Catalog / hisacademy.co.kr
65

SEO audit for hisacademy.co.kr

국제학교 입학·IB/AP/SAT 학원 | HIS헤럴드교육센터

other

Health 65/100 (fair) · 38 pages crawled · generated 2026-08-26

Download Markdown report (feed to ChatGPT / Claude / Cursor)

국제학교 입학준비부터 IB, AP, SAT, GPA 내신관리까지 HIS헤럴드교육센터에서 준비하세요. 1:1 맞춤 로드맵과 레벨테스트 기반 관리로 국내외 국제학교·외국인학교 입시를 체계적으로 대비합니다.

38
pages crawled
37
indexable pages
0
errors
70
warnings
327
notices
0
orphan pages
0
broken links
Category breakdown
CategoryScoreErrorsWarningsNotices
Images 79 0 27 27
Crawlability 92 0 10 0
Duplicate 93 0 9 4
Meta Description 93 0 9 0
Performance 94 0 7 112
Agent Readiness 98 0 3 27
Content 98 0 3 28
Headings 99 0 1 0
Rendering 99 0 1 0
Links 100 0 0 4
Security 100 0 0 55
Sitemap 100 0 0 1
Social 100 0 0 37
Structured Data 100 0 0 28
URL 100 0 0 4
Findings

Warnings (10 rules)

warning Control has no accessible name

Rule agent.control_no_name · Agent Readiness · 3 occurrence(s)

warning Thin content (low word count)

Rule content.thin · Content · 3 occurrence(s)

warning Duplicate page content

Rule duplicate.content · Duplicate · 2 occurrence(s)

warning Duplicate <title> across pages

Rule duplicate.title · Duplicate · 7 occurrence(s)

warning Incomplete/empty response after retries (likely transient — re-crawl)

Rule fetch.incomplete · Crawlability · 10 occurrence(s)

warning Missing <h1>

Rule h1.missing · Headings · 1 occurrence(s)

warning Images missing alt text

Rule images.missing_alt · Images · 27 occurrence(s)

warning Missing meta description

Rule meta_desc.missing · Meta Description · 9 occurrence(s)

warning Render-blocking script in <head> (no defer/async)

Rule perf.render_blocking · Performance · 7 occurrence(s)

warning Content only rendered by JavaScript (invisible to non-JS crawlers & AI)

Rule rendering.js_shell · Rendering · 1 occurrence(s)

  • https://www.hisacademy.co.kr/main/chat_talk — Raw HTML has 0 words and 0 links — this page is built by JavaScript in the browser. Googlebot renders JS but delays it, and most crawlers and AI assistants (ChatGPT, Perplexity, Claude) don't run JavaScript at all, so to them the page looks empty. Server-render or pre-render your main content and navigation.

Notices (21 rules)

notice Heading levels skip a level

Rule agent.heading_skip · Agent Readiness · 26 occurrence(s)

notice No llms.txt for AI agents

Rule agent.llms_txt_missing · Agent Readiness · 1 occurrence(s)

notice Duplicate meta description across pages

Rule duplicate.meta_desc · Duplicate · 4 occurrence(s)

notice Likely hero image lacks fetchpriority=high

Rule images.hero_no_fetchpriority · Performance · 27 occurrence(s)

  • https://www.hisacademy.co.kr/ — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/auth/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/auth/sub2000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub2000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub3000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub4000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub5000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub6000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/curriculum/sub7000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub2000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub3000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub4000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub4000/A1 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/international/sub4000_view/A1/21 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub2000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub3000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub4000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub5000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/intro/sub6000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/news/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/news/sub2000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://www.hisacademy.co.kr/recruit/sub1000 — the likely hero/LCP image (apply_ns_flag.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.

notice Images without width/height (layout shift / CLS)

Rule images.missing_dimensions · Images · 27 occurrence(s)

notice Internal link has no anchor text / accessible name

Rule links.no_anchor_text · Links · 2 occurrence(s)

notice Page has only one internal inlink (fragile crawl path)

Rule links.single_inlink · Links · 2 occurrence(s)

notice Legacy <meta name=keywords> tag present (Google ignores it)

Rule meta.keywords_present · Content · 28 occurrence(s)

notice Missing Open Graph tags

Rule og.missing · Social · 9 occurrence(s)

notice Large DOM (over 1500 elements) slows rendering & interaction

Rule perf.dom_size_large · Performance · 1 occurrence(s)

  • https://www.hisacademy.co.kr/ — the page has 2747 DOM elements (recommended maximum is around 1500) — a large DOM increases style-recalculation, layout and paint cost, hurting LCP and INP. Flatten deep nesting, paginate long lists/tables, and lazy-render off-screen elements.

notice Legacy image format (jpg/png/gif) with no next-gen fallback

Rule perf.images_legacy_format · Performance · 27 occurrence(s)

  • https://www.hisacademy.co.kr/ — 67 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/auth/sub1000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/auth/sub2000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub1000 — 25 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub2000 — 7 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub3000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub4000 — 14 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub5000 — 5 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub6000 — 9 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/curriculum/sub7000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub1000 — 31 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub2000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub3000 — 14 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub4000 — 10 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub4000/A1 — 10 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/international/sub4000_view/A1/21 — 5 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub1000 — 5 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub2000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub3000 — 5 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub4000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub5000 — 41 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/intro/sub6000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/news/sub1000 — 6 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/news/sub2000 — 6 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://www.hisacademy.co.kr/recruit/sub1000 — 4 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.

notice No ETag header (no conditional GET for unchanged pages)

Rule perf.no_etag · Performance · 28 occurrence(s)

  • https://www.hisacademy.co.kr/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/auth/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/auth/sub2000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub2000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub3000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub4000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub5000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub6000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/curriculum/sub7000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub2000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub3000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub4000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub4000/A1 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/international/sub4000_view/A1/21 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub2000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub3000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub4000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub5000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/intro/sub6000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/main/chat_talk — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/news/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://www.hisacademy.co.kr/recruit/sub1000 — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.

notice No Last-Modified header (no conditional GET for unchanged pages)

Rule perf.no_last_modified · Performance · 28 occurrence(s)

  • https://www.hisacademy.co.kr/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/auth/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/auth/sub2000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub2000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub3000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub4000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub5000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub6000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/curriculum/sub7000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub2000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub3000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub4000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub4000/A1 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/international/sub4000_view/A1/21 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub2000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub3000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub4000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub5000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/intro/sub6000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/main/chat_talk — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/news/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://www.hisacademy.co.kr/recruit/sub1000 — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.

notice Slow server response

Rule perf.slow_response · Performance · 1 occurrence(s)

notice No structured data detected

Rule schema.none · Structured Data · 28 occurrence(s)

notice Missing recommended security headers

Rule security.missing_headers · Security · 28 occurrence(s)

notice target=_blank link without rel=noopener (tab-napping)

Rule security.unsafe_cross_origin_links · Security · 27 occurrence(s)

notice Indexable page not listed in sitemap

Rule sitemap.orphan_not_listed · Sitemap · 1 occurrence(s)

notice Missing Twitter Card tag

Rule twitter.missing · Social · 28 occurrence(s)

notice Underscores in URL path (prefer hyphens)

Rule url.underscores · URL · 2 occurrence(s)

notice Uppercase letters in URL path

Rule url.uppercase · URL · 2 occurrence(s)

Pages (showing 38 of 38)
URLStatusIndexableWordsIn-links
https://www.hisacademy.co.kr/
국제학교 입학·IB/AP/SAT 학원 | HIS헤럴드교육센터		 200 yes 6992 27
https://www.hisacademy.co.kr/auth/sub1000
로그인 | HIS헤럴드교육센터		 200 yes 166 27
https://www.hisacademy.co.kr/auth/sub2000
회원가입 | HIS헤럴드교육센터		 200 yes 182 27
https://www.hisacademy.co.kr/cs/ 200 yes 0 27
https://www.hisacademy.co.kr/cs/sub1000 200 yes 0 27
https://www.hisacademy.co.kr/curriculum/ 200 yes 0 27
https://www.hisacademy.co.kr/curriculum/sub1000
IB 학원·국제학교 내신관리 | HIS헤럴드교육센터		 200 yes 363 27
https://www.hisacademy.co.kr/curriculum/sub2000
IGCSE·MYP 국제학교 내신관리 | HIS헤럴드교육센터		 200 yes 317 27
https://www.hisacademy.co.kr/curriculum/sub3000
AP·Digital SAT 시험 대비 학원 | HIS헤럴드교육센터		 200 yes 314 27
https://www.hisacademy.co.kr/curriculum/sub4000
Key Stage 3·Pre IGCSE 내신관리 | HIS헤럴드교육센터		 200 yes 454 27
https://www.hisacademy.co.kr/curriculum/sub5000
TOEFL·IELTS·PSAT 시험 대비 | HIS헤럴드교육센터		 200 yes 427 27
https://www.hisacademy.co.kr/curriculum/sub6000
듀오링고·PTE 시험 대비 수업 | HIS헤럴드교육센터		 200 yes 330 27
https://www.hisacademy.co.kr/curriculum/sub7000
듀오링고·PTE 시험 대비 수업 | HIS헤럴드교육센터		 200 yes 509 27
https://www.hisacademy.co.kr/international/ 200 yes 0 27
https://www.hisacademy.co.kr/international/sub1000
국제학교 입학시험 준비·제주 국제학교 대비 | HIS헤럴드교육센터		 200 yes 649 27
https://www.hisacademy.co.kr/international/sub2000
MAP·ISEE·SSAT 국제학교 입학시험 대비 | HIS헤럴드교육센터		 200 yes 439 27
https://www.hisacademy.co.kr/international/sub3000
국내 외국인학교 입학준비·MAP Essay Interview | HIS헤럴드교육센터		 200 yes 341 27
https://www.hisacademy.co.kr/international/sub4000
국제학교 Math 인강·주니어 수학 온라인 강의 | HIS헤럴드교육센터		 200 yes 320 27
https://www.hisacademy.co.kr/intro/ 200 yes 0 27
https://www.hisacademy.co.kr/intro/sub1000
국제학교 입학·AP/IB/SAT 교육기관 | HIS헤럴드교육센터		 200 yes 256 27
https://www.hisacademy.co.kr/intro/sub2000
국제학교 입학 FAQ·상담 안내 | HIS헤럴드교육센터		 200 yes 721 27
https://www.hisacademy.co.kr/intro/sub3000
서울 국제학교 입학 학원 위치 | HIS헤럴드교육센터		 200 yes 289 27
https://www.hisacademy.co.kr/intro/sub4000
국제학교 입학 레벨테스트·MAP 테스트 | HIS헤럴드교육센터		 200 yes 325 27
https://www.hisacademy.co.kr/intro/sub5000
국제학교 IB/AP/SAT 전문 강사진 | HIS헤럴드교육센터		 200 yes 319 27
https://www.hisacademy.co.kr/intro/sub6000
국제학교 전과목 내신관리·IB/AP/SAT 수강과목 | HIS헤럴드교육센터		 200 yes 437 27
https://www.hisacademy.co.kr/news/ 200 yes 0 27
https://www.hisacademy.co.kr/news/sub1000
학원소식 합격자명단 | HIS헤럴드교육센터		 200 yes 267 27
https://www.hisacademy.co.kr/news/sub2000
학원소식 공지사항 | HIS헤럴드교육센터		 200 yes 238 27
https://www.hisacademy.co.kr/recruit/ 200 yes 0 27
https://www.hisacademy.co.kr/recruit/sub1000
인재채용 | HIS헤럴드교육센터		 200 yes 221 27
https://www.hisacademy.co.kr/main/chat_talk
카카오채널톡 | HIS헤럴드교육센터		 200 yes 0 26
https://www.hisacademy.co.kr/mypage/sub1000 200 yes 0 26
https://www.hisacademy.co.kr/international/sub4000/A1
국제학교 Math 인강·주니어 수학 온라인 강의 | HIS헤럴드교육센터		 200 yes 320 6
https://www.hisacademy.co.kr/payment/sub1000/21 200 yes 0 3
https://www.hisacademy.co.kr/international/sub4000_view/A1/21
국제학교 입학준비 주니어인강 | HIS헤럴드교육센터		 200 yes 546 2
https://www.hisacademy.co.kr/news/sub2000/?page=2
학원소식 공지사항 | HIS헤럴드교육센터		 200 yes 207 1
https://www.hisacademy.co.kr/news/sub2100/8?page=1
학원소식 공지사항 | HIS헤럴드교육센터		 200 yes 412 1
https://www.hisacademy.co.kr/cs/sub2000 0 no 0 27

Audit your own site — free

157 checks, internal PageRank, render-diff. No signup, results in ~30s.

Scan your site →