signature_pad is a JavaScript library and drawing tool for capturing handwritten digital signatures on an HTML5 canvas. It provides a handwriting capture interface that transforms raw mouse or touch inputs into smooth, professional-looking lines.
The project uses Bézier curve interpolation to smooth jagged input points into fluid strokes. It supports the configuration of drawing aesthetics, including pen color, background color, and line width, and includes a history management system for undoing and restoring drawing actions.
The library handles the serialization of signature data into point groups and supports exporting captured signatures as SVG, PNG, or JPG image formats. It also provides mechanisms to restore previously captured signatures onto the canvas from saved data points or image URLs.
