duct.co.kr

https://duct.co.kr· First analyzed 11 May 2026· Updated 11 May 2026

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duct.co.kr

Mobile

Sponsored

Hosting Provider

hostment

IP Address

114.108.128.130

Site Location

🇰🇷 South Koreavia tld

Server Location

🇰🇷 Gwangju, South Korea

ASN

AS3786

Organization

hostment

Server

Apache

Nameservers

ns.cafe24.com.ns1.cafe24.com.ns0.cafe24.com.ns2.cafe24.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.0 s10%

Speed Index

2.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.5 MB

57 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

hostment

Technology Stack

9 Technologies Detected

Libraries

Analytics

UI Components

Other

AOS (Animate On Scroll)

CSS Frameworks

Tailwind CSS

Web Servers

Apache

SEO Analysis

D55/100

Meta Tags7/15

Content12/12

Headings3/8

Technical15/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

duct.co.krduct.co.kr

duct machine, duct flex, aluminum duct machine, aluminum flexible d...

duct machine, duct flex, aluminum duct machine, aluminum flexible duct, air ventilation, non-insulated duct, insulated duct, fiberglass insulation, glas...

Title truncated. Description truncated.

Title Length212 chars

Recommended: 50-60 chars (~1244px / 580px)

Description Length202 chars

Recommended: 120-160 chars

Issues (3)

• Title is too long (212 chars, ~1244px). Will be truncated in search results.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (31/44) — critical for accessibility and SEO

11 issues found

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Crawlability

Sitemap

Type: standard

500 URLs

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

4/100

Poor

2 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

D41/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

0/25

Citation

8/25

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

navheader/footer

Text ratio:6%

Words:504

Token eff.:Optimal

Sections/1K:9.9

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 5.4w

Canonical URL

Open Graph0/3

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.

81/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

18/20

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

9/15

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.

15/100

567 mg

CO₂e / view

4.5 MB

Page Weight

15%

Cleaner Than

New Visitor

648 mg

Returning (cached)

324 mg

Annual (10K/mo)

68.0 kg

Emission Segments

Data Center

127 mg

Network

136 mg

Device

304 mg

Resource Breakdown

JavaScript

105.0 KB

Images

4.2 MB

CSS

134.9 KB

HTML

43.4 KB

Green Hosting Not Verified

hostment

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

270d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

05.01.2026

Valid Until

05.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

duct.co.krwww.duct.co.kr

SHA-256 Fingerprint

82:F4:EB:32:11:1C:63:5C:09:7A:15:DD:29:34:A2:B9:8A:80:50:CC...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(pre-check=0, post-check=0, max-age=0)

connection

Keep-Alive

content-type

text/html; charset=utf-8

date

Mon, 11 May 2026 23:34:29 GMT

expires

keep-alive

timeout=3, max=100

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mx02.mailplug.com

mx01.mailplug.com

Domain Information

duct.co.kr

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

58/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

SUIT Variable

WCAG Partial

71/100

Readability

/30

20/30

16px · LH --

Hierarchy

/20

18/20

2x ratio · ✓ H1→H6

WCAG

/25

17/25

1:1 min contrast

Performance

/25

16/25

1 font

Heading Font

SUIT Variable

Sans32px

Body Font

SUIT Variable

Sans16px

Contrast Ratio

1:1

12 issues

Reading Comfort

~38 CPL

Narrow lines

32px

60px

16px

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

✅ Easy to read: Flesch score 80/100 — accessible to general audiences.

⚠️ Partial contrast: 12 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 2.0x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 80

Color Palette

9 unique colors

10.8:1 AAA Dark

#25272a

Other· 36.5%

#d9dbdf

Secondary· 5.5%

#0f121d

Primary· 18.1%

#4d453e

Secondary· 14.3%

#45282b

Secondary· 1.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

unpkg.com(2)js(2)googletagmanager.com(1)code.jquery.com(1)

Website Identity

duct.co.kr

Location detected: 🇰🇷 South Koreavia tld

Sponsored

Last analyzed: 11 May 2026 at 23:35

Historical Analysis & Change Tracking