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davidzwirner.com

https://davidzwirner.com· First analyzed 29 Apr 2026· Updated 29 Apr 2026
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davidzwirner.com
Desktop screenshot of davidzwirner.com
Mobile screenshot of davidzwirner.com
Mobile

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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

18.165.140.30

Site Location

🇺🇸 New York, United Statesvia schema

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Vercel

CDN

CloudFront

Nameservers

ns-1514.awsdns-61.org.ns-1771.awsdns-29.co.uk.ns-352.awsdns-44.com.ns-1000.awsdns-61.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
573 ms10%
Speed Index
745 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.8 MB
138 requests

Image Optimization

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

Architecture Stack

JAMstack
⚡ SSG
Decoupled
Frontend
Framework
Next.js
Styling
Tailwind CSS
API
Data Source
Headless CMS
Sanity
Infrastructure
Platform
Vercel
CDN
CloudFront

Detected API Sources

https://cdn.sanity.io/images/j...https://cdn.sanity.io/images/j...

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Platforms

1
Vercel

SEO Analysis

B74/100
22
5
2
Meta Tags8/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
D
davidzwirner.comdavidzwirner.com

David Zwirner: New York, Los Angeles, London, Paris and Hong Kong G...

David Zwirner is an art gallery with locations in New York, Los Angeles, London, Paris and Hong Kong. We present physical and online exhibitions, podcasts, b...

Title truncated. Description truncated.
Title Length75 chars

Recommended: 50-60 chars (~449px / 580px)

Description Length172 chars

Recommended: 120-160 chars

Issues (2)

  • • Title is too long (75 chars, ~449px). Will be truncated in search results.
  • • Most images missing alt text (31/38) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

16 rules

Sitemap reference found

Local SEO

Local Search Readiness

51/100
Fair
13 10

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AI & LLM Readiness

D54/100
Bot Access
20/25
Machine Read.
16/25
Schema Data
6/25
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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:1%
Words:879
Token eff.:Optimal
Sections/1K:3.4
Depth:1/5

Structured Data

1 JSON-LD
Organization×1.1LocalBusiness×1.1
sameAs entity links

Citation Readiness

Opening Summary11w
Descriptive Headingsavg 2.6w
Canonical URL
Open Graph3/3
Twitter Card1/3
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
13
Passed
4
Critical
3
Warnings
Images & Alt Text
3/20
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
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
7/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
45/100
E
294 mg
CO₂e / view
2.8 MB
Page Weight
30%
Cleaner Than
New Visitor
336 mg
vs
Returning (cached)
168 mg
Annual (10K/mo)
35.2 kg
Emission Segments
Data Center
14 mg
Network
86 mg
Device
193 mg
Resource Breakdown
JavaScript
2.2 MB
Images
745 B
CSS
82.2 KB
Fonts
150.0 KB
HTML
72.4 KB
Other
373.8 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

188d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

20.04.2026

Valid Until

03.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (13)

www.davidzwirner.comdavidzwirner.comutopia-editions.comwww.utopia-editions.comimages.davidzwirnerbooks.comwww.davidzwirnerbooks.comassets.davidzwirnerbooks.comdavidzwirnerbooks.com+5 more

SHA-256 Fingerprint

23:97:38:38:E8:B0:B3:5B:0D:E1:4B:77:CF:C3:54:E4:0B:48:FA:58...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age
512
alt-svc
h3=":443"; ma=86400
cache-control
🟡 0s(public, max-age=0, must-revalidate)
content-encoding
⚡ Brotli(br)
content-type
text/html; charset=utf-8
date
Wed, 29 Apr 2026 18:17:19 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt4.aspmx.l.google.com
aspmx.l.google.com
alt2.aspmx.l.google.com
alt3.aspmx.l.google.com

+1 more

Domain Information

davidzwirner.com

Domain Age
27y 11m

Created

15.05.1998

Expires

14.05.2027

Last Updated

14.04.2026

Registrar

NameCheap, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

TrustArc

Cookie Consent Banner
TrustArc
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: TrustArc
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.
B
71/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

AvenirNext

WCAG AA
71/100
Readability
/30
20/30

16px · LH 1.50

Hierarchy
/20
12/20

1x ratio · ✓ H1→H6

WCAG
/25
23/25

4.61:1 min contrast

Performance
/25
16/25

1 font · 7 req

Heading Font

AvenirNext

Sans16px

Body Font

AvenirNext

Sans16px

Contrast Ratio

4.61:1

WCAG AA (≥4.5:1)

Reading Comfort

~36 CPL

Narrow lines
16px
h1
30px
h2
44px
h3
44px
h4
16px
p
Augmented Fourth
Scale

✅ 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 4/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.6:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFluid Type (rem)Flesch 4

Color Palette

5 unique colors
3.36:1 AA Large Light
#8c8c8c
Other· 53.3%
#ffffff
Background· 29%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google AnalyticsFree
Google Tag ManagerFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

24 Resources

20
Scripts
4
Styles
4
Async
16
Defer

Top Script Sources

local(16)google-analytics.com(2)gstatic.com(1)googletagmanager.com(1)

Website Identity

David Zwirner

David Zwirner

LocalBusiness

David Zwirner is a global leader in contemporary art, with galleries in New York, Los Angeles, London, Paris, and Hong Kong. Each location offers a unique selection of exhibitions and events, making it an essential destination for art enthusiasts.

212-517-8677
www.davidzwirner.com
27 years old

537 W 20th St, New York

10011, New York, NY

USA

Location detected: 🇺🇸 United States, New Yorkvia schema
NameCheap, Inc.📧 Google Workspaceen

Social Profiles

FacebookInstagram

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Last analyzed: 29 Apr 2026 at 18:26

Historical Analysis & Change Tracking