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Umbraco CMS

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Umbraco is a free open-source .NET CMS offering a user-friendly backoffice and a flexible architecture for developers.

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Free .NET CMS with a friendly backoffice and powerful extensibility.

Core Features

  • ASP.NET Core based, high performance & cross-platform
  • Intuitive backoffice with drag-and-drop content editing
  • Multi-site, multi-language, multi-tenant support
  • Extensive extensibility with packages & custom data types
  • Built-in membership, forms, and media management

What It Can't Do

  • Do not run from GitHub source code directly; production requires HTTPS, database, and performance tuning; use Azure or SQL Server compatible DB; initial run requires internet for packages.

Use Cases

  • Corporate websites and portals
  • Marketing and content-driven sites
  • Multi-language international websites
  • Internal intranets or knowledge bases

Detailed Introduction

Umbraco is a free, open-source .NET content management system (CMS) used by thousands of websites worldwide. It provides a user-friendly backoffice interface for content editors, with a flexible and extensible architecture for developers. Built on ASP.NET Core, Umbraco offers high performance, security, and scalability. Its community-driven development ensures continuous improvement, and it integrates seamlessly with Microsoft technologies like Azure, SQL Server, and Visual Studio. Whether you're building a simple blog, a corporate website, or a complex multi-site solution, Umbraco empowers you to deliver delightful digital experiences quickly and efficiently.

Troubleshooting & FAQ (1)

Troubleshooting
Why does 'dotnet watch' break with 'RazorSourceGenerator' error when editing cshtml files in Umbraco 17.3.5?

This is a known issue in Umbraco 17.3.5 (tracked in issue #22773). Temporary workaround: add the following to your .csproj file:

<ItemGroup>
  <AdditionalFiles Remove="**\\*.cshtml" />
</ItemGroup>

This prevents duplicate hint names generated by RazorSourceGenerator. The issue is fixed in Umbraco 17.5 and 18.0+ (upgrade when available).

GitHub Issue #22773

Tags

cmsdotnetcontent-managementopen-sourceasp.net-core

Getting Started

1

Download installer

Click the button above to download the installer for your system

2

Install the software

Double-click the downloaded installer and follow the prompts

3

Step 1: Install .NET SDK (8.0+ recommended)

4

Step 2: Run `dotnet new install Umbraco.Templates`

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Step 3: Run `dotnet new umbraco --name MySite`

Install Guide
  1. Step 1: Install .NET SDK (8.0+ recommended)
  2. Step 2: Run `dotnet new install Umbraco.Templates`
  3. Step 3: Run `dotnet new umbraco --name MySite`
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Environment Guide

Uninstall Info

To uninstall: delete the project folder. To remove the template globally: `dotnet new uninstall Umbraco.Templates`. Drop the database manually if needed.

No Extra Dependencies

Ready to use after download. No additional runtime required.

Project Info
LicenseMIT
Last Updated2026-06-25 15:25:14
GitHub RepositoryOfficial Website

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