Robin Image Optimizer vs ShortPixel 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: Robin Image Optimizer at #7 and ShortPixel Image Optimizer at #8. ShortPixel Image Optimizer leads on 3 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
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.
ShortPixel Image Optimizer
ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF
Optimize images & PDFs smartly. Create and compress next-gen WebP and AVIF formats. Smart crop and resize.
Who leads on what
ShortPixel Image Optimizer leads on 3 of the 5 measures we track.
Robin Image Optimizer ranks higher on WordPress.org: #7 against #8 in Image Optimization Plugins.
ShortPixel Image Optimizer has more users: 300,000+ active installs against 100,000+.
ShortPixel Image Optimizer is rated higher: 4.5 out of 5 from 819 reviews, against 4.4 from 129 reviews.
ShortPixel Image Optimizer has more reviews behind its score: 819 against 129.
Robin Image Optimizer was updated more recently, on August 20, 2026; ShortPixel Image Optimizer 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.
Robin Image Optimizer
Pick Robin Image Optimizer if you go by where WordPress.org itself puts them or you want the one shipping releases most recently.
ShortPixel Image Optimizer
Pick ShortPixel Image Optimizer if you want the plugin more sites already run, the review score matters most to you or you want the score backed by more reviews.
Robin Image Optimizer vs ShortPixel Image Optimizer side by side
| Robin Image Optimizer | ShortPixel Image Optimizer | |
|---|---|---|
| Image Optimization Plugins ranking | #7 | #8 |
| Rating | 4.4 | 4.5 |
| Reviews | 129 | 819 |
| Active installs | 100,000+ | 300,000+ |
| Total downloads | 2,220,743 | 19,829,492 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 20, 2026 | Aug 20, 2026 |
| First published | Aug 12, 2018 | Nov 5, 2014 |
| 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.
Robin Image Optimizer ratings
ShortPixel 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 Robin Image Optimizer nor ShortPixel Image Optimizer can pay to appear here: the pair exists only because both plugins reached the Image Optimization Plugins top 10. Full methodology.
Robin Image Optimizer vs ShortPixel Image Optimizer: common questions
Is Robin Image Optimizer better than ShortPixel Image Optimizer?
ShortPixel 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 #8 in Image Optimization Plugins.
Which has more users, Robin Image Optimizer or ShortPixel Image Optimizer?
Robin Image Optimizer ranks higher on WordPress.org: #7 against #8 in Image Optimization Plugins.
Which is rated higher, Robin Image Optimizer or ShortPixel Image Optimizer?
ShortPixel Image Optimizer has more users: 300,000+ active installs against 100,000+.
Are Robin Image Optimizer and ShortPixel Image Optimizer free?
Both are free to install from WordPress.org. Robin Image Optimizer may also sell a paid version or add-ons. ShortPixel Image Optimizer may also sell a paid version or add-ons.
Alternatives to Robin Image Optimizer and ShortPixel Image Optimizer
Plugins that score close to both in the same WordPress.org rankings and tags.
More Image Optimization Plugins comparisons
- EWWW Image Optimizer vs Robin Image Optimizer
- EWWW Image Optimizer vs ShortPixel Image Optimizer
- Image Optimization vs Robin Image Optimizer
- Image Optimization vs ShortPixel Image Optimizer
- Imagify vs Robin Image Optimizer
- Imagify vs ShortPixel Image Optimizer
- Optimole vs Robin Image Optimizer
- Optimole vs ShortPixel Image Optimizer
- reSmush.it vs Robin Image Optimizer
- reSmush.it vs ShortPixel Image Optimizer
- Robin Image Optimizer vs Converter for Media
- Robin Image Optimizer vs Smush
Weekly · free
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.