Image Optimizer is an easy-to-use WordPress plugin that reduces image size through various compression and resizing techniques – all of which preserve …
- Installs
- 1+ million
- Rating
- 1.7 (81)
- Updated
- 39 days ago
reSmush.it : The original free image compressor and optimizer plugin
reSmush.it is the FREE image compressor and optimizer plugin - use it to optimize your images and improve the SEO and performance of your website.
- Active installs
- 100,000+
- #363 of 1,000
- Downloads, all time
- 3.6M
- 3,610,951
- Downloads, 30 days
- 13.9K
- 3.8K in the last 7
- Rating
- 4.3 / 5
- 166 reviews
- Last updated
- 2 months ago
- Aug 20, 2026
- Version
- 1.0.6
- 65 releases
Upkeep and compatibility
| Last updated | August 20, 2026Updated in the last 3 months |
|---|---|
| Tested up to | WordPress 7.1.4Covers WordPress 7.1.4, the current release |
| Needs WordPress | 4.0.0 or newer |
| Needs PHP | 7.4 or newer |
| First published | July 1, 2016 |
| Support, last two months | 1 of 1 threads resolved (100%) |
Reviews
4.3 / 5 from 166 reviews
| 5 stars | 132 |
|---|---|
| 4 stars | 3 |
| 3 stars | 7 |
| 2 stars | 2 |
| 1 star | 22 |
Downloads, last 30 days
What the author says it does
The reSmush.it Image Optimizer is a free WordPress image compressor and optimizer plugin which allows you to smush your website’s images so that they load faster.
The plugin is super easy to use (just 2 clicks!), supports JPG, PNG and GIF image formats and can be used to bulk optimize current (past) images and automatically optimize all new images.
You can also adjust the optimization levels and exclude certain images.
Since its launch more than 9 years ago, reSmush.it has become the preferred choice for WordPress image optimization as it allows you to smush the images for free.
reSmush.it image optimization service works on various CMS platforms (WordPress, Drupal, Joomla, Magento, Prestashop, etc.) and is used by more than 400,000 websites worldwide.
reSmush.it has earned the reputation of being the best free, fast and easy image optimization plugin out there 🙂
Features:
– Free bulk image compressor
– Automatic image optimization on upload
– Keep or remove EXIF data
– Image quality selector
– Exclude images from optimization
– Powerful and free image optimizer API
– Customizable settings for image quality
– Automatic image optimization with CRON
– Backup and restore original images
– Image statistics
– File logging for developers
Other plugins by ShortPixel:
- FastPixel Caching – WP Optimization made easy
The opening of the plugin's own description. The full text, installation notes and changelog are on its WordPress.org page.
Questions the author answers
How does reSmush.it Image Optimizer compare to other image optimization plugins (e.g. Smush, Imagify, TinyPNG, Kraken, EWWW, Optimole)?
reSmush.it Image Optimizer offers advanced image optimization and provides many of the premium features you’ll find in competing services for free.
Plus, we’ve earned a reputation for being the best free, fast and easy image optimization plugin out there:-)
How great is reSmush.it?
Since we have optimized more than 25,000,000,000 images, we have acquired new skills. Our service is still in development to bring you new useful features.
What about WebP and next-generation image formats?
We are working on a new offer to give you the best of these new features. Please be patient, it will be coming soon 🙂
Is there a function “Optimize on upload”?
Absolutely, this function is activated for all newly added images and can be deactivated if desired.
Is there a CRON function?
Yes, you can optimize your images with cronjobs for large (and also for small) media libraries.
Can I choose an optimization level?
Yes, by default the optimization level is set to “Balanced”. However, you can further optimize your images by changing the optimization level to one of the other four options.
Latest changelog entry
Release date June 16, 2026
* Fix: Resolved a PHP 8.5 deprecation notice that could appear in certain cases.
Screenshots
The simple interface 
Tagged
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Where this page's numbers come from
Read from the WordPress.org plugin API on , when WordPress 7.1.4 was the current release. WordPress.org rounds active installs into buckets. These are the directory's figures, not my verdict, and I haven't tested this plugin. The author takes donations at their donate page.