Test your website loading speed and performance metrics. Free online page speed checker for Core Web Vitals and SEO.
We noticed most online tools upload your files to remote servers. Since privacy is our core principle, we built this tool to process everything locally in your browser.
はい、完全無料で登録不要です。
はい、モバイルブラウザでタッチ操作に対応しています。
ユーティリティ
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.