Year 2026 Docotic.Pdf notices

Updated on November 2, 2026

Post about a year releases

This page contains all Docotic.Pdf release notices for 2026.

Visit the Docotic.Pdf page for more information and download links. The full Version History for 2026 releases is also available.

We would appreciate hearing about your experience with the library. Your questions and feature suggestions are welcome. Write us an e-mail or contact us via the support form. We love hearing from our users.

Docotic.Pdf 10.0 Preview

November 02, 2026

Docotic.Pdf 10.0 is under development, and the final release is not yet available. However, pre-release builds are already available for early access. Anyone can download and evaluate these builds to explore the latest features and improvements before the official release.

Version 10 introduces significant API changes, including breaking changes that may require updates to existing applications. Refer to the migration guide for detailed explanations, examples, and recommended migration strategies.

The most significant changes affect collections and object identity semantics. The new version also introduces improved APIs for working with:

  • page collections
  • PDF outlines (bookmarks)
  • layers (optional content groups)
  • choice fields (combo boxes and list boxes)
  • ink annotations
  • XMP metadata
  • page labels

We encourage you to try the pre-release builds and share your feedback. Early testing helps us identify potential issues and improve the library before the final release.

Docotic.Pdf 9.9. New PDF/A support + memory and HTML-to-PDF improvements

May 15, 2026

Docotic.Pdf 9.9 is ready. This release focuses on PDF/A standard compliance, memory consumption, and improved HTML to PDF conversion. It also introduces several breaking changes.

Ability to produce PDF/A-compliant documents

The main feature of this release is the introduction of a free Conformance add-on that enables the creation of PDF/A-compliant documents. The add-on provides the SaveAsPdfa extension methods for PdfDocument. These methods allow you to produce documents that conform to the following PDF/A levels:

  • PDF/A-1a, PDF/A-1b
  • PDF/A-2a, PDF/A-2b, PDF/A-2u
  • PDF/A-3a, PDF/A-3b, PDF/A-3u
  • PDF/A-4, PDF/A-4e, PDF/A-4f

This new add-on replaces the older PdfSaveOptions.ProducePdfA workflow and provides a more advanced and reliable way to create documents that meet PDF/A requirements and pass validation in veraPDF and Preflight tool in Acrobat Pro.

We prepared code examples showing how to produce PDF/A-compliant documents in C# and VB.NET using Docotic.Pdf and the Conformance add-on.

Reduced memory consumption

Version 9.9 includes several improvements that significantly reduce memory usage and improve performance, especially for large or complex documents:

  • Lower memory consumption when parsing OpenType fonts.
  • A more efficient merge process with fewer allocations on the Large Object Heap.
  • Reduced memory usage in PdfDocument.DocumentsAreEqual.

Updated HTML to PDF add-on

The HTML to PDF add-on has been updated to use Chrome 147.0.7727.57. The converter now also waits for custom fonts to load before generating the PDF. These changes improve the quality of the conversion.

We updated the add-on dependencies to newer versions and added a new dependency on Microsoft.IO.RecyclableMemoryStream. You will not notice the difference if you install the library and add-ons from NuGet. If you add references manually, remember to include the new dependency.

Breaking changes

Version 9.9 includes several breaking changes that may require updates in your codebase. These changes relate primarily to the transition to the new Conformance add-on and the removal of APIs previously marked as obsolete.

The old PDF/A and PDF/X conformance APIs have been retired. Use the new Conformance add-on instead. The following APIs are now obsolete and must be replaced:

  • PdfSaveOptions.ProducePdfA
  • PdfaConformance enumeration
  • PdfDocument.GetPdfaConformance
  • PdfxConformance enumeration
  • PdfDocument.GetPdfxConformance

A large set of methods, properties, and enumeration members that had been marked as obsolete in earlier versions have now been removed entirely. If your application still uses any of these APIs, migrate to the supported equivalents.

The metadata synchronization logic has changed. The PdfDocument.SyncMetadata method now removes the non-standard properties in XmpPdfSchema.



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