shanghai21togo.com

https://shanghai21togo.com· First analyzed 21 May 2026· Updated 21 May 2026

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shanghai21togo.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.43.43

Site Location

🇺🇸 New York, United Statesvia schema

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

magdalena.ns.cloudflare.com.yoxall.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

777 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

489 KB

29 requests

Image Optimization

Lazy LoadCloudinary

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

4 Technologies Detected

CSS Frameworks

Icon Libraries

Fonts

CDN

SEO Analysis

C68/100

Meta Tags13/15

Content8/12

Headings8/8

Technical19/25

E-E-A-T0/7

Images2/7

Links4/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

shanghai21togo.comshanghai21togo.com

Shanghai 21 : New York, NY 10013 | Shanghainese Cuisine

Shanghai 21 Serves Authentic and Delicious Shanghainese Food. Order Online For Pick or Delivery

Title Length55 chars

Recommended: 50-60 chars (~321px / 580px)

Description Length96 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (8/8) — critical for accessibility and SEO

7 issues found

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Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

48/100

Fair

12 12

Sponsored

AI & LLM Readiness

D40/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

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:11%

Words:226

Token eff.:Too Short

Sections/1K:26.5

Depth:1/5

Structured Data

1 JSON-LD

Citation Readiness

Opening Summary56w

Descriptive Headingsavg 2.7w

Canonical URL

Open Graph2/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

59/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

14/20

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

1/15

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.

61/100

49 mg

CO₂e / view

489.3 KB

Page Weight

90%

Cleaner Than

New Visitor

57 mg

Returning (cached)

28 mg

Annual (10K/mo)

5.9 kg

Emission Segments

Data Center

2 mg

Network

15 mg

Device

33 mg

Resource Breakdown

JavaScript

66.4 KB

Images

45.1 KB

CSS

372.8 KB

Fonts

768 B

HTML

4.2 KB

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

WAF

64d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

25.04.2026

Valid Until

24.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

shanghai21togo.com*.shanghai21togo.com

SHA-256 Fingerprint

4E:2D:46:93:F8:D0:24:D6:C0:62:26:50:49:66:41:17:57:E8:A3:2C...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9ff44546ad43792a-CDG

content-encoding

zstd

content-type

text/html; charset=utf-8

date

Thu, 21 May 2026 14:28:58 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

shanghai21togo.com

Domain Age

7y 5m

Created

10.12.2018

Expires

10.12.2026

Last Updated

11.12.2025

Registrar

GoDaddy.com, LLC

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.

69/100

Mobile Friendly3 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, shrink-to-fit=no

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Dosis + Nixie One

WCAG AA

78/100

Readability

/30

21/30

18px · LH 1.90

Hierarchy

/20

17/20

2.75x ratio · ✓ H1→H6

WCAG

/25

22/25

4.56:1 min contrast

Performance

/25

18/25

2 fonts · 1 req

Heading Font

Dosis

Sans50px

Body Font

Nixie One

Sans18px

Contrast Ratio

4.56:1

WCAG AA (≥4.5:1)

Reading Comfort

Dual Sans-Serif

center aligned

50px

28px

13px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Wide line spacing (1.90). 1.4–1.6 is optimal for body text.

❌ Very complex text: Flesch score 25/100. 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.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

GGoogle FontsFlesch 25

Color Palette

13 unique colors

Light

#ffffff

Background· 23.1%

#3b1c0c

Primary· 11.5%

#5f260c

Accent· 9.2%

#df7214

Accent· 7.7%

#bd4d08

Accent· 7.6%

#160905

Accent· 6.6%

#852e05

Accent· 5.8%

#e5b873

Accent· 5.4%

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(1)

Website Identity

Shanghai 21

Restaurant

7 years old

21 Mott St, New York

10013, New York, NY

Location detected: 🇺🇸 United States, New Yorkvia schema

GoDaddy.com, LLCen

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Last analyzed: 21 May 2026 at 14:29

Historical Analysis & Change Tracking