Figma Plugins are JavaScript applications that extend Figma's capabilities. You can build custom tools to automate design workflows, generate code, rename components, create color themes, export assets with custom formatting, and more. Plugins have access to Figma's document API—you can read and modify designs programmatically. Plugins run in a sandboxed environment within Figma. You build them with JavaScript/TypeScript, publish to Figma's marketplace, and users install them one-click.