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Quick verdict on Smush
Smush has been the most-installed WordPress image optimization plugin since the mid-2010s. The free version handles lossless compression on upload, lazy loading, and bulk smushing of existing media library images. The Pro version adds WebP conversion (significant — WebP files are typically 25-35% smaller than equivalent JPEGs), CDN integration, and lossy compression. For sites uploading lots of photographic content, WebP conversion is the feature that pays for Pro. For sites with mostly UI graphics and screenshots, the free tier covers everything important. The main alternative is ShortPixel, which uses a different compression algorithm and is generally slightly more aggressive on file size reduction at the cost of slightly more processing time. EWWW Image Optimizer is the budget choice — fully free, runs on your own server (no upload to external API), but less polished UI and fewer features.
Specs at a glance
| Vendor | WPMU DEV |
| Pricing | Free / Pro $7.50/mo |
| Active installs | 1M+ |
| Type | Image optimization |
| Support rating | 4.6 / 5 |
| Released | 2013 |
What Smush does best
Best for: Any site that uploads images and wants automatic compression
- Lossless compression by default
- Lazy loading
- WebP conversion (Pro)
- Bulk smush up to 50 images at once
Where Smush falls short
Free tier compresses lossy-only up to 5MB images; advanced features are Pro
Should you use Smush in 2026?
Smush is a image optimization plugin from WPMU DEV, used on over 1M+ WordPress sites worldwide. The pricing is Free / Pro $7.50/mo. The recommendation depends on whether your situation matches what Smush is best at: any site that uploads images and wants automatic compression. If yes, install it. If your priorities are different, consider alternatives that fit better.
Common questions
Is Smush free?
Smush has a free tier. Paid tiers unlock additional features.
Does Smush slow down WordPress?
Every WordPress plugin adds some overhead. The relevant question is whether the value justifies the overhead. For Smush, the answer is generally yes — the plugin is well-optimized and impact on page load is minimal on well-configured hosting.
What's the best alternative to Smush?
The most direct alternatives depend on what you're optimizing for. See our complete WordPress plugin rankings.