ShortPixel Image Optimizer
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.
Short Pixel uses minimal resources and works well with any shared, cloud, VPS or dedicated web hosting. It can optimize any image you have on your website even the images that aren’t listed in Media Library like those in galleries like NextGEN, Modula or added directly via FTP!
Both lossy and lossless image compression is available for the most common image types (JPG, PNG, GIF and WebP) plus PDF files.
We also offer glossy JPEG compression which is a very high quality lossy optimization algorithm. Specially designed for photographers!
Optimized images mean better user experience, better PageSpeed Insights or GTmetrix results, better Google PageRank and more visitors.
Why is ShortPixel the best choice when it comes to image optimization or PDF compression?
popular plugin with over 100,000 active installations according to WordPress
compress JPG, PNG, GIF (still or animated) images and also PDF documents
option to automatically convert PNG to JPG if that will result in smaller images. Ideal for large images in PNG format.
no file size limit
option to freely convert any JPEG, PNG or GIF (even animated ones!) to WebP for more Google love. How to enable WebP?
option to include the generated WebP images into the front-end pages by using the <picture> tag instead of <img>
compatible with WP Retina 2x – all retina images are automatically compressed. How to benefit from Retina displays?
optimize thumbnails as well as featured images. You can also select individual thumbnails to exclude from optimization.
ability to optimize any image on your site including images in NextGEN Gallery and any other image galleries or sliders
integrates with Gravity Forms post_image field type optimizing the images upon upload
featured images can be automatically resized before being optimized with 2 different options. No need for additional plugins like Imsanity
CMYK to RGB conversion
24h stellar support (24/7) directly from developers.
easily test lossy/lossless versions of the images with a single click in your Media Library
great for photographers: keep or remove EXIF data from your images, compress images with lossless option
works well with both HTTPS and HTTP websites
uses progressive JPEG for larger images in order to speed up the image display
you can run ShortPixel plugin on multiple websites or on a multisite with a single API Key
it is safe to test and use the plugin: all the original images can be restored with a click, either one by one or in bulk
‘Bulk’ optimize all the existing images in Media Library or in any gallery with one click
works great for eCommerce websites using WooCommerce or other plugins
works great with NextGEN gallery, Foo Gallery and any other galleries and sliders
compatible with WP Engine hosted websites and all the major hosting providers
compatible with WPML and WPML Media plugins
skip already optimized images
compatible with watermarking plugins
option to deactivate auto-optimizing images on upload
images that are optimized less that 5% are bonus
WooCommerce, WP offload S3 and WP Stateless compatible
40 days optimization report with all image details and overall statistics
We are GDPR compliant! Read more.
free optimization credits for non-profits, contact us for details
How much does it cost?
ShortPixel comes with 100 free credits/month and additional credits can be bought for as little as $4.99 for 5,000 image credits.
Check out our prices.
★★★★★ A Super Plugin works very well 62% reduction overall. robertvarns
★★★★★ The secret sauce for a WordPress website. mark1mark
★★★★★ A must have plugin, great support! ElColo13
★★★★★ Excellent Plugin! Even Better Customer Service! scaliendo
★★★★★ Great image compression, solid plugin, equally great support. matters1959
Help us spread the word by recommending ShortPixel to your friends and collect 100 lifetime monthly additional image credits for each referred active user. Make money by promoting a great plugin with our 50/50 affiliate program.
Get in touch!
Actions and Filters for Developers
The ShortPixel Image Optimiser plugin calls the following actions and filters:
do_action( ‘shortpixel_image_optimised’, $post_id ); //upon successful optimization
do_action(“shortpixel_before_restore_image”, $post_id); //before restoring an image from backup
do_action(“shortpixel_after_restore_image”, $post_id); //after succesful restore
apply_filters(“shortpixel_backup_folder”, $backup_folder); //just before returning the ShortPixel backup folder, usually …wp-content/uploads/ShortpixelBackups
Let’s get ShortPixel plugin running on your WordPress website:
Sign up using your email at https://shortpixel.com/wp-apikey
You will receive your personal API key in a confirmation email, to the address you provided.
Upload the ShortPixel plugin to the /wp-content/plugins/ directory
Use your unique API key to activate ShortPixel plugin in the ‘Plugins’ menu in WordPress.
Uploaded images can be automatically optimized in the Media Library.
How does ShortPixel compare to other image optimisation plugins (e.g Smush, Imagify, TinyPNG, Kraken, EWWW)?
ShortPixel has better compression rates, more features, supports backups and has very affordable one-time plans.
If you are serious about making an informed decision please take 10 minutes and read this article.
Can I use the same API Key on multiple web sites?
Yes, you can.
As long as you have available credits you can use a single API Key on as many websites as you wish!
Can I test/use the plugin for free?
Yes you can.
We offer 100 free image optimization credits each month. Exceeding the monthly free quota will pause the optimization process till the quota is reset or extended by buying one of our plans.
Can I optimize images that aren’t in Media Library?
You can actually optimize any image you have on your site regardless of its place. You just need to add – in the Advanced section of the ShortPixel Settings – the folders where the images you want to optimize are located and ShortPixel will work its magic and do the rest.
Can I optimize both past and new images?
You can optimize all your past/current images using our “Bulk ShortPixel” page in your Media with a single click.
A credit = an optimized image?
Yes, that is correct.
But please note that usually an image in Media Library has 3, 5 or more associated thumbs. Each optimized thumb requires a credit. In the rare cases when ShortPixel does not optimize the image (lossy) with at least 5%, the credit will not be consumed, though.
Can I restore my images? What happens with the originals?
If you choose the “Image backup” option in Settings/ShortPixel then the original version of any optimized image or PDF will be saved in the backup folder.
The original image is needed if you want to restore an image or if you want to convert an image from lossy/glossy to lossless or viceversa.
What types of formats can be optimized?
ShortPixel optimizes JPEG, PNG, GIF and PDF type of files.
Do you have one-time plans?
Yes we do.
The credits that come with our one-time plans never expire. Yummy! 🙂
What happens to my existing images?
Your existing images are replaced with the optimized ones.
If you choose the backup option then the originals will be saved in a separate folder so you can restore them should you ever need/want to do that.
How does the plugin work?
Our light-weight plugin sends the original images to our Image Optimization Cloud where they are compressed. ShortPixel then downloads the optimized images and the unoptimized originals are replaced with the optimized versions.
Do you optimize the images in cloud?
Yes, all the images processsed by ShortPixel are optimized in the Cloud. This takes the load off of your server and allows us to produce the best results.
What payment methods are accepted?
We accept payments via PayPal and card.
How do I activate the API key on a multisite?
You have to activate the plugin in the network admin and then activate it manually on each individual site in the multisite. Once you have done that, the Settings menu appears and you can add the API key for each individual site.
As an alternative, you can edit wp-config.php and add this line
where ‘APIKEY’ is the API Key received upon sign up.
If configured that way, the API key will be used for all the sites of the multisite but will only be visible on the main site’s Settings page, being hidden for the rest of the sites.
I am not the only one working in the WordPress Dashboard. How can I hide my API key?
There is a simple way to hide the API key, all you need to do is to add these two lines in your wp-config.php:
How much is a credit?
A credit is used each time ShortPixel optimizes an image or thumbnail by at least 5%. If we’re not able to optimize an image or thumbnail by at least 5% then no credit will be used 🙂
Please also note that usually images in your Media Library have 3-5 thumbs associated and a credit will be used for each featured image or associated thumbnail that is optimized.
Why shall I use a wordpress plugin and not an offline tool?
Because ShortPixel algorithms were perfected while optimizing over a hundred million real-life images.
ShortPixel not only offers the best compression for JPEG, PNG, GIF and PDF files but it also saves you a lot of time. You just install it on your site and then ShortPixel will take care that all the images on your site are immediately optimized after upload.
Does optimizing images affect my ALT tags?
No, ShortPixel only optimizes images, it won’t touch anything else like your HTML/CSS.
If I stop using ShortPixel will my images remain optimized?
Once optimized the images will remain optimized unless you explicitly choose to restore them. But why would you do that? 🙂
Do I have to pay monthly or one time?
We have both options available.
One-time credits never expire are a bit more expensive. Check out our prices here
When can I cancel a monthly plan?
Whenever you want.
The credits you still have available for the current billing period will still be available until the end of the billing period. At the end of it, you won’t be billed again and the plan will be reset to the free plan.
When credits expire?
Monthly credits expire after 30 days while one-time credits never expire.
Do you have an API?
Yes, we have several APIs and tools.
You can learn more about it here:
Can I use ShortPixel WP plugin on a localhost installation?
How does resizing work?
If you choose the option to resize your images then the featured image can be resized to a predefined size while keeping its aspect and proportions intact. The associated thumbs won’t be resized
Using this option you can safely upload original images safely without needing to apply any pre-processing to make them smaller.
Will ShortPixel work if my website is using CloudFare?
Absolutely! Sometimes you’ll need to make sure you whitelist some IPs, just contact us and we’ll assist you with that.
I’m stuck. What do I do?
The ShortPixel team is here to help. Contact us!