WordPress plugin comparison

Simple Image Sizes vs Image Optimizer, Resizer and CDN

Simple Image Sizes

by Nicolas Juen

60K+ installs4.6

Image Optimizer, Resizer and CDN

by Sirv CDN and Image Hosting

900+ installs4.9

At a glance

Simple Image Sizes has more active installs: 60K+, against 900+ for Image Optimizer, Resizer and CDN.
On a typical day, Simple Image Sizes is downloaded about 233 times, Image Optimizer, Resizer and CDN about 96.
Image Optimizer, Resizer and CDN is rated higher: 4.9 out of 5 from 265 reviews, against 4.6 from 91 reviews.
Image Optimizer, Resizer and CDN was updated more recently: Oct 31, 2026, against Aug 17, 2026 for Simple Image Sizes.
Both are tested up to WordPress 7.1.4.
Simple Image Sizes has been around longer: since 2011, against 2015 for Image Optimizer, Resizer and CDN.

Simple Image Sizes leads on 4 of 6 comparable lines.

Metric	Simple Image Sizes	Image Optimizer, Resizer and CDN
Popular rank	#660	#7,007
Active installs	60K+	900+
Downloads, last 30 days	7.7K	2.4K
Rating	4.6(91)	4.9(265)
Support threads resolved	0%	–
Tested up to	7.1.4	7.1.4
Search multiplier	×1.04	×0.61
Last release	2 months ago	9 days ago
Requires PHP	8.0	5.6

From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.

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