Last updated: June 25, 2014 (1 month ago)
Compatibility (latest version): 100% (of votes)
Tested up to (WP version): WP 3.9.1
Download count: 362,731
Rating: 5 (out of 5)
The EWWW Image Optimizer is a WordPress plugin that will automatically and losslessly optimize your images as you upload them to your blog. It can also optimize the images that you have already uploaded in the past. It is also possible to convert your images automatically to the file format that will produce the smallest image size (make sure you read the WARNINGS). It can also optionally apply lossy reductions for PNG images.
By default, EWWW Image Optimizer uses lossless optimization techniques, so your image quality will be exactly the same before and after the optimization. The only thing that will change is your file size. The one small exception to this is GIF animations. While the optimization is technically lossless, you will not be able to properly edit the animation again without performing an --unoptimize operation with gifsicle. The gif2png and jpg2png conversions are also lossless but the png2jpg process is not lossless. Lossy optimization is available for PNG files. While pngquant tries very hard to maintain visual quality, lossy compression always has the potential for quality loss.
Images are optimized using the jpegtran, optipng, pngout, pngquant, and gifsicle image tools (available for free). For PNG files, optipng or pngout can be used for lossless compression, and pngquant is available for lossy compression. If you want the best optimization, install all three, set optipng to level 3 (beyond that is just crazy and rarely yields significant gains) and pngout to level 0. Images are converted using the above tools and GD or 'convert' (ImageMagick).
EWWW Image Optimizer calls optimization utilities directly which is well suited to shared hosting situations where these utilities may already be installed. Pre-compiled binaries/executables are provided for optipng, gifsicle, and jpegtran. Pngout can be installed with one-click from the settings page. If none of that works, there is a cloud option that will work for those who cannot run the optimizers on their own server.
Why use EWWW Image Optimizer?
- Your pages will load faster. Smaller image sizes means faster page loads. This will make your visitors happy, and can increase ad revenue.
- Faster backups. Smaller image sizes also means faster backups.
- Less bandwidth usage. Optimizing your images can save you hundreds of KB per image, which means significantly less bandwidth usage.
- Super fast. The plugin can run on your own server, so you don’t have to wait for a third party service to receive, process, and return your images. You can optimize hundreds of images in just a few minutes. PNG files take the longest, but you can adjust the settings for your situation.
- Better PNG optimization. You can use pngout, optipng, and pngquant in conjunction.
- Root access not needed Pre-compiled binaries are made available to install directly within the Wordpress folder, and cloud optimization is provided for those who cannot run the binaries locally.
- Optimize almost anything Using the Optimize More tool, and the wp_image_editor class extension, any image in Wordpress can be optimized.
If you need a version of this plugin for cloud use only, see EWWW Image Optimizer Cloud. It is much more compact as it does not contain any binaries or any mention of the exec() function.
There are two functions on the Bulk Optimize page. One is to optimize all images in the Media Library. The Scan and Optimize is for everything else. Officially supported galleries (GRAND FlaGallery and NextGEN) have their own Bulk Optimize pages.
Skips Previously Optimized Images
All optimized images are stored in the database so that the plugin does not attempt to re-optimize them unless they are modified. On the Bulk Optimize page you can view a list of already optimized images. You may additionally choose to empty the table, remove individual images from the list, or use the Force optimize option to override the default behavior. Before running the Bulk Optimize the first time, you must run an import operation that scans your Media Library for any previously optimized images (from before version 1.8.0). The re-optimize links on the Media Library page also force the plugin to ignore the previous optimization status of images.
WP Image Editor
All images created by the new WP_Image_Editor class in WP 3.5 will be automatically optimized. Current implementations are GD, Imagick, and Gmagick. Images optimized via this class include Meta Slider, BuddyPress Activity Plus (thumbs), WP Retina 2x, Imsanity, Simple Image Sizes and probably countless others. If you have a plugin that uses WP_Image_Editor and would like EWWW IO to be able to optimize previous uploads, post a thread in the support forums.
Optimize Everything Else
As of version 1.7.0, site admins can specify any folder within their wordpress folder to be optimized. The 'Scan and Optimize' option under Media->Bulk Optimize will optimize theme images, BuddyPress avatars, BuddyPress Activity Plus images, Meta Slider slides, WP Symposium images, GD bbPress attachments, Grand Media Galleries, and any user-specified folders. Additionally, this tool can run on an hourly basis via wp_cron to keep newly uploaded images optimized. Scheduled optimization does NOT include Media Library images, because they are already optimized on upload.
Features optimization on upload capability, re-optimization, and bulk optimizing. The NextGEN Bulk Optimize function is located near the bottom of the NextGEN menu, and will optimize all images in all galleries. It is also possible to optimize groups of images in a gallery, or multiple galleries at once.
NOTE: Does not optimize thumbnails on initial upload for legacy (1.9.x) versions of NextGEN, but instead provides a button to optimize thumbnails after uploading images. No further updates will be provided for NextGEN legacy support, use NextCellent instead.
Features all the same capability as NextGEN, and is the continuation of legacy (1.9.x) NextGEN support.
GRAND Flash Album Gallery
Features optimization on upload capability, re-optimization, and bulk optimizing. The Bulk Optimize function is located near the bottom of the FlAGallery menu, and will optimize all images in all galleries. It is also possible to optimize groups of images in a gallery, or multiple galleries at once.
Uploads are automatically optimized. Look for Optimize under the Image Store (Galleries) menu to see status of optimization and for re-optimization and bulk-optimization options. Using the Bulk Optimization tool under Media Library automatically includes all Image Store uploads.
Romanian translation by MediasInfo.ro.
Spanish translation by Andrew Kurtis of WebHostingHub, looking for new maintainer.
Dutch translation by Ludo Rubben.
- Please post in the support forums announcing your intent to translate the plugin into a particular language.
- Download ewww-image-optimizer.pot from the plugin /languages/ folder.
- Fill in the msgstr for each msgid and complete the header information as best as you can (recommended to use PoEdit).
- Save it as a .po file.
- Submit it via the form at http://www.shanebishop.net/contact-me/
Plugin settings page.
Additional optimize column added to media listing. You can see your savings, manually optimize individual images, and restore originals (converted only).
Bulk optimization page. You can optimize all your images at once and resume a previous bulk optimization. This is very useful for existing blogs that have lots of images.
Contact and Credits
Written by Shane Bishop. Based upon CW Image Optimizer, which was written by Jacob Allred at Corban Works, LLC. CW Image Optimizer was based on WP Smush.it.
Hammer designed by John Caserta from The Noun Project.
Images designed by Simon Henrotte from The Noun Project.
In general, these lists only apply to shared hosting services. If the providers below have VPS or dedicated server options, those will likely work just fine. If you have any contributions or corrections to these lists, please contact me via the form at http://www.shanebishop.net
Webhosts where things work out of the box.
Webhosts where the plugin will only work in cloud mode or only some tools are installed locally.
Latest Change log entry:
- added: fallback mode when totals for resizes and unoptimized images cannot be determined by the bulk optimize tool
- added: up to 30 second retry when import is interrupted on bulk optimize page
- fixed: suppress 'empty server response' messages for cloud users, instead correctly report No Savings
Attachment, attachments, buddypress, Compression, flagallery, flash gallery, gifsicle, gmagick, gmedia, image, image editor, image-store, images, imstore, jpegtran, lossless, lossy, meta-slider, metaslider, nextgen, Optimization, optimize, optipng, photo, photos, picture, pictures, pngout, pngquant, seo, slider, wp-symposium
This plugin works it’s optimization magic on image sizes greater than 1Mb (Smush it plugin can’t). To resize width and height, I recommend