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Free Plugin by SiteGround v7.8.2

Speed Optimizer

Boost your website performance and page speed, and increase conversions with powerful caching, frontend, media, and environment optimizations.

Speed Optimizer

The facts

Rating
4.2★ from 639
Active installs
1M+
Price
Free
Last updated
25 Aug 2026
Added
Nov 2014
Requires WP
5.5.1
Tested up to
WP 7.1
Requires PHP
7.0
Downloads
104,823,399

Our analysis

AI-assisted

Speed Optimizer is a free WordPress plugin designed to enhance website performance and user experience. It offers features such as caching, minification of HTML, CSS, and JavaScript, image compression, and lazy loading, making it suitable for users of all skill levels. The plugin aims to improve SEO rankings and Core Web Vitals, thus potentially increasing conversion rates and traffic.

Developed by SiteGround, this plugin is actively used by over 1 million website owners. It provides on-demand optimization tips and allows users to manage caching effectively, contributing to faster loading times and improved site efficiency.

Best for: This plugin suits website owners looking to improve their site's speed and performance.

What it does well

  • Free to use from the WordPress.org directory
  • Over 1 million active installs
  • Easy to use for all skill levels
  • Offers caching and frontend optimizations
  • Includes image compression and lazy loading features

Where it falls short

  • Limited information on specific performance improvements
  • Dynamic caching feature is exclusive to SiteGround servers

Verdict

Speed Optimizer provides a range of features aimed at boosting website performance, making it a practical choice for users seeking to enhance their WordPress sites.

From the developer

SiteGround's own description of Speed Optimizer, lightly tidied.

The award-winning Speed Optimizer plugin is a free WordPress performance-boosting solution to improve user experience, increase conversion rates and drive more traffic. Achieve better SEO rankings, improve Core Web Vitals and enhance your Google Page Speed Score.

Developed by the WordPress speed experts at SiteGround, our free plugin is actively used and trusted by more than 2 million website owners. It’s specially designed to be easy to use, allowing users of all skill levels to make complex speed optimizations, such as minifying HTML, CSS and JavaScript, image compression and lazy loading, in a few clicks.

Install our caching plugin now to dramatically improve your WordPress website performance on any hosting platform.

Essential Speed-boosting Features:

  • Powerful Caching for up to 20% faster website.
  • Frontend Optimizations to minify JS, HTML and CSS, reducing wait time due to the number of scripts and characters in your code
  • Media Optimizations by up to 85% image size compression without sacrificing quality
  • WordPress Environment Optimizations to optimize usage and efficiency of your WordPress site resources
  • Speed Test & tips to get on-demand optimization tips to help your site get even faster

Don’t let a slow website compromise your online success. Join the millions of satisfied website owners and see the difference with the free Speed Optimizer plugin.

Awards:

Monster Awards 2022: Best WordPress Optimization Plugin 🥈

Plugin Video

Plugin Tutorial

To gain in-depth knowledge about our plugin and its functionalities, check our Speed Optimizer Tutorial. It provides detailed information on how to optimize each aspect of your site and maximizes your website performance and cache.

Caching

The Caching page gives you full control of your website’s cache, allowing you to enhance its performance significantly. Take advantage of the powerful caching options available to boost your page speed:

Dynamic caching:

By enabling Dynamic Caching, all non-static resources of your website are intelligently cached, eliminating the need for repetitive database queries and enhancing page loading speed and TTFB (time to first byte). This default feature is available exclusively for SiteGround servers, ensuring optimal performance.

File-based caching:

Read the full description on the official page →

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