Large images slow down web pages. Optimizing images using a WordPress Image Optimizer or Compression plugin decreases their file size, which in turn speeds up the load time of the page.
Free Image Optimizer Plugins for WordPress
Smush has been benchmarked and tested number one for speed and quality and is the award-winning, back-to-back proven crowd favorite image optimization plugin for WordPress.
- Lossless Compression – Strip unused data without affecting image quality
- Lazy Load – Defer offscreen images with the flip of a switch
- Bulk Smush – Optimize up to 50 images with one click
- Image Resizing – Set a max width and height and large images will scale down as they are being compressed
- Incorrect Size Image Detection – Quickly locate images that are slowing down your site
- Directory Smush – Optimize images even if they are not located in the media library
- Automated Optimization – Asynchronously auto-smush your attachments for super fast compression on upload
- Without Monthly Limits – Optimize all of your images up to 5MB in size free forever (no daily, monthly, or annual caps)
- Gutenberg Block Integration – View all Smush stats directly in image blocks
- Multisite Compatible – Both global and individual Multisite settings
- Process All Your Files – Smush will process PNG, JPEG and GIF files for optimum results
- Super Servers – Smush images with no slowdown using WPMU DEV’s fast, reliable Smush API
- Convert to WebP (Pro Only) – Upgrade and automatically serve images in Next-Gen WebP
The EWWW Image Optimizer will increase your page speeds by way of image optimization. Increased page speeds can result in better search engine rankings, and will also improve conversion rates (increased sales and signups). It will also save you storage space and bandwidth. While EWWW I.O. will automatically optimize new images that you upload, it can also optimize all the images that you have already uploaded, and optionally convert your images to the best file format. You can choose pixel perfect compression or high compression options that are visually lossless.
EWWW I.O. will optimize images uploaded and created by any plugin and features special integrations with many popular plugins, detailed below.
- No Speed Limits and unlimited file size.
- Smooth Handling with pixel-perfect optimization using industry-leading tools and progressive rendering.
- High Torque as we bring you the best compression/quality ratio available with our lossy options for JPG, PNG, and PDF files.
- Adaptive Steering with intelligent conversion options to get the right image format for the job (JPG, PNG, or GIF).
- Free Parking The core plugin is free and always will be. However, our paid services offer up to 80% compression and a host of other features!
- Comprehensive Coverage: no image gets left behind, optimize everything on your site, beyond just the WordPress Media Library.
- Safety First: all communications are secured with top SSL encryption.
- Roadside Assistance: top-notch support is in our DNA. While API customers get top priority, we answer every single support question with care.
- Pack a Spare: free image backups store your original images for 30 days.
A freemium easy to use, comprehensive, stable and frequently updated image compression plugin supported by the friendly team that created it.
Increase your website’s SEO ranking, number of visitors and ultimately your sales by optimizing any image or PDF document on your website.
ShortPixel is an easy to use, lightweight, install-and-forget-about-it image optimization plugin that can compress all your past images and PDF documents with a single click. New images are automatically resized/rescaled and optimized on the fly, in the background. It’s also compatible with any gallery, slider or e-commerce plugin.
reSmush.it Image Optimizer allows using free Image optimization based on reSmush.it API. reSmush.it provides image size reduction based on several advanced algorithms. The API accepts JPG, PNG and GIF files up to 5MB.
This plugin includes a bulk operation to optimize all your pictures in 2 clicks! Change your image optimization level to fit your needs!
This service is used by more than 400,000 websites on different CMS (WordPress, Drupal, Joomla, Magento, Prestashop…).
Robin image optimizer is a smart and advanced image optimizer that really stands out among other WordPress plugins. This is a WordPress free image optimizer plugin with zero limitations in terms of the number of images and optimization quality. The only thing that you may stumble across is the image weight, which shouldn’t exceed 5 MB.
Image Optimizer WordPress plugin enables you to resize, compress and optimize PNG, JPG, GIF, and PDF (paid version only) files while maintaining image quality. Lossless, Lossy and Maximum Lossy (paid version only) Compression methods are available to choose from. Lossless Compression allows you to resize images without notably impacting image quality. With the Lossy Compression method, you’ll be able to compress images with minimal loss of quality. Overall, the image compression plugin will enable you to resize the image files up to 80%, depending on the image and compression type.
The image optimizer plugin can optimize the new images you upload, but you can also optimize existing images on your website. The WordPress plugin comes with a bulk optimization option, which allows optimizing multiple images at once with a single click. The number of images you can optimize in bulk is limited in the free version of the plugin.
This is a shortlist and we probably missed a few. What did we miss and which ones are your favorites? Let us know