Yes, Optisize is free to use. It is available as a free plugin on WordPress.org.

How many websites use Optisize?

Optisize has 0 active installations as tracked by WordPress.org.

What are the best Optisize alternatives?

Popular alternatives to Optisize include EWWW Image Optimizer, Smush – Image Optimization…, Converter for Media – Optimize images |…. You can compare them side-by-side on our comparison pages.

Does Optisize work with the latest WordPress?

Optisize has been tested up to WordPress 6.9.4. It requires WordPress 5.0+ and PHP 7.4+.

PluginSift

Optisize – WebP Konwerter

Name: Optisize – WebP Konwerter
Author: Mateusz Krosnowski

Automatically compresses images on upload and converts them to the modern WebP format.

By Mateusz Krosnowski·Webp·Free

·0 active installs·Updated 1 month ago

Download Compare

As of April 2026, Optisize is a WordPress webp plugin with 0 active installations and a 0/5 rating0. It has been downloaded 171 times in total. Requires WordPress 5.0+ and PHP 7.4+. Available on WordPress.org since 2026. Recently updated within the last 3 months. Top alternative: EWWW Image Optimizer.

0/5Rating

0active installs

171total downloads

2 monthssince 2026

Overview

Optisize is a powerful yet lightweight WordPress plugin designed to automatically optimize your media library. It hooks into the upload process to ensure every image you add to your site is compressed and converted to WebP, significantly improving page load speeds and SEO performance.

Key Features:
* Automatic WebP Conversion: Automatically converts JPG, JPEG, and PNG uploads to WebP.
* Smart Compression: Maintains high visual quality while drastically reducing file sizes.
* Bulk Optimization: Process your existing media library with a built-in batch processing tool.
* Easy Toggle: Quickly enable or disable optimization directly from the Media Library.
* Content Replacement: Automatically updates post content to point to the new WebP versions of your images.

Read full description on WordPress.org