gnah.co.kr SEO report

강릉아산병원

Visit website
38/ 100

OVERALL SEO SCORE

Review your next improvements

Checks are based on public HTML and responses. Review the evidence and recommended actions below.

Passed13
Needs review17
Not checked1
Analyzed Checks 31

The score excludes checks that could not be completed.

Screenshot

PagePeeker
gnah.co.kr
gnah.co.kr Screenshot

NEXT STEPS

Recommended next steps

Up to four findings, ordered by check weight.

01

Title

Write a distinctive title, lead with the subject and avoid repeating keywords or the brand.

 02

Description

Describe what this specific page offers and avoid reusing the same description across every page.

 03

Headings

Use H1 for the main subject and H2/H3 for logical subsections, rather than selecting levels for visual size alone.

 04

Image alt

Describe informative images in context. Empty alt="" can be appropriate for decorative images, so inspect their purpose before changing them.

Detailed findings

Review the observed values, context and actions for each check.

02

Content and images

5 checks

Headings

Needs review
H1 2 / H2 0 / H3 15

Headings organize a page into a main topic and supporting sections. This tool checks for one H1 and shows the saved H2-H6 structure.

Recommended action

Use H1 for the main subject and H2/H3 for logical subsections, rather than selecting levels for visual size alone.

Targets and suggested changes

Targethttps://gnah.co.kr/kor/Main.do

HTML response line 242 · /html/body/div[2]/h1

If multiple H1s are shown, choose the main topic and use suitable subsection levels for the others. If absent, add the main heading near the start of content.

View evidence and example changes
Observed content
<h1 class="blind">스킵네비게이션</h1>
<h1 class="logo">
	<a href="/kor/Main.do">
		<span class="slogo">
			<img src="/attach/IMAGE/TopDesignMgr/LogoImgUpload/2020/8/kUi2WpIG8c7jcOn9.PNG" alt="강릉아산병원">
			<em class="logo-txt blind">강릉아산병원</em>
		</span>
	</a>
</h1>
Example - adapt to the actual content and environment
<h1>Main topic of this page</h1>

Image alt

Needs review
31 images; 20 with non-empty alt; 11 empty or missing

Alternative text conveys an image’s meaning. The count includes images with non-empty alt text.

Recommended action

Describe informative images in context. Empty alt="" can be appropriate for decorative images, so inspect their purpose before changing them.

Targets and suggested changes

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG

HTML response line 184 · /html/body/div[1]/div[1]/div[1]/a/img

Find the img tag using this URL. Describe informative content, or explicitly use empty alt for a decorative image. The text below is a placeholder; preserve existing classes, dimensions and other attributes.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="Describe the actual image content">

For a decorative image:
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="">

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG

HTML response line 212 · /html/body/div[1]/div[2]/div[1]/a/img

Find the img tag using this URL. Describe informative content, or explicitly use empty alt for a decorative image. The text below is a placeholder; preserve existing classes, dimensions and other attributes.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="Describe the actual image content">

For a decorative image:
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG

HTML response line 275 · /html/body/div[3]/div/div[1]/div[1]/div/a/img

Find the img tag using this URL. Describe informative content, or explicitly use empty alt for a decorative image. The text below is a placeholder; preserve existing classes, dimensions and other attributes.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="Describe the actual image content">

For a decorative image:
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG

HTML response line 286 · /html/body/div[3]/div/div[1]/div[2]/div/img

Find the img tag using this URL. Describe informative content, or explicitly use empty alt for a decorative image. The text below is a placeholder; preserve existing classes, dimensions and other attributes.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="Describe the actual image content">

For a decorative image:
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/h9gDAxnMyqtY5vTV.PNG

HTML response line 1668 · /html/body/div[4]/article/main/div/div[1]/div[2]/div[2]/div[1]/div[2]/div/img

Find the img tag using this URL. Describe informative content, or explicitly use empty alt for a decorative image. The text below is a placeholder; preserve existing classes, dimensions and other attributes.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/h9gDAxnMyqtY5vTV.PNG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/h9gDAxnMyqtY5vTV.PNG" alt="Describe the actual image content">

For a decorative image:
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/h9gDAxnMyqtY5vTV.PNG" alt="">

11 targets; the first five are shown. Review the full saved list in the details below.

Language

Passed
ko

The html lang attribute identifies the document’s primary language and helps assistive software select pronunciation.

Keep in mind

Match lang to the main content and mark passages written in another language as appropriate.

Charset

Passed
UTF-8

The encoding declaration tells clients how to decode text. It must match the actual response bytes.

Keep in mind

Keep the HTTP or HTML charset declaration consistent with the file encoding; use UTF-8 for UTF-8 content.

Text/HTML ratio

Needs review
2.68%

Tool reference range 15-70%; not an official ranking threshold.

This compares visible text length with HTML length. It cannot determine content quality or rankings on its own.

Recommended action

Do not add filler text to target a ratio. Check for useful HTML content and unnecessary markup.

Targets and suggested changes

Targethttps://gnah.co.kr/kor/Main.do

main / body

Check whether main content exists in the initial HTML. Consider server rendering for missing core text; do not add filler to target a ratio.

View evidence and example changes
Observed content
2.68%

Heading structure

Saved headings, up to 50 per level. Expand the H2-H6 lists when needed.

H12
H20
H315
H43
H53
H60
H1

스킵네비게이션

강릉아산병원

H2 0View headings

No headings at this level.

H3 15View headings
  1. 소아청소년과 전문의 초빙 공고
  2. 모바일 앱 게시
  3. 의료기관 인증 획득
  4. 암 걱정없는 건강한 삶을 위해
  5. 진료과/센터/의료진
  6. 온라인 진료 예약
  7. 강릉아산 의료진 GangNeung Asan Hospital medical staff
  8. 4개 배너
  9. 바로가기
  10. 바로가는 서비스
  11. 오시는 길
  12. 주차장 안내
  13. 동의서 위임장
  14. 증명서 발급
  15. 강릉아산병원 서비스메뉴
H4 3View headings
  1. 보건복지부 4주기
  2. 암 치료 잘하는 병원
  3. 강릉아산병원 암센터가 함께하겠습니다.
H5 3View headings
  1. 진료과
  2. 전문센터
  3. 기타부서안내
Images and alternative text31 saved

Up to 100 images are saved. Review an image’s purpose when its alt text is empty.

URLImage alt
https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPGEmpty or missing
https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPGEmpty or missing
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNGEmpty or missing
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNGEmpty or missing
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG무표식 실시간 표면유도 방사선 치료
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2024/1/Noy0Cr1ReZ4QBS1i.PNG진료비 하이패스 시행
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2023/5/jJHS0POcscJy3NP6.PNG간호·간병 통합 서비스
https://gnah.co.kr/attach/IMAGE/TopDesignMgr/LogoImgUpload/2020/8/kUi2WpIG8c7jcOn9.PNG강릉아산병원
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2024/3/kTrfnsRkZkRK4AvF.JPG봄전경_아름다운 의료문화를 열어가는 모델병원
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2025/9/v9TqRNWxlBdIyhXu.JPG보건복지부 4주기 의료기관 인증 획득
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2024/12/D3VueElKlQ110PKu.JPG암치료잘하는병원_암걱정없는삶
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2023/12/KrxrAK7lMJxVzRvH.JPG재관류치료 뇌졸중센터 인증
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2023/12/vXVHgDlGEbRtYhiP.JPG강릉아산병원 유튜브 안내
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2025/9/9y593SFdTTgv0voq.PNG보건복지부 인증마크 획득1
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/h9gDAxnMyqtY5vTV.PNGEmpty or missing
https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2021/6/UeIK8q1QrVjmWLW5.PNG검진기관평가 우수기관선정
https://gnah.co.kr/kor/ajx_json/UploadMgr/thumImg.do?fileName=L2F0dGFjaC9JTUFHRS9Eb2N0b3JNZ3IvMjAyNi8zL09pN1Z3bXExYUxNMndid0RMWjJT&w=290&h=300&fileRename=thumMainImg&fileExt=jpg이정규
https://gnah.co.kr/kor/ajx_json/UploadMgr/thumImg.do?fileName=L2F0dGFjaC9JTUFHRS9Eb2N0b3JNZ3IvMjAxOS8xMS9iSG5tZTRMbTFhYUtTbFhnTXFXVg==&w=290&h=300&fileRename=thumMainImg&fileExt=jpg여남경
https://gnah.co.kr/kor/ajx_json/UploadMgr/thumImg.do?fileName=L2F0dGFjaC9JTUFHRS9Eb2N0b3JNZ3IvMjAyMS8zL2xyeXR0WUM3UFpNRklaN09EblpN&w=290&h=300&fileRename=thumMainImg&fileExt=jpg홍종삼 센터장
https://gnah.co.kr/kor/ajx_json/UploadMgr/thumImg.do?fileName=L2F0dGFjaC9JTUFHRS9Eb2N0b3JNZ3IvMjAxOS8xMS9xUGpGdWJoY0l0TUhYUDg5Zjlzag==&w=290&h=300&fileRename=thumMainImg&fileExt=jpg정상식
https://gnah.co.kr/resources/homepage/kor/_Img/Main/icon_youtube.png유튜브
https://gnah.co.kr/resources/homepage/kor/_Img/Main/icon_facebook.png페이스북
https://gnah.co.kr/resources/homepage/kor/_Img/Main/icon_instagram.png인스타그램
https://gnah.co.kr/resources/homepage/kor/_Img/Main/icon_naver_blog.png블러그
https://gnah.co.kr/resources/_Img/Common/ajax_loding.gif로딩이미지
https://gnah.co.kr/attach/IMAGE/mimban/TMPL00/2019/11/rClpjYF4gUGwa4jt93P6.pngEmpty or missing
https://gnah.co.kr/resources/homepage/kor/_Img/Main/main_icon_p.pngEmpty or missing
https://gnah.co.kr/attach/IMAGE/mimban/TMPL00/2019/11/CfUTtrslFEwHp5clYSR4.pngEmpty or missing
https://gnah.co.kr/attach/IMAGE/mimban/TMPL00/2019/11/ktv9OpmdcGB239Idncln.pngEmpty or missing
https://gnah.co.kr/resources/_Img/Templet/Layout/footer_mark01.pngEmpty or missing
https://gnah.co.kr/resources/_Img/Templet/Layout/footer_mark03.pngEmpty or missing
KeywordsFrequency and metadata

Word occurrence counts from extracted content, not search demand or keyword rankings.

안내13 오시는8 병원8 강릉아산병원7 대표번호6 둘러보기6 서비스5 예약5 발급5 진료과4 의료진4 증명서4 인증4 gangneung4 더보기4 않기3 닫기3 로그인3 보건복지부3 의료기관3

Meta keywords · 강릉아산,강릉아산병원

Meta keywords do not contribute to this tool’s score.

04

Mobile experience

5 checks

Viewport

Passed
width=device-width, initial-scale=1.0 ,maximum-scale=1.0, minimum-scale=1.0,user-scalable=no,target-densitydpi=medium-dpi

Viewport metadata enables device-width layouts. It is not a test of real mobile layout or touch targets.

Keep in mind

Check width=device-width, then inspect overflow, zoom, forms and buttons on a small screen.

Favicon

Passed
The current check passed.

This detects a link declaration for a browser icon, rather than verifying its rendered appearance.

Keep in mind

Check that the icon file loads and remains recognizable on light and dark browser surfaces.

Apple touch icon

Passed
The current check passed.

This detects a touch icon declaration for saved home-screen shortcuts.

Keep in mind

Review the icon’s dimensions, padding and background, then inspect it on an actual device.

Modern images

Needs review
0/31

This detects WebP/AVIF from img src/srcset extensions and picture source types. Images whose format cannot be inferred from HTML, such as extensionless CDN URLs, may not be reflected in the count.

Recommended action

Compare quality and file size, and inspect the actual delivered format in browser developer tools.

Targets and suggested changes

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG

HTML response line 184 · /html/body/div[1]/div[1]/div[1]/a/img

Convert this file to WebP/AVIF and use the actual converted URL. Do not merely rename its extension. Keep it if the CDN already serves a modern format.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="">
Example - adapt to the actual content and environment
<picture>
  <source srcset="[converted-image.webp]" type="image/webp">
  <img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="">
</picture>

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG

HTML response line 212 · /html/body/div[1]/div[2]/div[1]/a/img

Convert this file to WebP/AVIF and use the actual converted URL. Do not merely rename its extension. Keep it if the CDN already serves a modern format.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="">
Example - adapt to the actual content and environment
<picture>
  <source srcset="[converted-image.webp]" type="image/webp">
  <img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="">
</picture>

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG

HTML response line 275 · /html/body/div[3]/div/div[1]/div[1]/div/a/img

Convert this file to WebP/AVIF and use the actual converted URL. Do not merely rename its extension. Keep it if the CDN already serves a modern format.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="">
Example - adapt to the actual content and environment
<picture>
  <source srcset="[converted-image.webp]" type="image/webp">
  <img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="">
</picture>

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG

HTML response line 286 · /html/body/div[3]/div/div[1]/div[2]/div/img

Convert this file to WebP/AVIF and use the actual converted URL. Do not merely rename its extension. Keep it if the CDN already serves a modern format.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="">
Example - adapt to the actual content and environment
<picture>
  <source srcset="[converted-image.webp]" type="image/webp">
  <img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="">
</picture>

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG

HTML response line 296 · /html/body/div[3]/div/div[1]/div[3]/div/img

Convert this file to WebP/AVIF and use the actual converted URL. Do not merely rename its extension. Keep it if the CDN already serves a modern format.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG" alt="무표식 실시간 표면유도 방사선 치료">
Example - adapt to the actual content and environment
<picture>
  <source srcset="[converted-image.webp]" type="image/webp">
  <img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG" alt="무표식 실시간 표면유도 방사선 치료">
</picture>

31 targets; the first five are shown. Review the full saved list in the details below.

Lazy loading

Needs review
0/31

This detects loading="lazy" on img elements. Pages with few images can pass the tool’s heuristic without it.

Recommended action

Consider lazy loading below-the-fold images while keeping prominent first-screen images promptly available.

Targets and suggested changes

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG

HTML response line 184 · /html/body/div[1]/div[1]/div[1]/a/img

Add loading="lazy" only if this image is below the initial viewport. Keep prominent initial-viewport images eager.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/4/YoYbTRCtmruZh6e0.JPG" alt="" loading="lazy">

Targethttps://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG

HTML response line 212 · /html/body/div[1]/div[2]/div[1]/a/img

Add loading="lazy" only if this image is below the initial viewport. Keep prominent initial-viewport images eager.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupWindow/PopupImageUpload/2026/9/yLGHWkQqh7Jusjjj.JPG" alt="" loading="lazy">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG

HTML response line 275 · /html/body/div[3]/div/div[1]/div[1]/div/a/img

Add loading="lazy" only if this image is below the initial viewport. Keep prominent initial-viewport images eager.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/9/Kf4QDKsf8NVWZJvU.PNG" alt="" loading="lazy">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG

HTML response line 286 · /html/body/div[3]/div/div[1]/div[2]/div/img

Add loading="lazy" only if this image is below the initial viewport. Keep prominent initial-viewport images eager.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/6/x28U9UwBI7IN1b16.PNG" alt="" loading="lazy">

Targethttps://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG

HTML response line 296 · /html/body/div[3]/div/div[1]/div[3]/div/img

Add loading="lazy" only if this image is below the initial viewport. Keep prominent initial-viewport images eager.

View evidence and example changes
Observed content
<img src="/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG" alt="무표식 실시간 표면유도 방사선 치료">
Example - adapt to the actual content and environment
<img src="https://gnah.co.kr/attach/IMAGE/PopupMgr/PopupZoneUpload/2026/2/32xtHyAYPXg8lAlm.PNG" alt="무표식 실시간 표면유도 방사선 치료" loading="lazy">

31 targets; the first five are shown. Review the full saved list in the details below.

05

Technical checks

8 checks

Doctype

Passed
html

The doctype declaration helps browsers render HTML in standards mode.

Keep in mind

Place <!doctype html> at the start of the document and check for unintended output before it.

CSS files

Needs review
16

Tool heuristic: up to 4 external files

This counts external stylesheet declarations. Count alone does not measure transfer size, caching or render blocking.

Recommended action

Inspect duplicate or unused CSS and render blocking, then prioritize changes using actual performance measurements.

Targets and suggested changes

Targethttps://gnah.co.kr/resources/_Css/core/jquery-ui-1.9.2.custom.min.css

HTML response line 26 · /html/head/link[1]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<link rel="stylesheet" type="text/css" href="/resources/_Css/core/jquery-ui-1.9.2.custom.min.css">

Targethttps://gnah.co.kr/resources/_Css/common/popup.css

HTML response line 27 · /html/head/link[2]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<link rel="stylesheet" type="text/css" href="/resources/_Css/common/popup.css">

Targethttps://gnah.co.kr/resources/_Css/common/common.css?

HTML response line 41 · /html/head/link[3]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<link rel="stylesheet" type="text/css" href="/resources/_Css/common/common.css?">

Targethttps://gnah.co.kr/resources/_Css/common/webfont.css

HTML response line 42 · /html/head/link[4]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<link rel="stylesheet" type="text/css" href="/resources/_Css/common/webfont.css">

Targethttps://gnah.co.kr/resources/_Css/common/board.css?

HTML response line 43 · /html/head/link[5]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<link rel="stylesheet" type="text/css" href="/resources/_Css/common/board.css?">

16 targets; the first five are shown. Review the full saved list in the details below.

JavaScript files

Needs review
19

Tool heuristic: up to 6 external files

This counts script elements with src attributes. File count alone cannot measure execution cost or responsiveness.

Recommended action

Review duplicated scripts and expensive startup work; consider defer, async or delayed execution where appropriate.

Targets and suggested changes

Targethttps://gnah.co.kr/resources/_Js/core/jquery-1.11.3.min.js

HTML response line 30 · /html/head/script[1]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<script src="/resources/_Js/core/jquery-1.11.3.min.js"> </script>

Targethttps://gnah.co.kr/resources/_Js/core/jquery-ui-1.9.2.custom.min.js

HTML response line 31 · /html/head/script[2]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<script src="/resources/_Js/core/jquery-ui-1.9.2.custom.min.js"></script>

Targethttps://gnah.co.kr/resources/_Js/jquery-ui-timepicker-addon.js

HTML response line 32 · /html/head/script[3]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<script src="/resources/_Js/jquery-ui-timepicker-addon.js"></script>

Targethttps://gnah.co.kr/resources/_Js/core/common_base_util.js

HTML response line 35 · /html/head/script[4]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<script src="/resources/_Js/core/common_base_util.js"></script>

Targethttps://gnah.co.kr/resources/_Js/browser.detect.js

HTML response line 36 · /html/head/script[5]

This file is referenced by the page. Find duplicate tags and remove or conditionally load files that are unused here. File count alone does not establish a defect in this file.

View evidence and example changes
Observed content
<script src="/resources/_Js/browser.detect.js"></script>

19 targets; the first five are shown. Review the full saved list in the details below.

Compression

Needs review
The expected configuration was not detected.

This checks the HTML Content-Encoding header. Compression can reduce transfer size, with savings depending on the response.

Recommended action

Review text compression on the server or CDN, treating already compressed image formats separately.

Targets and suggested changes

Targethttps://gnah.co.kr/kor/Main.do

Server / CDN compression settings

Enable actual gzip/Brotli compression for this response and verify transfer size. Do not manually add Content-Encoding without compressing the body.

View evidence and example changes
Example - adapt to the actual content and environment
Content-Encoding: gzip

Security headers

Passed
3/6

Tool heuristic: at least 3 of 6 selected headers present

This detects selected security-related response headers. Their count does not establish policy quality or protection.

Keep in mind

Review CSP, HSTS and other values for the application, then test for blocked resources or broken functionality.

HTTPS

Passed
https://gnah.co.kr/kor/Main.do

This checks whether the final analyzed page used HTTPS. It is not a security audit of the whole site.

Keep in mind

Review certificate validity, mixed content and HTTPS on important linked pages and forms.

HTTPS redirect

Passed
https://gnah.co.kr/kor/Main.do

This checks whether a request starting over HTTP ends on HTTPS.

Keep in mind

Configure consistent HTTP-to-HTTPS redirects and check for unnecessary chains or loops.

W3C validity

Not checked
Not verified in this analysis.

These are HTML validation results from W3C Nu, not a ranking, accessibility or security certification.

Recommended action

Check network restrictions and provider availability before retrying. An unknown result is not a confirmed failure or a zero score.

CSS files and locations16 saved

Up to 100 files per type are saved. File count alone does not establish a defect in any file.

URLHTML response location
https://gnah.co.kr/resources/_Css/core/jquery-ui-1.9.2.custom.min.css26 · /html/head/link[1]
https://gnah.co.kr/resources/_Css/common/popup.css27 · /html/head/link[2]
https://gnah.co.kr/resources/_Css/common/common.css?41 · /html/head/link[3]
https://gnah.co.kr/resources/_Css/common/webfont.css42 · /html/head/link[4]
https://gnah.co.kr/resources/_Css/common/board.css?43 · /html/head/link[5]
https://gnah.co.kr/resources/_Css/common/board.rspnsv.css?44 · /html/head/link[6]
https://gnah.co.kr/resources/_Css/common/prg.style.css?45 · /html/head/link[7]
https://gnah.co.kr/resources/_Css/plugin/jquery.mCustomScrollbar.css48 · /html/head/link[8]
https://gnah.co.kr/resources/_Css/core/core.common.css50 · /html/head/link[9]
https://gnah.co.kr/resources/_Css/core/core.style.css51 · /html/head/link[10]
https://gnah.co.kr/resources/_Css/core/core.program.default.style.css52 · /html/head/link[11]
https://gnah.co.kr/resources/_Templet/korLayout.css?styleCss=bGF5b3V0X2tvcixnbmF2aV9rb3IsbG9nb19rb3IsaGVhZGVyX2tvcixzdWJtZW51X2tvcixmb290ZXJfa29y53 · /html/head/link[12]
https://gnah.co.kr/resources/_Css/plugin/owl.carousel.min.css59 · /html/head/link[13]
https://gnah.co.kr/resources/_Css/plugin/owl.theme.default.min.css60 · /html/head/link[14]
https://gnah.co.kr/resources/_Templet/Main/main_kor/main_kor.css?dt=20261025120 · /html/head/link[18]
https://gnah.co.kr/resources/Main/kormainModule.css?styleCss=bWFpbnZpc3VhbC1UTVBMMDAsbXBvcHpvbmUtVE1QTDAwLG1pY2Jhbi1UTVBMMDAsbWljYmFuMi1UTVBMMDAsbWltYmFuLVRNUEwwMCxtdGFiYm9hcmQtVE1QTDAwLG10YWJnYWxsZXJ5LVRNUEwwMCw=1454 · /html/body/div[4]/article/link
JavaScript files and locations19 saved

Up to 100 files per type are saved. File count alone does not establish a defect in any file.

URLHTML response location
https://gnah.co.kr/resources/_Js/core/jquery-1.11.3.min.js30 · /html/head/script[1]
https://gnah.co.kr/resources/_Js/core/jquery-ui-1.9.2.custom.min.js31 · /html/head/script[2]
https://gnah.co.kr/resources/_Js/jquery-ui-timepicker-addon.js32 · /html/head/script[3]
https://gnah.co.kr/resources/_Js/core/common_base_util.js35 · /html/head/script[4]
https://gnah.co.kr/resources/_Js/browser.detect.js36 · /html/head/script[5]
https://gnah.co.kr/resources/_Plugin/jquery.TabMenu/jquery.TabMenu.js38 · /html/head/script[6]
https://gnah.co.kr/resources/_Js/comm.LayerPopup.js39 · /html/head/script[7]
https://gnah.co.kr/resources/_Js/jquery/jquery.mCustomScrollbar.js47 · /html/head/script[8]
https://gnah.co.kr/resources/homepage/kor/_Js/common.js?dt=2026102554 · /html/head/script[9]
https://gnah.co.kr/resources/_Js/jquery/owl.carousel.min.js58 · /html/head/script[10]
https://gnah.co.kr/resources/_Templet/Layout/layout_kor/Js/common.js63 · /html/head/script[11]
https://www.googletagmanager.com/gtag/js?id=G-ZLTK75TV0F79 · /html/head/script[12]
https://wcs.naver.net/wcslog.js91 · /html/head/script[14]
https://gnah.co.kr/resources/_Js/common.simple.js121 · /html/head/script[17]
https://gnah.co.kr/resources/_Js/common.siteLayerPopup.js236 · /html/body/div[1]/script[3]
https://gnah.co.kr/resources/_Js/jquery/jquery.cs_widepop1.js353 · /html/body/script[2]
https://gnah.co.kr/resources/_Js/common.base.js2672 · /html/body/script[4]
https://gnah.co.kr/resources/_Templet/Header/header_kor/Js/topmenu.js2673 · /html/body/script[5]
https://gnah.co.kr/resources/_Templet/Main/main_kor/Js/layout_main.js2674 · /html/body/script[6]
Security response headersView values
strict-transport-security
max-age=31536000 ; includeSubDomains
content-security-policy
Not found
x-content-type-options
nosniff
x-frame-options
SAMEORIGIN
referrer-policy
Not found
permissions-policy
Not found
W3C messages0 saved

The external service is unavailable. Please try again later.

06

Search and AI crawlers

4 checks

Robots.txt

Passed
robots.txt

This checks the robots.txt response. File presence does not verify all crawler permissions or actual indexing.

Keep in mind

Review bot and path rules for your intended policy. Protect private information with authentication and access controls.

XML Sitemap

Needs review
The expected configuration was not detected.

This detects a sitemap format at a declared or default URL. It does not crawl and validate every listed URL.

Recommended action

Include intended canonical URLs and meaningful update dates. Declare a custom sitemap location in robots.txt.

Targets and suggested changes

Targethttps://gnah.co.kr/sitemap.xml

/sitemap.xml / robots.txt

Generate XML using real canonical URLs and declare the working location in robots.txt. Link an existing custom sitemap instead of duplicating it.

View evidence and example changes
Example - adapt to the actual content and environment
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>https://gnah.co.kr/kor/Main.do</loc></url></urlset>

llms.txt

Needs review
The expected configuration was not detected.

This checks for a text response at /llms.txt. Its presence does not guarantee use by an AI service or search visibility.

Recommended action

If you publish one, describe public resources accurately and keep its content and links current.

Targets and suggested changes

Targethttps://gnah.co.kr/llms.txt

/llms.txt

If desired, publish UTF-8 text at the root and add real public documentation links. This is optional.

View evidence and example changes
Example - adapt to the actual content and environment
# 강릉아산병원

- [Home](https://gnah.co.kr/kor/Main.do)

AI crawlers

Passed
AI search/answer bots allowed 5/5 · training bots allowed 3/3

Passes when every AI search/answer bot is allowed; training bots are shown for reference only

This interprets root-path robots.txt rules for five AI search/answer bots (which read pages to cite them in answers) and three training bots. Only the search/answer bots decide the result; training bots are shown for reference. Actual citations are not checked.

Keep in mind

Allow the search/answer bots if you want to be cited in AI answers. Blocking training crawlers is a policy choice and does not affect this result.

Bot access to the root path

OAI-SearchBot Search/answerAllowed
ChatGPT-User Search/answerAllowed
Claude-SearchBot Search/answerAllowed
Claude-User Search/answerAllowed
PerplexityBot Search/answerAllowed
GPTBot TrainingAllowed
ClaudeBot TrainingAllowed
Google-Extended TrainingAllowed
robots.txt sourceExpand 
User-Agent: *
Allow: /
Disallow: /_Admin
Disallow: /_UPLOAD
Disallow: /resources
Disallow: /downloadRun.do
Disallow: /*Board.do
Disallow: /*delete*
Disallow: /*Delete*
Disallow: /*update*
Disallow: /*Update*
Disallow: /*Proc.do
Disallow: /*ajx_json
Disallow: /attach
Disallow: /*TotalSearch*
Disallow: /*upload*
Allow: /$
07

PageSpeed Insights

External performance test

Run Google Lighthouse performance, accessibility, best practices and SEO checks. Device-specific results are cached for one day and are separate from the overall score above.