Visualforce Components

Visualforce Components is a Setup page that lists all custom Visualforce components in the org. Visualforce components are reusable UI building blocks that can be embedded in Visualforce pages, similar to how Lightning Web Components work in the Lightning framework. They encapsulate markup and controller logic for reuse.

A Visualforce Component is the Visualforce-era equivalent of a Lightning Web Component - a reusable UI building block with its own markup and controller logic that can be embedded in Visualforce pages. The Setup page lists all custom Visualforce components in the org, with their API versions and dependencies. For teams maintaining a Visualforce codebase, this is the inventory of reusable parts.

The reason it's worth knowing about even on orgs migrating to Lightning is that Visualforce Components often become migration units. Identifying which custom components are still in active use, which can be retired, and which should be rewritten as Lightning Web Components is the kind of catalog work that turns a vague Visualforce-migration goal into a concrete project plan. Audit the page during migration planning, treat each component as a discrete decision, and the migration becomes scopable rather than overwhelming.