ImageOptim Alternative
Cross-platform alternative to the Mac classic.
Feature Comparison
| Feature | ImageOptim | imgfast |
|---|---|---|
| Platform | macOS only | Any browser (incl. mobile) Better |
| Price | Free (open source) Better | Free + paid tiers |
| Privacy | Local processing only Better | Server (deleted in 24h) |
| PNG compression | Excellent Better | Very good |
| PDF support | No | Yes Better |
| RAW camera files | No | Yes (Pro) Better |
| Image editor | No | Full (crop, adjust, watermarks) Better |
| Max dimensions | Not specified | 50K×50K pixels (Pro) Better |
The Honest Take
ImageOptim is one of those Mac apps that developers actually love. It's been around forever, it's free, it's open source, and it just works. Drop images in, get smaller files out. Pornel (the creator) has put years of work into optimizing the compression pipeline.
What ImageOptim nails: PNG compression specifically is exceptional—they've tuned multiple tools (pngquant, optipng, etc.) to work together. It's completely free, processes locally (your files never leave your Mac), and integrates beautifully with Finder workflows.
Where we come in: ImageOptim is Mac-only. If you're on Windows, Linux, or want to work from your phone—we've got you. We also handle PDF conversion, RAW camera files (for photographers), a full image editor (crop, brightness, contrast, watermarks), and massive images up to 50,000×50,000 pixels for infographics.
Mobile workflow: Our interface works great on phones. Content creators shoot, edit, optimize, and upload—all from their pocket. No desktop needed.
The honest take: If you're on Mac and just want excellent compression, ImageOptim is hard to beat. If you need cross-platform, format conversion, PDF/RAW support, editing, or mobile access, that's where we help.