# BeaverCheck Audit Report — https://line.me

**Date:** April 16, 2026  
**URL:** https://line.me  
**Overall Grade:** C (72/100)  
**Report:** https://beavercheck.com/results/6f2f844e-3203-4fb7-aa8c-2db94b6f6382

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[CRITICAL]** Page weighs 41.4 MB (41.2 MB transferred) — Performance > Page Weight Budget
4. **[CRITICAL]** 3 link(s) with no accessible text — Accessibility > Link & Button Quality
5. **[CRITICAL]** 8 image-only link(s) without alt text — Accessibility > Link & Button Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 63 |
| Accessibility | 87 |
| Best Practices | 100 |
| SEO | 100 |

---

## Security

### Security Headers (F — 20/100)

*2 of 10 headers properly configured*

- **[WARNING]** HSTS max-age is too short (43200s, should be ≥ 31536000s) — A short max-age leaves a window for downgrade attacks. Set max-age to at least 31536000 (1 year).
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is present without version info

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 147 days)
- **[PASS]** Certificate chain has 2 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 2 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 3 external resources have SRI*

- **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External link from cdn.jsdelivr.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.
- **[WARNING]** External script from cdn.jsdelivr.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[PASS]** security.txt is present — good practice
- **[PASS]** No sensitive files exposed

### Email Security (D — 50/100)

*DMARC: none*

- **[WARNING]** DMARC policy is none — monitoring only — This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (F — 0/100)

*41.2 MB transferred, 169 requests*

- **[CRITICAL]** Page weighs 41.4 MB (41.2 MB transferred)
- **[WARNING]** Images are 41.1 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[WARNING]** 169 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 8.6 g CO2 per page load

### Third-Party Impact (D — 50/100)

*100% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 100% of page weight (41.2 MiB of 41.2 MiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (B — 75/100)

*142 images, 0 KB saveable*

- **[PASS]** All images are well-optimized

### JS Execution Cost (D — 40/100)

*3246ms total JS execution*

- **[WARNING]** https://www.line.me/en/: 1548ms CPU time
- **[WARNING]** Unattributable: 1222ms CPU time
- **[WARNING]** https://www.line.me/static/js/common.min.js: 476ms CPU time
- **[WARNING]** Third-party scripts: 3246ms (100% of total)

### Font Loading (A+ — 100/100)

*1 fonts (17 KB)*

- **[INFO]** 1 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (A+ — 100/100)

*6 scripts, 42 KB unused*

- **[WARNING]** https://cdn.jsdelivr.net/npm/swiper@11/swiper-bund...: 42 KB unused (97%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 42 KB

### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*No optimization needed*

- **[PASS]** No resource hint issues

### Page Weight Inventory (D — 45/100)

*169 resources · 41.2 MB · 42 KB savings available*

- **[WARNING]** Page weight 40.2 MB over 1MB target
- **[WARNING]** 168 third-party resources (100% of weight)
- **[INFO]** 46 resources over 200KB

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (B — 88/100)

*51 links checked, 48 healthy, 2 broken*

- **[WARNING]** 48 of 51 links are healthy
- **[WARNING]** Broken link: https://www.googletagmanager.com/gtm.js?id=GTM-T3SK6H7 — Found in <script src>. Returns HTTP 404.
- **[WARNING]** Broken link: https://line.me/static/934a804ce9643bf673711c7f1a4f2b05/1... — Found in <img src>. Returns HTTP 403.
- **[INFO]** Long redirect chain: https://chrome.google.com/webstore/detail/line/... (3 hops)

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (A — 90/100)

*Open Graph tags are well configured for social sharing.*

- **[INFO]** Missing og:url — The og:url tag specifies the canonical URL for the shared content.
- **[INFO]** Missing og:site_name — The og:site_name tag displays the website name in social previews.

### Structured Data (C — 40/100)

*No structured data (JSON-LD) found.*

- **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results.

---

## Infrastructure

### DNS Records (A — 85/100)

*1 A records, 249 ms lookup*

- **[PASS]** Resolves to 1 IPv4 address(es)
- **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down.
- **[INFO]** No IPv6 (AAAA) records
- **[PASS]** 4 nameserver(s) configured
- **[PASS]** 4 mail exchanger(s) configured
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[PASS]** SPF record present in TXT
- **[WARNING]** DNS resolution is slow (249 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider.

### Redirect Chain (B — 70/100)

*1 redirect(s), 1125 ms total*

- **[PASS]** Single redirect
- **[INFO]** WWW normalization redirect
- **[INFO]** Uses 302 (temporary) redirect — If permanent, use 301 instead.
- **[WARNING]** Redirect overhead: 1125 ms total

### IPv6 Readiness (C — 60/100)

*No IPv6 support*

- **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

### Crawlability (B — 80/100)

*robots.txt present, no sitemap*

- **[PASS]** robots.txt is present
- **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently.
- **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

### URL Variants (A+ — 100/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** www/non-www redirect configured correctly (preferred: non-www)
- **[PASS]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*line.me — via MarkMonitor Inc., 18 years, 2 months old, hosted on LINE LY Corporation, JP*

- **[PASS]** Domain registered until Apr 29, 2027 (1 years remaining)
- **[PASS]** Registrar: MarkMonitor Inc.
- **[PASS]** Registrar lock is enabled — Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
- **[PASS]** Hosting: LINE LY Corporation, JP

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (A — 85/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[PASS]** Terms of service link found
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (C — 55/100)

*3 trackers detected*

- **[INFO]** 3 third-party trackers detected — Found 2 analytics, 0 advertising, 0 marketing, 1 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 3 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies.
- **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers.

### Cookie & Tracker Inventory (A+ — 100/100)

*0 cookies · 3 trackers · 0 pre-consent*

- **[INFO]** 3 third-party tracker(s) detected on page

---

## Legal

### Legal Page Ecosystem (F — 35/100)

*1 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at https://line.me/en/terms/policy/, linked from footer.
- **[WARNING]** Terms of Service not detected — No link matching common Terms of Service URL patterns or link text was found. Most websites are expected to have a Terms of Service, especially those collecting user data.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (C — 55/100)

*No copyright notice detected*

- **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership.

### Regulatory Indicators

*0 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** No specific regulatory indicators detected — No strong signals for GDPR, CCPA, ADA, PCI, HIPAA, or COPPA were found. This does not mean these regulations don't apply — it means we didn't detect common technical indicators.

### Third-Party Data Sharing

*1 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** 1 third-party services across 1 categories — 1 third-party services detected across 1 categories: Tag Management (1). Each of these services receives some user data from your site visitors.
- **[INFO]** Google Tag Manager (Tag Management) — Detected via script URL. Typically collects: Orchestrates other tracking scripts, Page views. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (D — 50/100)

*No CDN detected*

- **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

### HTTP Caching (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

### Transport Security (B — 75/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[WARNING]** HSTS max-age is short: 0 days — HSTS max-age should be at least 1 year (31536000 seconds).
- **[INFO]** HSTS missing includeSubDomains — Without includeSubDomains, HSTS only protects the exact domain.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (B — 75/100)

*3 landmarks*

- **[PASS]** <main> landmark present
- **[WARNING]** No <nav> landmark found
- **[WARNING]** Skip navigation link is missing (WCAG 2.4.1) — Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

### Heading Hierarchy (A+ — 100/100)

*4 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (A+ — 100/100)

*All 29 images OK*

- **[PASS]** 29 decorative image(s) correctly marked

### Form Accessibility (A+ — 100/100)

*No form controls*

- **[PASS]** No form controls on this page

### Link & Button Quality (D — 41/100)

*3 issue(s) across 29 links and 0 buttons*

- **[CRITICAL]** 3 link(s) with no accessible text — Links without text are announced as raw URLs by screen readers.
- **[CRITICAL]** 8 image-only link(s) without alt text — Image-only links need alt text on the image (or aria-label on the link) so screen readers can announce them.
- **[WARNING]** 3 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[PASS]** 15 link(s) with descriptive text

---

## UX

### 404 Error Page (C — 65/100)

*HTTP 404, custom page*

- **[PASS]** Correct 404 status code returned
- **[PASS]** Custom styled 404 page
- **[PASS]** Homepage link present on 404 page

### Favicon & Branding (B — 70/100)

*13 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present
- **[PASS]** Multiple icon sizes detected

### Web Manifest (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (D — 40/100)

*No dark mode signals*

- **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 0/100)

*No navigation patterns*

- **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites.

---

## SEO

### Canonical URL (B — 80/100)

*Minor issues*

- **[WARNING]** No canonical tag found — Search engines will determine the canonical URL themselves, which may cause duplicate content issues.

### Meta Tags (A — 85/100)

*Title: 27 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 27 characters — consider expanding
- **[INFO]** Title and H1 have very different wording — Alignment helps users confirm they've reached the right page.

### Content Depth (F — 25/100)

*101 words, Fairly Difficult*

- **[WARNING]** Page has 101 words — thin content — Most well-ranking pages have 300+ words of substantive content.
- **[INFO]** Text-to-HTML ratio is 1% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Fairly Difficult (grade 11)
- **[WARNING]** Thin content — only 101 words

### Internal Links (A+ — 100/100)

*15 internal, 14 external*

- **[PASS]** 15 internal links (52%)
- **[PASS]** 90% of links use descriptive anchor text
- **[INFO]** 15 internal / 14 external links

### Image SEO (A+ — 100/100)

*29 images, 20 descriptive filenames*

- **[INFO]** 9 image(s) have hash/generic filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (F — 15/100)

*11.67g CO2 per view*

- **[CRITICAL]** 11.67g CO2 per page view — This page transfers 41.2 MB, producing an estimated 11.67g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 2.16g, network 2.02g, end-user device 7.49g.
- **[INFO]** At 10,000 monthly views: 1400.2 kg CO2/year — With 10,000 page views per month, this page would generate approximately 1400.2 kg of CO2 annually — equivalent to charging 175020 smartphones.

### Green Hosting (D — 50/100)

*Unknown*

- **[INFO]** Hosting provider could not be identified — Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*100% cached*

- **[PASS]** 100% reduction on repeat visits — Returning visitors download only 8 KB (vs 42189 KB first visit). 168 of 169 resources are served from browser cache, saving 11.67g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.00g CO2 (first visit: 11.67g)

### Carbon Budget (F — 15/100)

*95th percentile*

- **[WARNING]** 11.67g CO2 — above the median website (0.60g) — Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 95th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (A+ — 100/100)

*100% efficient*

- **[PASS]** Transfer efficiency: 100% — Only 41 KB of potential savings identified. Your page is well-optimized for size.

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/6f2f844e-3203-4fb7-aa8c-2db94b6f6382*