At least one JSON-LD block with @type and no unreadable blocks
JSON-LD describes entities and relationships in a machine-readable form. Parsing JSON is separate from validating required search feature properties.
Recommended action
Match markup to visible content and validate it with a rich result testing tool. Eligibility does not guarantee display.
Targets and suggested changes
Targethttps://www.data.go.kr/
Response HTML <head> / script[type=application/ld+json]
Use the example JSON in an application/ld+json script only when it matches the page. Fix existing JSON syntax first and validate any rich-result requirements separately.
View evidence and example changes
Observed content
0
Example - adapt to the actual content and environment
There are no warning or unknown checks in this section.
Sharing metadataExpand
Result
No matching metadata found.
Structured data0 types
No parseable JSON-LD was found.
02
Content and images
5 checks
Headings
Needs review
H1 0 / H2 18 / H3 6
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://www.data.go.kr/
Body h1 elements
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
0
Example - adapt to the actual content and environment
<h1>Main topic of this page</h1>
Image alt
Needs review
7 images; 2 with non-empty alt; 5 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.
HTML response line 2734 · /html/body/div[9]/div[1]/section[6]/div/div/div[2]/span/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.
Example - adapt to the actual content and environment
<img src="https://www.data.go.kr/common/portal/img/main/main_info_01.png" alt="Describe the actual image content">
For a decorative image:
<img src="https://www.data.go.kr/common/portal/img/main/main_info_01.png" alt="">
HTML response line 2747 · /html/body/div[9]/div[1]/section[6]/div/div/div[3]/span/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.
Example - adapt to the actual content and environment
<img src="https://www.data.go.kr/common/portal/img/main/main_info_02.png" alt="Describe the actual image content">
For a decorative image:
<img src="https://www.data.go.kr/common/portal/img/main/main_info_02.png" alt="">
HTML response line 2760 · /html/body/div[9]/div[1]/section[6]/div/div/div[4]/span/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.
Example - adapt to the actual content and environment
<img src="https://www.data.go.kr/common/portal/img/main/main_info_03.png" alt="Describe the actual image content">
For a decorative image:
<img src="https://www.data.go.kr/common/portal/img/main/main_info_03.png" alt="">
HTML response line 2773 · /html/body/div[9]/div[1]/section[6]/div/div/div[5]/span/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.
Example - adapt to the actual content and environment
<img src="https://www.data.go.kr/common/portal/img/main/main_info_04.png" alt="Describe the actual image content">
For a decorative image:
<img src="https://www.data.go.kr/common/portal/img/main/main_info_04.png" alt="">
HTML response line 2786 · /html/body/div[9]/div[1]/section[6]/div/div/div[6]/span/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.
Example - adapt to the actual content and environment
<img src="https://www.data.go.kr/common/portal/img/main/main_info_05.png" alt="Describe the actual image content">
For a decorative image:
<img src="https://www.data.go.kr/common/portal/img/main/main_info_05.png" alt="">
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
1.4%
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://www.data.go.kr/
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
1.4%
There are no warning or unknown checks in this section.
Heading structure
Saved headings, up to 50 per level. Expand the H2-H6 lists when needed.
H10
H218
H36
H40
H50
H60
H1
No H1 heading was found.
H2 18View headings
DATA.GO.KR 공공데이터포털
공공데이터
데이터활용
정보공유
이용안내
공공데이터
데이터활용
기업공공데이터 문제해결지원센터
정보공유
이용안내
정부통합인증 사용자 등록 안내
인기 데이터
최신 데이터
데이터 제공/분쟁조정 신청
소식지
공지사항
2026년 시민사회 대상 공공데이터 활용 설문조사
자동등록방지
H3 6View headings
공공데이터
데이터활용
기업공공데이터 문제해결지원센터
정보공유
이용안내
공공데이터, AI로 검색하세요.
Images and alternative text7 saved
Up to 100 images are saved. Review an image’s purpose when its alt text is empty.
HTML response line 2829 · /html/body/div[9]/div[2]/div/div[2]/div/div/a
The query string or underscore triggers this heuristic. Remove tracking-only utm_* parameters from internal links when appropriate. Keep functional parameters. If a path changes, update internal links and redirect the old URL.
HTML response line 3109 · /html/body/footer/div[2]/div[1]/div[2]/div[2]/a[4]
The query string or underscore triggers this heuristic. Remove tracking-only utm_* parameters from internal links when appropriate. Keep functional parameters. If a path changes, update internal links and redirect the old URL.
View evidence and example changes
Observed content
<a href="http://blog.naver.com/nia_korea" class="krds-btn xlarge icon border" target="_blank" title="블로그 새 창 열기">
<span class="sr-only">블로그</span>
<i class="svg-icon ico-blog"></i>
</a>
There are no warning or unknown checks in this section.
Internal links92
External links27
nofollow0
Link destinations, text and attributes119 saved
Up to 300 extracted links. Destination status codes and linked pages are not individually checked.
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
0/7
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.
HTML response line 2734 · /html/body/div[9]/div[1]/section[6]/div/div/div[2]/span/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.
HTML response line 2747 · /html/body/div[9]/div[1]/section[6]/div/div/div[3]/span/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.
HTML response line 2760 · /html/body/div[9]/div[1]/section[6]/div/div/div[4]/span/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.
HTML response line 2773 · /html/body/div[9]/div[1]/section[6]/div/div/div[5]/span/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.
HTML response line 2786 · /html/body/div[9]/div[1]/section[6]/div/div/div[6]/span/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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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://www.data.go.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
# 공공데이터포털
- [Home](https://www.data.go.kr/)
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.
There are no warning or unknown checks in this section.
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.
