In December 2025, the Pdftools documentation included the following updates:

Added​

• Implemented extensive restructure and improved navigation:
  • The docs landing page now includes the Toolbox add-on as a separate documentation area.
  • Both SDKs now include landing pages with an overview of what each SDK is in a nutshell: Pdftools SDK and Toolbox add-on.
  • The Toolbox add-on now has a dedicated licensing page.
  • The Other shell tools and SDKs category now includes labels for 4-Heights, 3-Heights, and Classic, along with an improved landing page.
  • All sidebars now have better structure and clearly show nesting within the docs.
  • All sidebars now include a Docs home button that leads back to the documentation landing page.
  • At the top of each page, the breadcrumbs correctly display nesting within the docs.
• Additions in the PDF Viewer SDK documentation:
  • Added a guide Create custom plugins.
  • Version 5.11.1 release notes.
  • Version 5.12.1 release notes with updated API references.
• Added release notes for the Conversion Service version 6.7.0, and documentation related to the new Extraction workflow.
• Release notes for the Toolbox add-on version 1.11.1.
• Added code examples for the LicensingService property in Use the Licensing Gateway.
• Added procedure about how to Find 3-Heights product license.

Changed​

• PDF Toolbox SDK legacy docs have been moved to the Toolbox add-on docs as versions preceding Toolbox add-on 1.0.0. To switch versions of the docs, click the Version X.X button next to the search bar and find Legacy 4-H Toolbox version 4.4.
• All Toolbox add-on content was removed from the Pdftools SDK documentation area as it was moved to its documentation space.

Fixed​

• Fixed numerous typos, broken links, misleading tags, and other issues in the Pdftools SDK, Toolbox add-on, Conversion Service, and PDF Viewer SDK documentation.
• Fixed incorrect DLL name references (PdfToolsSdkAPI.dll to PdfTools_Toolbox.dll) in the Toolbox add-on technical notes across all versioned docs.
• Fixed incorrect API reference URLs in the Toolbox add-on technical notes, now correctly pointing to /pdfsdkxt/ endpoints with matching version numbers.
• Created hundreds of redirects to the current and versioned docs of the Pdftools SDK.

In November 2025, the Pdftools documentation included the following updates:

In October 2025, the Pdftools documentation included the following updates:

In September 2025, the Pdftools documentation included the following updates:

In August 2025, the Pdftools documentation included the following updates:

In July 2025, the Pdftools documentation included the following updates:

In June 2025, the Pdftools documentation included the following updates:

In May 2025, the Pdftools documentation included the following updates:

In April 2025, the Pdftools documentation included the following updates:

In March 2025, the Pdftools documentation included the following updates: