Your Wi-fi can see you without camera and count the heartbeat
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May 16, 2026 - JavaScript
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privicy
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⚡ SpeedTools is a fast, privacy-first collection of free online tools that run entirely in your browser. No login, no ads, no tracking — just clean, powerful utilities built for students, developers, creators & everyday users. 🔒⚡🌍
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Feb 13, 2026 - HTML
🛡️ Privacy-first batch watermark tool, fully offline, no server needed. 隐私优先的批量图片水印工具 — 100% 浏览器端处理，零上传、零服务器、完全离线。
javascript html canvas offline watermark image-watermark no-server browser-tool batch-watermark privicy
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Mar 7, 2026 - HTML
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