Honest comparison · Updated 2026-05-15
QuickPix vs ImageOptim
ImageOptim is a beloved open-source image compressor for Mac. Designers and developers have used it for over a decade. QuickPix is a newer entrant that takes a different technical approach. Here's a clear-eyed comparison so you can pick what fits your workflow.
Dimension-by-dimension
| Dimension | QuickPix | ImageOptim | Edge |
|---|---|---|---|
| Compression engine | macOS's built-in sips engine, plus configurable quality and format conversion. Native performance, sandbox-safe. | Bundles MozJPEG, pngquant, Pngcrush, Google Zopfli — battle-tested compressors known to produce smaller files than sips in many cases. | |
| Format support | PNG, JPEG, HEIC, WebP, TIFF, GIF, JPEG 2000 — 28+ formats including HEIC compression (rare). | JPEG, PNG, GIF, SVG, WebP. Strong on classic web formats. HEIC support is limited. | |
| Batch processing | Drag a folder; QuickPix processes everything with the same preset. Live progress with file counts. | Drag-drop multi-file batch with progress. Mature and stable. | |
| Folder watching (auto-compress) | Pro feature: watch a folder, auto-compress new images as they arrive. Designed for design teams who get assets via Dropbox / Slack / Finder. | Not a built-in feature. Possible to script via Automator/Hazel but requires setup. | |
| Before / after comparison | Built-in slider view shows pixel-level before/after with synchronized zoom. | Shows file sizes; no built-in visual comparison. | |
| Pricing | Free tier is unlimited (no daily caps). Pro is a one-time purchase for power features. | Free and open-source. No paid tier. | |
| Update cadence | Active development as part of the Obelisk Club portfolio. | Open source, but updates have slowed in recent years — the last major release was a while ago. |
QuickPix advantage · ImageOptim advantage · roughly equal
Where QuickPix wins
- Folder watching for designers. If you drop new screenshots / exports / Slack receipts into a folder and want them compressed automatically, QuickPix Pro handles that without scripting.
- Visual before/after slider for quality verification, especially useful for product photography and marketing assets where 'looks identical' matters more than absolute file size.
- HEIC native compression. Apple's modern image format isn't ImageOptim's strong suit. If you're shrinking Photos library exports or recent iPhone exports, this matters.
- Active maintenance. ImageOptim is stable but the open-source repo doesn't ship monthly anymore. QuickPix is being actively iterated.
Where ImageOptim wins
- Best-in-class compression algorithms. MozJPEG and Zopfli often produce smaller files than sips at the same visual quality. If absolute byte-count is your primary metric, ImageOptim usually wins on JPEG.
- Free, open-source, no purchase decision. ImageOptim has zero friction to install. Nothing to pay, ever. For pure cost-conscious workflows, hard to beat.
Pick QuickPix if…
You want folder-watching automation, HEIC support, the visual comparison slider, and the simpler one-app workflow. You're OK paying for the Pro features.
See QuickPixPick ImageOptim if…
You want the absolute smallest JPEG output, you're OK without auto-folder workflows, and you prefer free / open source. ImageOptim is the right tool.
Visit ImageOptim siteBoth tools are honest about what they do. ImageOptim has a longer track record on aggressive JPEG compression; QuickPix is opinionated about workflow integration on modern macOS. Many designers I know use both — ImageOptim for final-pass compression before shipping, QuickPix for everyday batch and folder watching.
Frequently asked questions
What's the main difference between QuickPix and ImageOptim?+
ImageOptim is a beloved open-source image compressor for Mac. Designers and developers have used it for over a decade. QuickPix is a newer entrant that takes a different technical approach. Here's a clear-eyed comparison so you can pick what fits your workflow.
Should I choose QuickPix or ImageOptim?+
Pick QuickPix if: You want folder-watching automation, HEIC support, the visual comparison slider, and the simpler one-app workflow. You're OK paying for the Pro features. Pick ImageOptim if: You want the absolute smallest JPEG output, you're OK without auto-folder workflows, and you prefer free / open source. ImageOptim is the right tool.
What can QuickPix do that ImageOptim can't?+
Folder watching for designers. If you drop new screenshots / exports / Slack receipts into a folder and want them compressed automatically, QuickPix Pro handles that without scripting. Visual before/after slider for quality verification, especially useful for product photography and marketing assets where 'looks identical' matters more than absolute file size. HEIC native compression. Apple's modern image format isn't ImageOptim's strong suit. If you're shrinking Photos library exports or recent iPhone exports, this matters.
Where does ImageOptim win over QuickPix?+
Best-in-class compression algorithms. MozJPEG and Zopfli often produce smaller files than sips at the same visual quality. If absolute byte-count is your primary metric, ImageOptim usually wins on JPEG. Free, open-source, no purchase decision. ImageOptim has zero friction to install. Nothing to pay, ever. For pure cost-conscious workflows, hard to beat.
How much does QuickPix cost compared to ImageOptim?+
QuickPix: Free tier is unlimited (no daily caps). Pro is a one-time purchase for power features. ImageOptim: Free and open-source. No paid tier.