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Photo Size Optimizer
What it is
Photo Size Optimizer is a Mac app for resizing and optimizing photos, with one-click processing and batch resizing of hundreds of images. Dropping a folder into the app starts processing immediately. It supports more than 70 image formats for resizing, with listed output formats including JPG, BMP, PNG, GIF, and PDF. Lossless mode is described as saving more than 20% of space while preserving original resolution and quality; lossy mode saves more than 50% with minor quality loss. The app also lists optimization for PNG, JPG, and GIF photos by 80% ~ 20% while keeping original resolution and quality. During export, it asks whether to overwrite original files. Photo Size Optimizer is listed as free, with no in-app purchases; an original price of $29.99, paid once is also listed. The App Store listing requires macOS 10.6 or later and supports Mac only. Apple’s listing says the developer does not collect data from this app.
For and against
For
- Batch-resizes hundreds of photos
- Supports more than 70 image formats
- Lossless mode retains original resolution and quality
- Asks before overwriting original files
Against
- Supports Mac only
- Lossy mode involves minor quality loss
- App Store listing requires macOS 10.6 or later
The verdict
Photo Size Optimizer offers one-click and batch workflows, with both lossless and lossy modes. It is limited to Mac, and its lossy option trades some image quality for space savings.
Who it suits
It suits Mac users who want to resize or optimize batches of photos and folders. Users who need to retain original image quality can consider its lossless mode.
Plans and prices
Photo Size Optimizer
Mac only · no in-app purchases · 2.8 MB
Read 1 Oct 2026 · apps.apple.com
Original price
Mac only
Read 1 Oct 2026 · apps.apple.com
On the record
- Batch processing
- It supports batch resizing of hundreds of photos with one click.apps.apple.com · read 1 Oct 2026
- Compatibility
- The App Store listing requires macOS 10.6 or later and supports Mac only.apps.apple.com · read 1 Oct 2026
- Compression
- It optimizes photos by 80% ~ 20% while keeping original resolution and quality in PNG, JPG and GIF formats.effectmatrix.com · read 1 Oct 2026
- Folder workflow
- Dragging a folder into the application starts processing immediately.apps.apple.com · read 1 Oct 2026
- Format support
- The app supports 70+ image formats for resizing.apps.apple.com · read 1 Oct 2026
- Lossless mode
- Lossless mode saves more than 20% of space while retaining original resolution and quality.apps.apple.com · read 1 Oct 2026
- Lossy mode
- Lossy mode saves more than 50% of space with minor quality loss.effectmatrix.com · read 1 Oct 2026
- Maker history
- EffectMatrix Software Studio says it was founded in 2002 and provides multimedia and photo graphic design software.svgvector.com · read 1 Oct 2026
- One-click operation
- The app provides one-click photo size optimization on Mac OS X.effectmatrix.com · read 1 Oct 2026
- Overwrite control
- The program asks whether to overwrite original files during export.apps.apple.com · read 1 Oct 2026
- Payment security
- EffectMatrix says PayPal encrypts customer personal information before it is sent to the company.effectmatrix.com · read 1 Oct 2026
- Privacy
- Apple’s listing says the developer does not collect data from this app.apps.apple.com · read 1 Oct 2026
- Purpose
- Photo Size Optimizer is a photo resizer and optimizer for Mac.effectmatrix.com · read 1 Oct 2026
- Support
- EffectMatrix lists [email protected] for feedback and support requests.effectmatrix.com · read 1 Oct 2026
