WILL™ Technology Overview

WILL™ universal ink layer framework is the fastest, simplest way to add digital ink to any type of app. It connects hardware and software providing intuitive and high quality digital inking.

With WILL™, we bring Wacom’s heritage and expertise of high quality pen and ink technology to our partners and independent developers. Designed as a modular set, each of the single WILL™ SDKs offers great options – combine them and you will find nearly limitless solutions to enhance your apps and products with innovative digital ink features.

Currently, there are three SDKs to choose from, five more will be launched during 2017.

Tested and Proven

Remove risk, decrease development time, and reduce costs to implement a significant new feature. Don't reinvent the wheel: enhance your apps, software, service or products with Wacom's advanced inking technology WILL™  – there is a tested and proven WILL™ SDK ready for you.

Technical Support

We fully support and help with the implementation of the technology in more complex environments. Experienced developers from the WILL™ team can answer any questions you have during your integration, all at no cost. For more hands-on integration support, we can also work alongside your engineers.  Contact us for pricing information. 

Easy to Register

To get started, register for your Wacom ID, sign the required legal agreement, and get started with your new digital ink application. The WILL™ SDK editions are  available now  free for evaluation.





WILL SDK for ink


The WILL™ SDK for ink allows you to include premium digital inking features in your applications. Its modularized architecture allows each module to be configured, replaced, or omitted as required by the specific application, providing you with superior flexibility. You can also use the WILL file format (.will) to exchange ink content between applications and platforms.


The WILL™ data format is similar to SVG, but is specifically designed to accommodate digital ink content. It is used for exchanging ink content between devices and applications, and is implemented as an open and extensible binary format. Note that the main modules of the WILL software library do not rely on a specific file format. You can use InkML, SVG, PNG or others to exchange handwritten content, according to an application’s specific requirements.


WILL™ supports a variety of input technologies and generates the best possible ink through the use of these modules:


  • Path generation and Smoothing taking into account the specific characteristics of each input type, including the pen movement and pressure
• Rasterizer providing advanced real-time stroke rendering
• Manipulation supporting editing functions that leverage the WILL stroke mathematical model
• Serialization encoding: encodes and decodes WILL stroke data


The WILL™ SDK for ink provides platform-specific packages for iOS, Android, Windows UWP and Web. These packages provide a deep integration with the hosting platform by using native packaging and programming techniques and by providing platform-specific language bindings for all modules in the software library. Additional integration can be supported on request under a high-profile partnership contract.


WILL SDK for ink is included as part of the following WILL Editions:

Community Edition
Ink Edition
Signature Edition
• Document Edition
Enterprise Edition

WILL SDK for ink includes:

• WILL SDK - integrate digital ink in your application, parse and serialize ink data to
  the WILL file format
Documentation, including sample code


WILL SDK for devices

The WILL™ SDK for devices allows you to integrate our Wacom hardware into your applications.
The Common Device Library (CDL) SDK currently supports the Wacom Smartpads (Folio, Slate), Intuos Pro Paper Edition, and Sketchpad Pro. Depending on the device platform-specific packages are provided for iOS, Android, Windows UWP/Desktop, and Web. Further Wacom device support is provided by our Bluetooth Stylus and Low-Level Driver APIs.

The STU SDK is for signature pads, STU series and requires more coding effort than the signature SDK, but allows unrestricted access to the data which can be stored in any suitable format. Applications can upload graphical images to the pad display and record the pen movement, including timing and pressure information. It is available for C#, Delphi, HTML and Java.

WILL SDK for devices is included as part of the following WILL Editions:

• Ink Edition
• Signature Edition
• Document Edition
• Enterprise Edition

WILL SDK for devices includes:

• Common Device Library SDK - Capture pen data from Wacom Smartpad devices:
Bamboo Slate/Folio/Spark, Wacom Clipboard, and Intuos Pro: Paper Edition
• STU SDK - Capture pen data from STU-series signature pads
• DTU SDK - Capture pen data from DTU-series and Wacom tablets and pen devices
• Comprehensive documentation, including sample code


WILL SDK for documents

The WILL™ SDK for documents supports the handling of forms that contain digital ink information like handwritten text or signatures.

The SDK contains the Ink document metadata Library, which handles meta-data used in ink documents:

  •  Ink forms fields metadata:
Differentiates between text and signature ink fields
For form filling use cases
•  Mapping of unique page ids to template pages in the PDF
•  Device information of the form capturing device
•  Content ink data stored as RAW data or compressed as WILL data
•  Biometric signature data stored as FSS

In combination with the WILL™ SDK for devices, WILL™ SDK for signature, and digital ink hardware like the Wacom Clipboard; Wacom offers an end-to-end solution for form filling, document, and signature workflows.

WILL SDK for documents is included as part of the following WILL Editions:

• Document Edition
• Enterprise Edition

WILL SDK for documents includes:

• Ink document metadata Library - handling ink form metadata
Documentation, including sample code


WILL SDK for signature


The WILL™ SDK for signature allows you to integrate support for Wacom signature pads or pen displays into your applications to enhance the capture and display of signatures for applications like banking, credit cards and other identity capture uses. Even after hundreds of thousands of transactions text and images remain clearly on the screen thanks to Wacom’s SDK and signature pads.

The Signature SDK includes the tools necessary for enabling applications to capture biometric handwritten signatures with STU series, pen displays, pen tablets and mobile devices – operating with Windows, iOS or Android. The SDK requires minimal effort to integrate, and automatically renders digital ink, displays dialog boxes, and captures full biometric signature data.

The Wacom SigCaptX Library is an extension of the Windows Wacom Signature SDK. SigCaptX contains components which allow a signature enabled web application to be used in a range of browsers. It has been tested with Internet Explorer, MS Edge, Chrome, and Firefox.


WILL SDK for signature is included as part of the following WILL Editions:

• Signature Edition
• Enterprise Edition

WILL SDK for signature includes:

• Signature SDK - FSS signature capture and handling
• Documentation, including sample code
• STU & DTU SDKs are included in WILL SDK for devices


feel Pen Hardware

Perfected and improved for over 30 years, loved by artist and professionals everywhere, Wacom’s unique digital pen technology enables precise and natural input that lets users focus on what really matters: their ideas and creations.

From our unique EMR (Electro-Magnetic Resonance) technology, to best-in-class Active and Passive Electrostatic solutions: We are committed to bringing the Wacom feelTM to every class of device and market segment.

Contact Sales to get more information on how to integrate feel into your new or existing product.



Bluetooth Pen & Low Level APIs

Wacom solutions provide pen and touch implementations for all major platforms. Our iOS SDK allows for input with Bluetooth®-enabled digital pens like Bamboo Fineline and Intuos Creative Stylus similar to that of a Wacom stylus on a touch-based tablet device.


Bluetooth Digital Pen API

Bring life to your apps and give users new choices with Wacom’s iOS SDK and Bluetooth®-enabled digital pens. Simple integration offers a traditional pen to paper feel for your app and provides Wacom’s Bamboo Fineline and Intuos Creative Stylus pens with extra features for the iPad:

  • Pressure sensitivity to draw fluid strokes and lines
  • Palm rejection for a natural handwriting position without disturbing the digital notepad or canvas
  • Programmable shortcut buttons

This functionality supports Wacom Bluetooth® Smart styli. It requires Bluetooth® Smart support in order to provide pressure and button data to the API. The devices that support this functionality are the iPad with Retina Display (iPad 3) introduced in 2012, and subsequent tablets using iOS 6.1 and higher.

The SDK can be downloaded at our Developer Documentation site.

Low-Level Driver APIs

Our Driver APIs provide helpful documentation, sample code and demos to get you on your way with your digital pens and tablets.