: Navigate to Plugins > Add New > Upload Plugin in your WordPress admin.

: Click Install Now , then select Activate once the upload is complete.

: Click Choose File and select the .zip you downloaded.

: The official marketplace for premium extensions. Many offer a .zip download directly from your account dashboard after purchase or free "checkout".

You can download several reputable "Product Builder" or "Configurator" plugins as .zip files from official repositories:

: Some specialized builders, like Product Add-Ons Ultimate , require downloading the .zip directly from their site after purchase. Manual Installation Guide

: The safest source for free versions. Popular options include Product Builder for WooCommerce (Custom PC style) and Custom Product Builder .