What is active_canvas?

ActiveCanvas is a plugin for Ruby on Rails applications that adds a full content management system, including a visual page editor, AI-assisted content generation, and media management. The problem it solves is that building a CMS into a web application from scratch is time-consuming, but existing CMS platforms often require you to leave your existing application and manage a separate system. Once installed, it adds an admin interface at a path like /canvas/admin where you can build pages using a drag-and-drop editor without writing code. You can arrange blocks of text, images, columns, and forms visually, then publish the page directly within your existing site. The AI integration lets you generate written content, create images from text descriptions, or even paste in a screenshot and have it produce matching HTML and CSS. All pages support SEO settings like meta tags and structured data, and every change to a page is stored as a version you can review or roll back. You would use this if you already have a Ruby on Rails web application and want to let non-technical users create and edit pages without developer involvement. It installs as a Ruby gem with a generator that sets up the database tables and configuration. It requires Ruby 3.1 or later and Rails 8.0 or later. AI features are optional and require API keys for AI providers, which can be configured via environment variables or the admin settings panel.