by Benjamin Intal 4.9 (16 reviews)

Cimo - Free Instant Image Optimizer & WebP Converter

Name: Cimo - Free Instant Image Optimizer & WebP Converter
Rating: 4.9 (16 reviews)
Author: Benjamin Intal

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

Cimo ranks #2,148 among WordPress.org plugins with 10,000+ active installations, is #192 of 6,299 in the Media category, a 4.9/5 rating from 16 reviews, and was last updated Aug 12, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 7 (Current: 7.1)

v1.4.2 Current Version v1.4.2

Updated 1 month ago Last Update on 12 Aug, 2026

Refreshed 6 hours ago Last Refreshed on

#192 of 6,299 in Media Top 5% by installs Downloads -34% this week

View on WordPress.org

Rank

#2,148

+1 this week

Active Installs

10K+

+2.5%

KW Avg Position

19.4

0.2 worse

Downloads

20.4K

+55 today

Support Resolved

75%

— No change

Rating

98%

Review 4.9 out of 5

4.9 (16 reviews)

Next Milestone 20K

Total Progress 9.2%

10K+ 20K+

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Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #2,148

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

4.9

16 reviews

Overall 98%

14 (88%)

2 (13%)

0 (0%)

Support Threads Overview

Resolved

Unresolved

Total Threads

Resolved

Unresolved

75%

Resolution Rate

Security History

Source: WPVulnerability

No known vulnerabilities on record for Cimo. Checked 1 day ago.

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Plugin Details

Version: 1.4.2
Last Updated: Aug 12, 2026
Requires WP: 7.0.3+
Tested Up To: 7
PHP Version: 8.0 or higher
Author: Benjamin Intal

Support & Rating

Rating: ★ ★ ★ ★ ★ 4.9
Reviews: 16
Support Threads: 4
Resolved: 75%

Keywords

compress convert image optimization webp

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TL;DR

AI summary of the plugin's readme

This plugin is for WordPress site owners, content creators, and developers who upload images and want them optimized without server load. It solves image file size and format problems by compressing and converting images to WebP instantly in the browser during upload, before they're saved to the Media Library.

Instant browser-based optimization
Automatic WebP conversion
Unlimited usage, no quotas
No external image-processing services
Adjustable WebP quality setting
Max image dimension resizing
Selective thumbnail size control
Statistics dashboard for savings

Frequently Asked Questions

Common questions about Cimo - Free Instant Image Optimizer & WebP Converter

Unlike server-side plugins, Cimo processes everything in your browser. No external APIs, no server processing, no waiting - just instant optimization as you upload.

When you upload an image into your Media Manager (let's say a .jpg), you'll notice that after uploading, it will be a .webp image! You will also find some additional information in the Media Manager about your uploaded image.

Cimo works in all modern browsers including Chrome, Firefox, Edge, and Opera. In Safari, images will be optimized but will keep their original file format. WebP conversion is not supported in Safari.```

Yes! Unlike other plugins that charge per image or have monthly quotas, Cimo's image optimization and compression is completely unlimited and free forever.

No! Cimo processes everything locally in your browser. Your media assets never leave your device until they're uploaded to your WordPress site, nor do they go to another server for processing.

Our browsers right now are quite powerful and already have the capabilities for converting images to different formats. At the very core, the conversion is done via a clever use of JavaScript's Canvas API to process your images in the browser right before they're uploaded to WordPress. This means faster uploads, no server load, and complete privacy.

Currently WebP conversion is fully supported.

Cimo optimizes images during the upload process. For existing images, we have bulk optimization available in Cimo Premium. Learn more on our pricing page.

Yes Cimo can convert video and audio files, but that's in our premium version, check out website for more information on it.

Actually, it speeds them up! Since images are compressed before upload, they transfer faster and take up less storage space.