concerthouse.co.kr

https://concerthouse.co.kr· First analyzed 13 May 2026· Updated 13 May 2026

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concerthouse.co.kr

Mobile

Sponsored

Hosting Provider

Kornet

IP Address

183.111.182.249

Site Location

🇰🇷 South Koreavia tld

Server Location

🇰🇷 Seongnam-si, South Korea

ASN

AS4766

Organization

Kornet

Server

Nginx

Nameservers

ns1.concerthouse.co.kr.ns.concerthouse.co.kr.ns3.concerthouse.co.kr.ns2.concerthouse.co.kr.

Performance

Core Web Vitals

Weight

First Contentful Paint

4.4 s10%

Speed Index

5.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.6 MB

55 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Kornet

Technology Stack

9 Technologies Detected

CSS Frameworks

Bootstrap

Tailwind CSS

Icon Libraries

Font Awesome Ionicons

Libraries

Fonts

Analytics

Tag Managers

Web Servers

SEO Analysis

D49/100

Meta Tags5/15

Content7/12

Headings3/8

Technical11/21

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile1/4

Indexability3/3

concerthouse.co.krconcerthouse.co.kr

콘서트하우스

콘서트하우스는 관객중심의 공연문화와 다양한 문화예술공간을 만듭니다. 충북 청주 공연 전시 안내.

Title Length6 chars

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

Description Length53 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

14 issues found

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Local SEO

Local Search Readiness

5/100

Poor

2 13 2

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.

2/25

Schema Data

0/25

Citation

16/25

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:2%

Words:165

Token eff.:Too Short

Sections/1K:6.1

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary31w

Descriptive Headingsavg 2w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

48/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

0/15

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

6/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

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.

16/100

335 mg

CO₂e / view

2.6 MB

Page Weight

30%

Cleaner Than

New Visitor

382 mg

Returning (cached)

191 mg

Annual (10K/mo)

40.1 kg

Emission Segments

Data Center

75 mg

Network

80 mg

Device

180 mg

Resource Breakdown

JavaScript

259.5 KB

Images

22.4 KB

CSS

2.3 MB

HTML

35.4 KB

Green Hosting Not Verified

Kornet

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

No SSL

No WAF

nulld

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

content-type

text/html; charset=utf-8

date

Wed, 13 May 2026 17:42:08 GMT

expires

last-modified

Wed, 13 May 2026 17:42:08 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

rmw-002.fmcity.com

rabn-010.cafe24.com

Domain Information

concerthouse.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.

40/100

Not Mobile Friendly6 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.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Malgun Gothic

WCAG Partial

48/100

Readability

/30

16/30

13px · LH 1.70

Hierarchy

/20

9/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

9/25

2 fonts · 8 req

Heading Font

Malgun Gothic

Sans

Body Font

Malgun Gothic

Sans13px

Contrast Ratio

1:1

7 issues

Reading Comfort

~48 CPL

Optimal (45–75)

16px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~48 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

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

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

⚠️ High font requests: 8 font files loaded. Consider variable fonts or subsetting.

Buy on MyFonts

Color Palette

8 unique colors

12.63:1 AAA Light

#ffffff

Background· 70.7%

#333333

Text· 5.3999999999999995%

#baadaa

Primary· 2.6%

#f0efeb

Secondary· 1.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

concerthouse.co.kr(15)googletagmanager.com(1)

Website Identity

concerthouse.co.kr

concerthouse7200@gmail.com

Location detected: 🇰🇷 South Koreavia tld

Social Profiles

Facebook Instagram YouTube

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Last analyzed: 13 May 2026 at 17:42

Historical Analysis & Change Tracking