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  4. Cimo – Free Instant Image Optimizer &…
Cimo – Free Instant Image Optimizer & WebP Converter icon

Cimo – Free Instant Image Optimizer & WebP Converter

Unlimited free image compression and WebP conversion, done instantly as you upload them. No quotas, no external servers, no limits.

By Benjamin Intal·Webp·Free
4.8(12 reviews)
·6.0K+ active installs·Updated 2 days ago
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As of April 2026, Cimo is a WordPress webp plugin with 6.0K+ active installations and a 4.8/5 rating from 12 reviews. It has been downloaded 25K+ times in total. Requires WordPress 6.7.5+ and PHP 8.0+. Available on WordPress.org since 2025. Actively maintained — updated within the last month. Downloads are up 483% this week. Support resolution rate: 100%. Top alternative: EWWW Image Optimizer.

4.8/512 reviews
6.0K+active installs
100%resolved
1 yearsince 2025

Overview

Optimize all your images instantly and for free.

Cimo is a game-changer for media optimization. It optimizes, resizes, and converts your images instantly as you upload — even before the files are added to your Media Library.

Visit Cimo’s website to learn more about how Cimo does things.

From WordPress’ point of view, it’s as if you optimized your image BEFORE your uploaded it. Now, this is next-next-gen image optimization.

Cimo works like magic, drag your large image file, and an optimized image will automatically appear in your Media Library. This ensures your website load speed is perfectly optimized by keeping image sizes minimal, without compromising quality.

  • Unlimited usage – upload as many images as you want
  • Instant optimization – virtually no waiting…
Read full description on WordPress.org

Screenshots

Ratings & Reviews

4.812 reviews
5 ★
9
4 ★
3
3 ★
0
2 ★
0
1 ★
0

Recent Reviews

Works perfect!
by renemwor·1 week ago

I really like this plugin. Set and forget! Limited options in the free version, but most of the time this is perfect.

5 star because we cannot give more
by Quentin Le Duff·1 week ago

Awesome plugin, directly goes to my default install list ! Thank you for the great work !

Was 5 star, now broken. Back to 1.2.0
by Jason L·1 month ago·6 replies

used to work perfectly. I wish I could find older versions, as 1.2.2 no longer automatically converts images when uploaded. never should have updated. so annoying, and now looking for a new solution.

update after dev response: I updated to 1.2.2 on other sites, and all have broken functionality. Will revisit this review after the next update.

Update after the update: I had to roll back to 1.2.0, and you can find that here in a dropdown menu at the bottom of the content area: https://wordpress.org/plugins/cimo-image-optimizer/advanced/

  • This topic was modified 4 weeks ago by Jason L. Reason: more installs are no longer functioning after 1.2.2 update
  • This topic was modified 4 weeks ago by Jason L.
Converts ALL Images
by manni65929·2 months ago

Cimo converts all images that are uploaded. That includes PNG-Files wich you may need for the favicon / site icon. There appears to be no way to avoid except for disabling Cimo. 🙁

Fantastic! Crystal-clear images, super-fast upload!
by alamea·4 months ago

I uploaded 5 images between 6 MB and 20 MB in less than 3 seconds. And the plugin works perfectly with Image Regenerate & Select Crop. All my custom image styles were cleanly applied and compressed to a minimal file size, and the whole thing is crystal clear. Thanks for your development. Fantastic work!

Download Trends

Today: 238Yesterday: 2KThis week: 5KPeriod total: 26K

Compatibility

WordPress6.7.5+ requiredTested up to 6.9.4
PHP8.0+ required

Version Adoption

v1.2
97.0%
Other
3.0%

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Frequently Asked Questions

Changelog

1.3.1

  • Fixed: Optimization metadata may not be attached if uploading images with the same filename #40
  • Fixed: Added view all stats link
  • Fixed: Added upgrade links
View full changelog on WordPress.org

Contributors

Benjamin IntalBenjamin Intalgambitphgambitph
Plugin Info
Version
1.3.1
Last Updated
Apr 2, 2026
WP Requires
6.7.5+
Tested Up To
6.9.4
PHP Requires
8.0+
Active Installs
6.0K+
Downloads
25K+
Added
Aug 29, 2025
Business
Free

Tags

webpimageconvertcompressoptimization

Developer

B
Benjamin Intal
10 plugins0.1M+ total installs
View all plugins →

Quick Compare

Cimo – Free Instant Image Optimizer &… vs EWWW Image Optimizer→Cimo – Free Instant Image Optimizer &… vs Smush – Image Optimization…→Cimo – Free Instant Image Optimizer &… vs Converter for Media – Optimize images |…→

Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.