NashTech Insights

Umbraco 11 Breaking Changes: A Comprehensive Overview

Hung Nguyen
Hung Nguyen
Table of Contents
Umbraco 11


Umbraco 11, the latest version of the popular content management system (CMS) in .NET, brings a range of exciting updates, enhancements, and new features. However, along with these advancements, there are certain breaking changes that developers and site administrators should be aware of. In this blog post, we will delve into the key breaking changes introduced in Umbraco 11 and explore how they might impact your projects.

Breaking Changes in Umbraco 11

In Umbraco 11, several breaking changes have been implemented. Let’s explore some of the key breaking changes:

Improved Performance and Technology Stack

Umbraco 11 runs on the latest version of the Microsoft .NET technology as well as the latest version of C#. This upgrade ensures that you get all the latest performance benefits and can take full advantage of the functionality that ships with these versions.

Enhanced Block Grid Editor

The Block Grid Editor in Umbraco 11 introduces a new approach to layout and content structure. As the name suggests, everything is now based on Blocks (Element Types), allowing developers to craft tailored editing experiences and content structures using known conventions. If you are familiar with the Block List Editor or Nested, you will feel right at home.

Using Blocks and Element Types, you can configure content and settings in a much easier way compared to the old Grid Layout editor. Property Editors can be used to create Blocks, providing you with a wide range of options and tools out-of-the-box to tailor the editing experience.

Updated Rich Text Editor (TinyMCE)

TinyMCE, the JavaScript framework powering the Rich Text Editor in the Umbraco CMS back office, has been updated and improved in Umbraco 11. It serves as a finely tuned engine capable of wrapping HTML and displaying it in a user-friendly manner for content editors. The updated TinyMCE offers enhanced features and a smoother editing experience, making it even more efficient for content creators.

Improved Image Manipulation with ImageSharp

In Umbraco 11, the dependency on ImageSharp for image manipulation has undergone a significant change. It has been modularized into a package that is now shipped with Umbraco. This separation enables independent upgrades to future major versions of ImageSharp within Umbraco 11+, providing more flexibility and easier maintenance.


Umbraco 11 introduces several breaking changes that developers and site administrators need to be aware of when upgrading to this version. Understanding these changes and their impact on your projects is crucial for a seamless transition and to fully leverage the new features and enhancements offered by Umbraco 11.

Hung Nguyen

Hung Nguyen

Hung, who serves as an Engineering Manager at NashTech, possesses an extensive background in software development spanning more than 20 years, primarily focused on .NET development. His journey with .NET began in 2002 with the advent of .NET Framework 1.0. Presently, his areas of keen interest encompass .NET, Microservices, CMS, and eCommerce.

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