ders.co.kr

https://ders.co.kr· First analyzed 22 May 2026· Updated 22 May 2026

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ders.co.kr

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.122.81

Site Location

🇰🇷 South Koreavia schema_nap

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ens1.hostcocoa.com.ens2.hostcocoa.com.ens3.hostcocoa.com.ens4.hostcocoa.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.4 s10%

Speed Index

1.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

520 KB

176 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

14 Technologies Detected

Libraries

jQuery

jQuery UI

Lodash Moment.js Axios Animate.css

UI Components

Slick Carousel Owl Carousel

CSS Frameworks

Other

Icon Libraries

Web Servers

Customer Support

SEO Analysis

D51/100

Meta Tags5/15

Content3/12

Headings3/8

Technical22/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

ders.co.krders.co.kr

Ders_디어스

디어스는 병원, 기업 영상부터 AI 광고영상, 인포그래픽, 모션그래픽, 연말 영상까지 통합적으로 제작하는 영상 서비스 입니다

Title Length8 chars

Recommended: 50-60 chars (~49px / 580px)

Description Length69 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (1 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (13/19) — critical for accessibility and SEO

11 issues found

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Crawlability

Sitemap

Type: standard

14 URLs

robots.txt

10 rules

Sitemap reference found

Local SEO

Local Search Readiness

19/100

Poor

5 15 1

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

Sponsored

AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

1/25

Citation

7/25

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

Text ratio:0%

Words:495

Token eff.:Optimal

Structured Data

19 JSON-LD

VideoObject(min)

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

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.

67/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

14/15

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

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.

57/100

53 mg

CO₂e / view

519.7 KB

Page Weight

80%

Cleaner Than

New Visitor

60 mg

Returning (cached)

30 mg

Annual (10K/mo)

6.3 kg

Emission Segments

Data Center

3 mg

Network

15 mg

Device

35 mg

Resource Breakdown

JavaScript

327.5 KB

Images

3.4 KB

CSS

42.8 KB

HTML

119.7 KB

Other

26.3 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

201d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.12.2025

Valid Until

09.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

ders.co.krwww.ders.co.kr

SHA-256 Fingerprint

DF:67:A5:7B:D6:BA:FA:12:C0:69:AC:C4:8F:B4:12:B1:3C:43:6B:79...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 22 May 2026 16:01:51 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

p3p

CP="NOI CURa ADMa DEVa TAIa OUR DELa BUS IND PHY ONL UNI COM...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

ders.co.kr

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.

65/100

Mobile Friendly131 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,viewport-fit=cover,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Apple SD Gothic Neo

WCAG Partial

60/100

Readability

/30

22/30

16px · LH 1.70

Hierarchy

/20

5/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

16/25

2 fonts

Heading Font

Apple SD Gothic Neo

Sans

Body Font

Apple SD Gothic Neo

Sans16px

Contrast Ratio

1:1

19 issues

Reading Comfort

~36 CPL

Narrow lines

51px

41px

34px

16px

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

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 1.0:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

10 unique colors

15.13:1 AAA Light

#ffffff

Background· 95.10000000000001%

#262626

Other· 0.3%

#7407ff

Primary· 0%

#0517f0

Primary· 0.6%

#878ec9

Secondary· 0.2%

#1533f4

Primary· 0.1%

#eaebf1

Secondary· 0.1%

#35374a

Secondary· 0%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

vendor-cdn.imweb.me(11)local(4)youtube.com(2)static.imweb.me(1)t1.kakaocdn.net(1)

Website Identity

Ders_디어스

OnlineStore

www.ders.co.kr

Location detected: 🇰🇷 South Koreavia schema_nap

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Last analyzed: 22 May 2026 at 16:02

Historical Analysis & Change Tracking