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SDK Contents

SDK File:

sdk\The SDK files. To be paired with the SDK's sample code
readme.txtReadme for the SDK


The Wacom Ink SDK for signature enables the capture of handwritten electronic signatures on those devices, whether manufactured by Wacom or other major vendors.

This enables multiple use cases for digitizing signature-centric document workflows, whether signatures need to be captured at a fixed location or on mobile devices.

Via the Signature SDK for Javascript, the SDK can be used to create and store handwritten electronic signatures on all major operating systems including Windows, Android, iOS, Mac OS and Linux.

The SDK can also be deployed for applications running on local devices, servers or for web applications, enabling the same signature workflow for all deployment methods.

Facilitating cross-platform compatibility is how Wacom Ink SDK for signature provides the most flexible, powerful and secure way for service providers to add handwritten electronic signatures to their digital workflow solutions.

Application Development

The Wacom Signature Software Development Kit for JavaScript provides the documentation and tools to create signature-enabled applications. No component installations are required and the SDK is platform-independent.

Features of the Wacom SigCaptX Library have been included in this SDK. Below is a comparison table between the two.

FeatureSigCaptXJavaScript SDK
Browser compatibilityAll major browsersAll major browsers. Support is required for WebAssembly and, if users are signing with an STU device, WebHID. See and
Requires local installation of signature libraryYesNo software installation is required.
OS compatibilityWindowsDependent on browser compatibility and device support
LicenseSignatureLite (free)Enterprise license required
Device compatibilityWacom devices: STU or WintabWacom devices and those supporting HTML5 Pointer events
Wizard controlYes for STU devicesNot supported


The samples for the Javascript SDK are hosted on GitHub:


The SDK is available from our website.

The SDK, having previously been composed of a JavaScript and WASM (WebAssembly) component, now also includes an additional JavaScript file, stu-sdk.min.js.

For more information on where to keep the SDK component of the demo, see this guide here