Signature Pad is a JavaScript library for drawing smooth signatures on HTML5 canvas.
The library solves the problem of capturing handwritten signatures in web applications by rendering smooth, natural-looking strokes on canvas. It uses variable width Bézier curve interpolation based on Square's Smoother Signatures approach, which adapts line width based on drawing velocity to create signatures that feel responsive and natural. The implementation has no external dependencies and works across modern desktop and mobile browsers.
Developers should choose this tool if they need signature capture in web forms or applications where a lightweight, dependency-free solution is preferred. It suits projects ranging from simple signature collection to more complex drawing applications. The library provides fine-grained control through options like minimum and maximum line width, throttling for performance tuning, and customizable colors for both pen and background. The demo and accompanying examples show how to handle practical concerns like window resizing and high DPI screens, which are important for production deployments.
The project maintains active test coverage through automated testing workflows. Development activity shows consistent engagement with the codebase through regular updates and maintenance of the TypeScript implementation.
