Photo Size Optimizer
Photo Size Optimizer is a Mac app for resizing and optimizing photos.
What Photo Size Optimizer is
Photo Size Optimizer is a Mac app for resizing and optimizing photos. It offers one-click optimization, and dropping a folder into the app starts processing immediately. Batch resizing can handle hundreds of photos at once, and the app supports more than 70 image formats. Its lossless mode saves more than 20% of space while retaining original resolution and quality; lossy mode saves more than 50% with minor quality loss. The listed optimization for PNG, JPG, and GIF is 80% ~ 20% while keeping original resolution and quality. During export, the app asks whether to overwrite original files. The App Store listing requires macOS 10.6 or later, and the app supports Mac only. It is listed as free, with no in-app purchases; an original price of $29.99, paid once is also shown. Apple’s listing says the developer does not collect data from this app.
Good
- Batch-resizes hundreds of photos with one click.
- Folder drops start processing immediately.
- Supports more than 70 image formats.
- Offers lossless and lossy modes.
- Asks before overwriting original files.
Watch out
- Supports Mac only.
- Requires macOS 10.6 or later.
- Lossy mode involves minor quality loss.
Who it suits
It suits Mac users who want to resize or optimize many images at once, including users who need lossless or lossy compression options. Check that your Mac meets the macOS 10.6-or-later requirement.
Verdict
Photo Size Optimizer combines batch resizing with two compression modes and broad image-format support. Its Mac-only availability and stated system requirement are key considerations.
Plans and prices
From Photo Size Optimizer's own pricing page, checked 1 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Photo Size Optimizer | Free | Mac only · no in-app purchases · 2.8 MB · Free |
| Original price | $29.99, paid once | Mac only · Original $ 29.99 |
The facts
Each one read from Photo Size Optimizer's own pages, with the date it was checked.
What it does
- Batch processing
- It supports batch resizing of hundreds of photos with one click.checked 1 Oct 2026
- Compatibility
- The App Store listing requires macOS 10.6 or later and supports Mac only.checked 1 Oct 2026
- Compression
- It optimizes photos by 80% ~ 20% while keeping original resolution and quality in PNG, JPG and GIF formats.checked 1 Oct 2026
- Folder workflow
- Dragging a folder into the application starts processing immediately.checked 1 Oct 2026
- Format support
- The app supports 70+ image formats for resizing.checked 1 Oct 2026
- Lossless mode
- Lossless mode saves more than 20% of space while retaining original resolution and quality.checked 1 Oct 2026
- Lossy mode
- Lossy mode saves more than 50% of space with minor quality loss.checked 1 Oct 2026
- One-click operation
- The app provides one-click photo size optimization on Mac OS X.checked 1 Oct 2026
- Overwrite control
- The program asks whether to overwrite original files during export.checked 1 Oct 2026
- Payment security
- EffectMatrix says PayPal encrypts customer personal information before it is sent to the company.checked 1 Oct 2026
- Privacy
- Apple’s listing says the developer does not collect data from this app.checked 1 Oct 2026
- Purpose
- Photo Size Optimizer is a photo resizer and optimizer for Mac.checked 1 Oct 2026
- Support
- EffectMatrix lists [email protected] for feedback and support requests.checked 1 Oct 2026
The company
- Maker history
- EffectMatrix Software Studio says it was founded in 2002 and provides multimedia and photo graphic design software.checked 1 Oct 2026
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