Convert All Images to WebP: Top WordPress Plugins

Images are a major part of any WordPress website, but they can also be one of the biggest reasons your site loads slowly. In a world where speed impacts everything from SEO rankings to user experience, converting images to WebP is no longer optional.

By converting all your images to WebP, you can significantly reduce file sizes and boost your site’s performance.

In this post, we will cover the best WordPress plugins to convert all images to WebP to help you make a smart decision.

6 Best WordPress Plugins to Convert all Images to WebP Comparison

Plugin	Convert Images on Upload	Bulk Optimization	Automatic Image Conversion	Bonus Features	Pricing
ThumbPress	✅	✅	✅	Thumbnail control, image compression, cleanup images	Freemium
Converter for Media	❌	✅	✅	Focused on conversion and delivery	Freemium
Imagify	❌	✅	✅	Dedicated to compression and format conversion	Freemium
ShortPixel	❌	✅	✅	Advanced compression & automation options	Freemium
EWWW Image Optimizer	❌	✅	✅	Large image handling, lazy load	Freemium
WP Smush Pro	❌	✅	✅	Lazy load, resizing, global CDN	Premium

Now that you know about the basic features of each plugin, let’s take an in-depth look at each option.

1. ThumbPress

ThumbPress is a comprehensive WordPress plugin designed to manage and enhance website performance. A standout feature is its ability to convert all images to WebP format, which helps reduce WordPress image size without compromising quality.

Beyond WebP support, ThumbPress also offers essential features like disabling unnecessary thumbnails, regenerating thumbnails, detecting and deleting unused images, detecting and deleting large images, WordPress image compression, and more.

With this plugin, you can save your time, save your money, and optimize your WordPress images efficiently.

Top Features

• Provides a feature to detect multiple unused images and an option to delete them. 

• Easily regenerate thumbnails with a drag-and-drop feature. 

• Bulk and automatically convert images to WebP format. 

• Detect and delete the large images feature to remove unnecessary burden. 

• Replace older images from the Media Library with new ones without changing their URLs.

Pricing

ThumbPress has both free and premium option. ThumbPress Premium gives you full access to all advanced WordPress image optimization features. You can choose between two pricing options: Yearly and Lifetime plans.

Here’s a breakdown of the yearly pricing:

• Single Site License – $27.99/year
• 5 Sites License – $55.99/year
• 10 Sites License – $69.99/year
• Unlimited Sites License – $124.99/year

2. Converter for Media

WebP Converter for Media is a powerful WordPress plugin designed to optimize your website’s images for faster loading times and improved SEO. It supports both WebP and AVIF formats for superior compression without compromising quality. 

The plugin operates via remote image conversion, reducing the load on your server and ensuring efficient processing. With support for CDN integration, it delivers optimized images globally. This plugin simplifies image optimization, enhancing user experience and performance.

Top Features

• Converts images to the AVIF format, offering approximately 50% smaller file sizes. 

• Utilizes remote servers for image conversion, reducing the load on your hosting. 

• Enables bulk optimization of all existing images with a single click. 

• Automatically serves images in WebP or AVIF formats based on browser compatibility. 

• Offers a single license that can be used on an unlimited number of websites.

Pricing

WebP Converter for Media Pro unlocks advanced image optimization features with support for WebP image conversion. All monthly plans include a license for unlimited websites.

Here is an overview of the monthly pricing:

• 10,000 images – $5/month
• 25,000 images – $10/month
• 70,000 images – $25/month

3. Imagify

Imagify is a user-friendly image optimization plugin designed to enhance your website’s performance. By converting images to modern formats like WebP and AVIF, Imagify significantly reduces file sizes without compromising quality. 

This leads to faster page load times, improved SEO rankings, and a better user experience. The plugin supports automatic optimization of all image sizes, bulk processing, and seamless integration with your WordPress media library. 

Top Features

• Compresses JPG, PNG, GIF, and PDF images with Smart Compression. 

• Automatically converts images to WebP format.

• Allows on-the-fly image resizing via the app or WordPress integration. 

• Utilizes Imagify’s servers for image optimization. 

• Offers secure and encrypted connections to ensure safety.

Pricing

Imagify makes image optimization easy with plans designed for all types of websites. Each monthly plan supports unlimited websites and unlimited file sizes.

Monthly Plans includes:

• Starter – Free (includes 20MB/month)
• Growth – $5.99/month for 500MB
• Infinite – $11.99/month for unlimited image optimization

4. ShortPixel Image Optimizer

If you’re looking to speed up your website without sacrificing image quality, ShortPixel is a tool worth checking out. It automatically compresses and converts your images, including to the ultra-efficient WebP format. It helps your pages load faster and rank better in search engines. 

ShortPixel works behind the scenes to optimize your entire media library. With features like bulk optimization, smart compression options, and easy WordPress integration, it’s a simple but powerful way to enhance performance and user experience.

Top Features

• Compresses images (JPG, PNG, GIF, PDF) using lossy, glossy, or lossless modes.

• Allows bulk optimization of all media files and supports WP-CLI.

• Offers advanced exclusion rules and automatic image resizing.

• Seamlessly integrates with popular plugins and supports multisite.

Pricing

ShortPixel makes image optimization simple and scalable with plans built for websites of all sizes. Each plan supports unlimited websites and includes advanced features like WebP conversion and bulk optimization.

Their both plans include:

• $9.99/month for unlimited image optimization
• $99.90/year for unlimited image optimization

5. EWWW Image Optimizer

EWWW Image Optimizer is a powerful solution for WordPress users who are looking to optimize large images without compromising quality. This service supports the conversion of images to the WebP format and ensures faster loading times and improved SEO performance. 

With the ability to handle images up to 150MB and dimensions up to 16,383 x 16,383 pixels, it’s ideal for photographers, designers, and anyone dealing with high-resolution media. The plugin also offers a 5-minute processing time limit per image, accommodating even the most substantial files efficiently.

Top Features

• Compresses images using both lossless and lossy methods.

• Automatically optimizes new uploads and allows bulk optimization of existing media files.

• Enables lazy loading to improve page speed.

• Optimizes images in any folder across your WordPress site.

Pricing

EWWW Image Optimizer offers flexible monthly plans tailored to various website needs, all supporting unlimited websites and large image volumes.

Monthly Pricing plans overview:

• Standard – $8/month
• Growth – $16/month
• Infinite – $32/month

6. WP Smush Pro

WP Smush Pro is a feature-rich image optimization plugin designed to make your WordPress site faster and more efficient. It includes automatic WebP conversion, helping you shrink image file sizes without losing clarity. 

This means quicker load times, better Core Web Vitals, and stronger SEO performance. Except for WebP support, Smush Pro also handles bulk image compression, lazy loading, and CDN integration, so its easier to optimize every image across your site. 

Top Features

• Lossless and multi-pass lossy compression for high-quality image optimization.

• Built-in lazy loading to defer offscreen image loading and improve page speed.

• Bulk and background optimization to compress multiple images efficiently.

• Automatic image resizing with max dimension settings plus global CDN.

Pricing

WP Smush Pro is a premium image optimization plugin by WPMU DEV. It offers multiple pricing plans for its users. All plans support unlimited websites.

It’s Monthly Pricing:

• Basic – $1.50/month
• Standard – $2.50/month
• Freelancer – $5/month
• Agency Unlimited Sites – $10/month

How to Choose a WebP Plugin for WordPress

With so many image optimization plugins out there, it can be hard to know which one is right for your website to convert all images to WebP.

Here are the most important features to consider when you are choosing a WebP plugin for your website.

Ease of Use

A good plugin should be beginner-friendly. Look for one with a simple setup process, a clean dashboard, and clear instructions. 

Many WordPress plugins offer a one-click WebP image conversion, where image conversion runs automatically in the background. Also, check if the plugin integrates well with your theme and other tools on your site.

Automatic Conversion

Manual image conversion is time-consuming. Choose a plugin that automatically converts your images to WebP as you upload them to the media library. Some tools also allow you to convert existing images in bulk, which is a huge time saver for sites with a large media library.

Look for features like Single image conversion, convert image on upload, and automatic image conversion.

Bulk optimization

If you already have hundreds (or thousands) of images on your site, bulk optimization is essential. This feature lets you convert all your current images to WebP with just a few clicks.

You have to make sure the plugin offers a progress bar or logs so you can monitor which images have been converted.

Compatibility with CDN

A content delivery network (CDN) helps load images faster by serving them from servers closer to your visitors. Some WebP plugins integrate directly with popular CDNs like Cloudflare, Jetpack, and others.

Remember, without proper integration, your WebP images might not display correctly or may be served in the wrong format to unsupported browsers.

Pricing (freemium vs premium)

Most WebP plugins offer a free version with basic features. However, advanced tools like schedule optimization, WebP+AVIF support, or higher image quotas are usually locked behind a paid plan.

When you decide to purchase, compare what’s included in free vs. premium, look for lifetime deals or bundle offers, and check if pricing is based on image count, bandwidth, or site traffic.

Final Words

Convert all images to WebP is one of the most effective ways to speed up your WordPress site, improve SEO performance, and deliver a better user experience. With a variety of powerful plugins available, you don’t have to be a developer to make the switch.

If you need advanced features like bulk optimization, WebP support, or CDN integration, or you’re just looking for a simple, reliable tool, there’s a plugin that fits your needs and budget.

Take the time to evaluate your site’s requirements, compare plugin capabilities, and choose a solution that helps you get the most out of your media library.

Frequently Asked Questions (FAQs)

Q. Do WebP images affect SEO?

Yes, in a good way. WebP images are smaller in size, which means faster page load times. Since site speed is a ranking factor, using WebP can help improve your SEO.

Just make sure your images are still high-quality and properly optimized with alt text.

Q. Can I revert WebP images to the original format?

In most cases, yes. Many WebP plugins keep a backup of the original image, so you can switch back if needed. It’s a good idea to choose a plugin that offers this feature, especially if you’re concerned about compatibility or image quality.

Q. Are WebP images supported on all browsers?

Almost all modern browsers, including Chrome, Firefox, Edge, and Safari, support WebP. However, a small number of older browsers do not.

Q. Do I need a CDN for WebP images?

A CDN isn’t required, but it can help. A CDN (Content Delivery Network) makes sure your WebP images load quickly from servers closer to your visitors. Some plugins even offer built-in CDN support, which makes setup easier and improves performance globally.