Image Optimization vs Robin Image Optimizer (September 2026)
Updated September 7, 2026 · Data from WordPress.org, refreshed daily · How this works
Both rank in the WordPress.org Image Optimization Plugins top 10: Image Optimization at #1 and Robin Image Optimizer at #7. Robin Image Optimizer leads on 3 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
Image Optimization
Image Optimization – Compress Images and Convert to WebP or AVIF
Automatically resize, optimize, and convert images to WebP and AVIF. Compress images in bulk or on upload to boost your WordPress site performance.
Robin Image Optimizer
Robin Image Optimizer – Unlimited Image Optimization, WebP & AVIF
Unlimited automatic image optimization for WordPress. Compress images, convert to WebP, and improve site speed without losing image quality.
Who leads on what
Robin Image Optimizer leads on 3 of the 5 measures we track.
Image Optimization ranks higher on WordPress.org: #1 against #7 in Image Optimization Plugins.
Image Optimization has more users: 1 million+ active installs against 100,000+.
Robin Image Optimizer is rated higher: 4.4 out of 5 from 129 reviews, against 1.7 from 77 reviews.
Robin Image Optimizer has more reviews behind its score: 129 against 77.
Robin Image Optimizer was updated more recently, on August 20, 2026; Image Optimization on July 7, 2026.
Which one to pick
Each plugin is the better answer for the measure it actually leads on. Nothing here is a recommendation we invented.
Image Optimization
Pick Image Optimization if you go by where WordPress.org itself puts them or you want the plugin more sites already run.
Robin Image Optimizer
Pick Robin Image Optimizer if the review score matters most to you, you want the score backed by more reviews or you want the one shipping releases most recently.
Image Optimization vs Robin Image Optimizer side by side
| Image Optimization | Robin Image Optimizer | |
|---|---|---|
| Image Optimization Plugins ranking | #1 | #7 |
| Rating | 1.7 | 4.4 |
| Reviews | 77 | 129 |
| Active installs | 1 million+ | 100,000+ |
| Total downloads | 15,619,885 | 2,220,743 |
| Downloads, last 30 days | – | – |
| Last updated | Jul 7, 2026 | Aug 20, 2026 |
| First published | Jan 8, 2024 | Aug 12, 2018 |
| Tested up to WordPress | 7.0.4 | 7.1 |
| Requires PHP | 7.4 | 7.4 |
| Pricing | Free on WordPress.org | Free on WordPress.org |
30-day download figures appear after both plugins have 30 days of tracking.
Image Optimization ratings
Robin Image Optimizer ratings
How we compare these two
Every figure here is pulled from the WordPress.org plugin API every day at 03:00 UTC, for both plugins in the same run, so the two are always read on the same day. We compare only what the directory reports: active installs, the rating and how many reviews stand behind it, the last release date and, once we have a month of history, downloads over the last 30 days. Ratings are only called a win above 50 reviews each, because a handful of five-star reviews is not evidence. Nothing is weighted into an overall score, no measure is worth more than another, and neither Image Optimization nor Robin Image Optimizer can pay to appear here: the pair exists only because both plugins reached the Image Optimization Plugins top 10. Full methodology.
Image Optimization vs Robin Image Optimizer: common questions
Is Image Optimization better than Robin Image Optimizer?
Robin Image Optimizer leads on 3 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. Image Optimization ranks higher on WordPress.org: #1 against #7 in Image Optimization Plugins.
Which has more users, Image Optimization or Robin Image Optimizer?
Image Optimization ranks higher on WordPress.org: #1 against #7 in Image Optimization Plugins.
Which is rated higher, Image Optimization or Robin Image Optimizer?
Image Optimization has more users: 1 million+ active installs against 100,000+.
Are Image Optimization and Robin Image Optimizer free?
Both are free to install from WordPress.org. Image Optimization may also sell a paid version or add-ons. Robin Image Optimizer may also sell a paid version or add-ons.
Alternatives to Image Optimization and Robin Image Optimizer
Plugins that score close to both in the same WordPress.org rankings and tags.
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What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.