監査レポート対象
protonvpn.com
最終監査日 Jul 10, 2026
Performance and AI readiness need significant improvements
The site has strong SEO and best practices scores but suffers from poor performance and low AI readiness. Key issues include slow LCP, high TBT, and lack of structured data and caching strategies.
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カテゴリー別インサイト
LCP is 3002ms which is above the ideal threshold. TBT is 327ms indicating excessive main-thread work.
SEO score is 100 but missing structured data and canonical tags could limit search visibility.
Several accessibility issues related to ARIA roles and touch target size were identified.
Best practices score is 100 but lacks some key elements like CSP headers.
No structured data, no llms.txt, and no content security policy hinder AI agent interaction.
パフォーマンス指標
マーケティング対応度
ウェブ解析
なし
広告ピクセル
なし
ライブチャット
なし
ブログ・コンテンツ
あり
料金ページ
あり
メール取得
なし
AIクローラーのアクセス
ChatGPT
許可
Claude
許可
Perplexity
許可
Gemini
許可
Common Crawl
許可
llms.txt
なし
構造化データ
なし
Instagram競合と比較
改善提案
20 件の問題高Reduce unused CSS
Est savings of 41 KiB
低工数
Reduce unused CSS
Est savings of 41 KiB
修正方法
Use a CSS optimizer to remove unused styles. Implement critical CSS for above-the-fold content and defer non-critical CSS.
インパクト
Reduce initial load size by 41 KiB
高Improve image delivery
Est savings of 115 KiB
中工数
Improve image delivery
Est savings of 115 KiB
修正方法
Convert images to next-gen formats like WebP or AVIF. Implement responsive images using srcset and sizes attributes.
インパクト
Reduce image payload by 115 KiB
高Use efficient cache lifetimes
Est savings of 419 KiB
中工数
Use efficient cache lifetimes
Est savings of 419 KiB
修正方法
Configure HTTP caching headers for static assets. Set long cache durations for resources that do not change frequently.
インパクト
Reduce repeated downloads by 419 KiB
高Reduce JavaScript execution time
1.4 s
高工数
Reduce JavaScript execution time
1.4 s
修正方法
Minify and compress JavaScript files. Use code splitting to load only necessary scripts on initial page load.
インパクト
Reduce JavaScript execution time by 1.4 s
高Minimize main-thread work
2.8 s
高工数
Minimize main-thread work
2.8 s
修正方法
Defer non-critical JavaScript and use lazy loading for off-screen content. Optimize render-blocking resources.
インパクト
Reduce main-thread work by 2.8 s
高Reduce unused JavaScript
Est savings of 26 KiB
中工数
Reduce unused JavaScript
Est savings of 26 KiB
修正方法
Analyze and remove unused JavaScript functions. Use tree shaking to eliminate dead code in bundled files.
インパクト
Reduce JavaScript payload by 26 KiB
高Add structured data
No structured data (JSON-LD) for AI and search engines
中工数
Add structured data
No structured data (JSON-LD) for AI and search engines
修正方法
Implement JSON-LD structured data for key page elements such as organization, product, or article information.
インパクト
Improve AI agent understanding and search engine visibility
高Add llms.txt file
No llms.txt for AI agents
低工数
Add llms.txt file
No llms.txt for AI agents
修正方法
Create an llms.txt file at the root of the domain to specify which pages should be excluded from AI indexing.
インパクト
Ensure compliance with AI agent policies and improve crawl efficiency
高Add Content-Security-Policy header
No Content-Security-Policy header
中工数
Add Content-Security-Policy header
No Content-Security-Policy header
修正方法
Configure a Content-Security-Policy HTTP header to restrict the sources of scripts and other resources.
インパクト
Enhance security and improve AI agent compatibility
中Add canonical link
No canonical link
低工数
Add canonical link
No canonical link
修正方法
Implement a canonical link tag to indicate the preferred version of duplicate content pages.
インパクト
Avoid duplicate content issues and improve search engine indexing
中Fix ARIA role requirements
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
中工数
Fix ARIA role requirements
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
修正方法
Ensure all ARIA roles have properly nested child elements as required. Validate ARIA structure using accessibility tools.
インパクト
Improve screen reader compatibility and user experience for assistive technologies
中Fix ARIA parent-child relationships
`[role]`s are not contained by their required parent element
中工数
Fix ARIA parent-child relationships
`[role]`s are not contained by their required parent element
修正方法
Ensure all ARIA roles are properly nested within their required parent elements. Use semantic HTML where possible.
インパクト
Improve screen reader navigation and accessibility compliance
中Add Content-Security-Policy header
No Content-Security-Policy header
中工数
Add Content-Security-Policy header
No Content-Security-Policy header
修正方法
Configure a Content-Security-Policy HTTP header to restrict the sources of scripts and other resources.
インパクト
Enhance security and improve AI agent compatibility
高Optimize initial server response time
Root document took 330 ms
高工数
Optimize initial server response time
Root document took 330 ms
修正方法
Optimize server-side rendering and reduce backend processing time. Use a CDN to serve static assets closer to users.
インパクト
Reduce initial server response time by 328 ms
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