PDF Signer is a free, browser-based tool for adding handwritten signatures to PDF documents in seconds. Draw your signature with mouse, trackpad, or touchscreen, save unlimited signatures in your personal library, and place them precisely using drag-and-drop positioning with real-time preview. It supports multi-page signing, instant PDF download with embedded signatures, and 100% private client-side processing (no uploads, no registration, no watermarks).
https://pdfsigner.org/