encoding
⚡ Brotli(br)
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

gw000034-eu.fortimail.com
gw000034-eu.fortimail.com

Domain Information

gassan.com

Domain Age
27y 6m

Created

07.11.1998

Expires

06.11.2026

Last Updated

07.11.2025

Registrar

Metaregistrar BV

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.
A
83/100
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, initial-scale=1.0, viewport-fit=cover

Typography & Readability

Louize Display + Graphik

WCAG Partial
68/100
Readability
/30
23/30

16px · LH 1.60

Hierarchy
/20
8/20
WCAG
/25
17/25

1:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

Louize Display

Sans

Body Font

Graphik

Sans16px

Contrast Ratio

1:1

10 issues

Reading Comfort

~46 CPL

Optimal (45–75)
72px
h2
32px
h3
48px
h4
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~46 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 25/100. Consider shorter sentences and simpler words.

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

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Buy on MyFontsFlesch 25

Color Palette

10 unique colors
13.18:1 AAA Light
#ffffff
Primary· 37.900000000000006%
#303031
Other· 5.6%
#e6ddd7
Secondary· 13.799999999999999%
#734a3c
Secondary· 7%
#f2eeea
Secondary· 6.7%
#9e8880
Secondary· 6.2%

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

Advertising

3
Facebook PixelMid-Market
Pinterest AdsMid-Market
TikTok PixelMid-Market

Ad platforms and retargeting pixels

Reviews & Social Proof

1
TrustpilotMid-Market

Customer reviews and testimonials

3

Categories

7

Total Tools

0

Enterprise

4

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

22 Resources

20
Scripts
2
Styles
15
Async
3
Defer

Top Script Sources

s.pinimg.com(3)analytics.tiktok.com(3)googletagmanager.com(3)local(3)static.scarabresearch.com(2)

Website Identity

Gassan Diamonds

Gassan Diamonds

Organization
www.gassan.com
27 years old
Location detected: 🇺🇸 United Statesvia ip
Metaregistrar BVnl

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Last analyzed: 14 May 2026 at 06:40

Historical Analysis & Change Tracking