chemdy.com

https://chemdy.com· First analyzed 31 May 2026· Updated 31 May 2026

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chemdy.com

Mobile

Sponsored

Hosting Provider

Aliyun Computing Co., LTD

IP Address

42.121.111.173

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Aliyun Computing Co., LTD

Server

Nginx

Nameservers

ns4.myhostadmin.net.ns6.myhostadmin.net.ns5.myhostadmin.net.ns3.myhostadmin.net.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

1.9 s10%

Speed Index

2.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

7.9 MB

42 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Aliyun Computing Co., LTD

Technology Stack

5 Technologies Detected

Libraries

jQuery

AOS

Other

AOS (Animate On Scroll)

CSS Frameworks

Tailwind CSS

Web Servers

Nginx

SEO Analysis

D51/100

Meta Tags5/15

Content9/12

Headings3/8

Technical13/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

chemdy.comchemdy.com

成德广营科技

深圳成德广营科技有限公司是一家专业的集成电路供应商，成立于2009年

Title Length6 chars

Recommended: 50-60 chars (~37px / 580px)

Description Length34 chars

Recommended: 120-160 chars

Issues (1)

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

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

49 URLs

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

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

Sponsored

AI & LLM Readiness

F26/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

4/25

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

def. lists

Text ratio:6%

Words:204

Token eff.:Too Short

Sections/1K:279.4

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

54/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

4/20

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

1/15

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.

14/100

1.00 g

CO₂e / view

7.9 MB

Page Weight

Cleaner Than

New Visitor

1.14 g

Returning (cached)

572 mg

Annual (10K/mo)

120.0 kg

Emission Segments

Data Center

223 mg

Network

240 mg

Device

537 mg

Resource Breakdown

JavaScript

63.8 KB

Images

7.8 MB

CSS

63.2 KB

HTML

7.1 KB

Green Hosting Not Verified

Aliyun Computing Co., LTD

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

45d

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+H3

Valid From

17.04.2026

Valid Until

16.07.2026

Subject Alternative Names (2)

chemdy.comwww.chemdy.com

SHA-256 Fingerprint

3B:EC:7B:F3:ED:1D:97:60:2A:A9:0B:EF:71:37:DE:2C:06:CB:90:18...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

quic=":443"; h3=":443"; h3-29=":443"; h3-27=":443";h3-25=":4...

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=utf-8

date

Sun, 31 May 2026 23:54:50 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

hzmx01.mxmail.netease.com

hzmx02.mxmail.netease.com

Domain Information

chemdy.com

Domain Age

16y 6m

Created

01.12.2009

Expires

01.12.2028

Last Updated

24.12.2024

Registrar

Chengdu West Dimension Digital Technology Co., Ltd.

DNSSEC

Not Enabled

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.

37/100

Not 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=1380

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

microsoft yahei

WCAG Partial

47/100

Readability

/30

14/30

14px · LH 2.14

Hierarchy

/20

5/20

WCAG

/25

14/25

1.44:1 min contrast

Performance

/25

14/25

1 font

Heading Font

microsoft yahei

Sans

Body Font

microsoft yahei

Sans14px

Contrast Ratio

1.44:1

8 issues

Reading Comfort

~57 CPL

Optimal (45–75)

12px

32px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Wide line spacing (2.14). 1.4–1.6 is optimal for body text.

✅ Optimal line length: ~57 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.4:1).

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

Buy on MyFontsFlesch 47

Color Palette

11 unique colors

Light

#ffffff

Text· 14.299999999999999%

#094884

Primary· 16.6%

#2186ca

Accent· 14.3%

#021536

Accent· 13.1%

#165d9b

Accent· 12.5%

#e8c575

Accent· 8.4%

#16a2dc

Accent· 7.2%

#6fa6c4

Secondary· 4.5%

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Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)bdimg.share.baidu.com(1)

Website Identity

chemdy.com

16 years old

Location detected: 🇨🇳 Chinavia ip

Chengdu West Dimension Digital Technology Co., Ltd.

Sponsored

Last analyzed: 31 May 2026 at 23:55

Historical Analysis & Change Tracking