reSmush.it 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: reSmush.it at #9 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.
reSmush.it
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.
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.
Robin Image Optimizer ranks higher on WordPress.org: #7 against #9 in Image Optimization Plugins.
Both report 100,000+ active installs on WordPress.org.
Robin Image Optimizer is rated higher: 4.4 out of 5 from 129 reviews, against 4.3 from 165 reviews.
reSmush.it has more reviews behind its score: 165 against 129.
Robin Image Optimizer was updated more recently, on August 20, 2026; reSmush.it on August 20, 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.
reSmush.it
Pick reSmush.it if you want the score backed by more reviews.
Robin Image Optimizer
Pick Robin Image Optimizer if you go by where WordPress.org itself puts them, the review score matters most to you or you want the one shipping releases most recently.
reSmush.it vs Robin Image Optimizer side by side
| reSmush.it | Robin Image Optimizer | |
|---|---|---|
| Image Optimization Plugins ranking | #9 | #7 |
| Rating | 4.3 | 4.4 |
| Reviews | 165 | 129 |
| Active installs | 100,000+ | 100,000+ |
| Total downloads | 3,586,737 | 2,220,743 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 20, 2026 | Aug 20, 2026 |
| First published | Jul 1, 2016 | Aug 12, 2018 |
| Tested up to WordPress | 7.1 | 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.
reSmush.it 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 reSmush.it 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.
reSmush.it vs Robin Image Optimizer: common questions
Is reSmush.it 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. Robin Image Optimizer ranks higher on WordPress.org: #7 against #9 in Image Optimization Plugins.
Which has more users, reSmush.it or Robin Image Optimizer?
Robin Image Optimizer ranks higher on WordPress.org: #7 against #9 in Image Optimization Plugins.
Which is rated higher, reSmush.it or Robin Image Optimizer?
Both report 100,000+ active installs on WordPress.org.
Are reSmush.it and Robin Image Optimizer free?
Both are free to install from WordPress.org. reSmush.it may also sell a paid version or add-ons. Robin Image Optimizer may also sell a paid version or add-ons.
Alternatives to reSmush.it 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.