Test your website loading speed and performance metrics. Free online page speed checker for Core Web Vitals and SEO.
ウェブサイト 速度 Test is a free online ユーティリティ tool. Your input is processed on secure servers over an encrypted HTTPS connection and nothing is stored. No software to install; works on both phone and desktop.
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
ウェブサイト 速度 Test sends your input over an encrypted HTTPS connection to our servers to complete the processing. Nothing you submit is stored; results are only displayed in your current page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.
ウェブサイト 速度 Test is a free alternative to the following paid tools — see the full comparison: