Comparison Guide
All features. Cross-platform. Latest compression engine.
See why Karui is the best value for image compression.
Half the price of JPEGmini. Better compression than Optimage. Works on Windows too.
| Feature | Karui | JPEGmini | Optimage | ImageOptim | Squoosh |
|---|---|---|---|---|---|
| Compression | Yes | Yes | Yes | Yes | Yes |
| Resize | Yes | Yes | Yes | No | Yes |
| Crop | Yes | No | No | No | No |
| Batch Processing | Yes | Yes | Yes | Yes | No |
| macOS | Yes | Yes | Yes | Yes | Web |
| Windows | Yes | Yes | No | No | Web |
| Compression Engine | Karui Engine | Proprietary | Proprietary | MozJPEG | Multiple |
| Offline / Privacy | 100% Local | Local | Local | Local | Requires Browser |
| Price | $29 Free: 20/day | $59-89 | $15 | Free | Free |
| Image | Original | Optimage | Karui | Karui Advantage |
|---|---|---|---|---|
| macOS Catalina wallpaper | 214KB | 101KB (53%) | 76KB (64%) | +11% |
| Apple Event 2x | 280KB | 113KB (60%) | 79KB (72%) | +12% |
| Model S | 372KB | 91KB (75%) | 78KB (79%) | +4% |
| CRS-4 | 342KB | 155KB (55%) | 83KB (76%) | +21% |
| WWDC19 Robot | 445KB | 154KB (65%) | 109KB (75%) | +10% |
| Total | 1.65MB | 614KB (63%) | 425KB (74%) | +11% |
* Test images from Optimage's official sample set. January 2026.
JPEGmini is an excellent tool, but at $59-89, it's expensive. Karui offers:
Bottom line: If you're looking for JPEGmini but want to save money, Karui is the answer.
Optimage is great for Mac users, but Karui goes further:
Bottom line: Better compression, more features, and works on Windows too.
ImageOptim is free and excellent, but has limitations:
Bottom line: If you need resize/crop or use Windows, Karui fills the gap.
Squoosh (by Google) is powerful but web-based:
Bottom line: For batch work or offline use, Karui is the pro choice.
FastStone Photo Resizer is feature-rich but showing its age:
Bottom line: If you use both Mac and Windows, Karui offers a unified experience.
