Image Optimizer

Description 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 thousands of websites on different CMS (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 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 !


Installation Instructions
  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 !
How great is ?

Since we’ve optimized more than 3,000,000,000 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.


Great Intent, Sadly Not Working On My Install

i initially left a two star review. with my greater knowledge of the wordstar community i now realise this was unfair – i hadn´t queried their tech support.

ironically they seem among the best tech in terms of enthusiasm and attentive response – they get 2 extra stars for that.

now having seen their replies i would change my view to one of “this is a plug in where you have to admire the intent and enthusiasm, though far from complete. didn´t work for me, but they did give potential solutions, but solutions involving far more under the toolbox work than many of us want to get involved with.
in my humble opinion plug ins like this should consider themselves beta and invite users willing to help them get it 100% cool and running, perhaps in return for a lifetime free membership. that way their users have their expectations managed and get something for rolling with bugs, and they go to open market with an established fan base and much better product.
releasing to market too soon risks bad reviews such as my original, which can then make getting take up really difficult. sorry if i have made that even harder, so have decided to add the final star reflecting that.”
good luck

orig 2 star
I couldn’t get this working.
With around 6,000 files it reported as not being optimised I even left it running overnight, but in the morning the ‘this may take a few minutes’ clock was still turning.
2 stars for intent in offering totally free processing of images up to 6mb (which unless you are a complete idiot should be 95% of the images on your site).
Sadly didn’t work, good luck with development.

Read all 11 reviews

Contributors & Developers

“ Image Optimizer” is open source software. The following people have contributed to this plugin.




  • 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