Image Optimizer

Περιγραφή Image Optimizer allow to use free Image optimization based on API. provides image size reduction based on several advanced algorithms. The API accept 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 300,000 websites on different CMS (WordPress, Drupal, Joomla, Magento, Prestashop…).

The plugin includes an option to exclude some pictures of the optimizer.

Since Aug. 2016, allows to optimize pictures up to 5MB, for free !

This plugin has initially been developped by Maecia Agency, Paris.


  • The simple interface


  1. Upload resmushit-image-optimizer to the /wp-content/plugins/ directory.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress.
  3. All your new pictures will be automatically optimized !

Συχνές Ερωτήσεις

How great is ?

Since we’ve optimized more than 4,000,000,000 pictures, we’ve risen new skills. Our service is still in development to bring you new crazy functionalities.

Is there an «Optimize on upload» feature ?

Absolutely, this feature is enabled for all new pictures to be added, and can be disabled on will.

Can I choose an optimisation level ?

Yes, by default the optimization level is set at 92. But you can optimize more your pictures by reducing this optimization level.

Can I go back to my original pictures ?

Yes, by excluding/reverting this asset you’ll have your original image available.

Is it possible to exclude some pictures from the optimizer ?

Yes, since version 0.12, you can easily exclude an asset from the optimizer.

Have I a risk to lose my existing pictures ?

Nope ! Image Optimizer creates a copy of the original pictures, and will perform optimizations only on copies.

Is it free ?

Yes ! Absolutely free, the only restriction is to send images below 5MB.


14 Σεπτεμβρίου 2019
I updated my PHP to the latest version yesterday on 2 of my sites which i have this plugin and i have a problem. When the plugin is activate i get error HTTP when i upload an image in libary. When is inactive everything is ok so the problem is the plugin beacause i tested to both sites. Are you going to have any update to fix it because i was happy about your plugin until now.
7 Σεπτεμβρίου 2019
This is a decent plugin I like that it compress images upto 5mb. Big negative for me I set compress level at 88% it is really doing compress at 52$ to 60% WTF It should have dropped the quality if images like 12% to 18% at most. I had like a 400k image and now is like 150k. Really should have been like 325k to 365k after it was compressed. Most of the images on my site look like crap now.
22 Αυγούστου 2019
Hello, I test it and i liked the results, BUT. I see the last update was 7 months ago. (Warning: This plugin has not been tested with your current version of WordPress.) Is still supported? Thank you.
4 Αυγούστου 2019
I love the plugin but it took massive space from my disk because it keep original images in upload foler. I feel like I just want to delete it all because my host space is gonna get full.
2 Αυγούστου 2019
Thanks for the WONDERFUL PLUGIN, been using Imagify, ShortPixel, EWWW, Optimole. And noticed the service is still the best! The quality & most importantly you guys are OFFERING IT FOR FREE! That made me (us) speechless. If your rates could be as COMPETITIVE as Imagify / Shortpixel for your paid version. You guys will definitely be the BIG 4 image optimizer tool for WordPress users, the SEO geeks. Cheers! And continue to innovate & improve on the service! -Chris Chong from YUPMS
Ανάγνωση όλων των 81 κριτικών

Συνεισφέροντες & Προγραμματιστές

“ Image Optimizer” είναι λογισμικό ανοιχτού κώδικα. Οι παρακάτω έχουν συνεισφέρει στη δημιουργία του.


Σύνοψη αλλαγών


  • Fix on attachment metadata incorrectly returned (will fix issues with other media libraries)


  • WordPress 5.0 compatibility


  • Fix PHP errors with PHP 7.2
  • Code refacto


  • Fix JS on «Optimize» button for a single picture
  • Provide a new «Force Optimization» for a single picture


  • Avoid filesize () : stat failed errors if a picture file is missing
  • Log check file permissions
  • Check extensions on upload (avoid using API if it’s not a picture)
  • Increase API Timeout for big pictures (10 secs)


  • Fix bug (non-working optimization) on bulk upload when «Optimize on upload» isn’t selected
  • New header banner for 4 billionth images optimized


  • Add correction for allow_url_fopen support
  • News feed loaded from a SSL URL


  • Log rotate if file too big


  • Tested up to WordPress 4.9.5
  • New contributor (resmushit)
  • Translation completion


  • Tested up to WordPress 4.9.1
  • New header banner for 3 billionth images optimized 🙂


  • Tested up to WordPress 4.8.1


  • New header banner for 2 billionth images optimized 🙂


  • Slovak translation fix


  • Slovak translation fix


  • Italian translation added (thanks to Cristian R.)
  • Description minor correction


  • Slovak translation added (thanks to Martin S.)


  • Bug fix when images uploaded > 5MB
  • List of files above 5MB
  • Translation minor corrections


  • Error management if webservice not reachable
  • Filesize limitation increased from 2MB to 5MB


  • CSS Fixes


  • Translation correction
  • News feed images correction


  • Delete also original file when deleting an attachment
  • Exclusion of an attachment of the optimization (checkboxes)
  • Adding french translation
  • Code optimizations
  • 4.6.x check
  • Minor bugs corrections


  • Optimize on upload
  • Statistics
  • Log services
  • Interface rebuild
  • News feed from


  • plugin base
  • bulk optimizer