Do you need a WordPress plugin to convert all the JPG and PNG images to webP on your site? I made one. Use it.

It’s a bare-bones plugin that’s best utilized with WP-CLI to convert all PNG and JPG images on your WordPress site. I made it out of necessity as I was migrating a 15 year old WordPress install and the image library was around 3GB and the migration plugin for the new host capped migrations at 2GB.

Per the README.md:

A lightweight, zero-bloat WordPress plugin and WP-CLI utility designed to convert massive media libraries from legacy JPEG and PNG formats to modern WebP while safely synchronizing database references, metadata, and reclaiming disk space.

Here’s the plugin. Caveat emptor.

Published on October 15, 2026