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SPECIFICTION
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Photo Size Optimizer

effectmatrix.com

Free plan macOS
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Spec score 7.7 #17 of 28 in Photo Resizing Software

What it is

Photo Size Optimizer is a Mac app for resizing and optimizing photos, with batch processing for hundreds of images in one operation. It handles more than 70 image formats and can resize by dimensions. For PNG, JPG and GIF, it describes optimization by 80% ~ 20% while preserving resolution and quality. Its lossless mode saves more than 20% of space without changing resolution or quality; lossy mode saves more than 50% with minor quality loss. You can start processing by dragging a folder into the app, and one-click operation is available. During export, the program asks whether to overwrite original files. It supports Mac only, with the App Store listing requiring macOS 10.6 or later. The plan is free, with no in-app purchases; an original price of $29.99 as a one-time purchase is also listed. Apple’s listing says the developer does not collect data from the app.

Spec sheet

Purpose
Photo Size Optimizer is a photo resizer and optimizer for Mac.Read 1 Oct 2026 · effectmatrix.com
Privacy
Apple’s listing says the developer does not collect data from this app.Read 1 Oct 2026 · apps.apple.com
Support
EffectMatrix lists [email protected] for feedback and support requests.Read 1 Oct 2026 · effectmatrix.com
Batch processing
It supports batch resizing of hundreds of photos with one click.Read 1 Oct 2026 · apps.apple.com
Compatibility
The App Store listing requires macOS 10.6 or later and supports Mac only.Read 1 Oct 2026 · apps.apple.com
Compression
It optimizes photos by 80% ~ 20% while keeping original resolution and quality in PNG, JPG and GIF formats.Read 1 Oct 2026 · effectmatrix.com
Folder workflow
Dragging a folder into the application starts processing immediately.Read 1 Oct 2026 · apps.apple.com
Format support
The app supports 70+ image formats for resizing.Read 1 Oct 2026 · apps.apple.com
Lossless mode
Lossless mode saves more than 20% of space while retaining original resolution and quality.Read 1 Oct 2026 · apps.apple.com
Lossy mode
Lossy mode saves more than 50% of space with minor quality loss.Read 1 Oct 2026 · effectmatrix.com
Maker history
EffectMatrix Software Studio says it was founded in 2002 and provides multimedia and photo graphic design software.Read 1 Oct 2026 · svgvector.com
One-click operation
The app provides one-click photo size optimization on Mac OS X.Read 1 Oct 2026 · effectmatrix.com
Overwrite control
The program asks whether to overwrite original files during export.Read 1 Oct 2026 · apps.apple.com
Payment security
EffectMatrix says PayPal encrypts customer personal information before it is sent to the company.Read 1 Oct 2026 · effectmatrix.com

Plans and prices

Photo Size Optimizer Free Free Mac only · no in-app purchases · 2.8 MB Read 1 Oct 2026 · apps.apple.com
Original price $29.99, paid once Original $ 29.99 Mac only Read 1 Oct 2026 · apps.apple.com

Every Photo Size Optimizer plan and price →

Strong points and limits

Strong points

  • Batch resizing handles hundreds of photos.
  • Supports more than 70 image formats.
  • Lossless mode retains resolution and quality.
  • Prompts before overwriting original files.

Limits

  • Mac only; requires macOS 10.6 or later.
  • Lossy mode entails minor quality loss.

Who it suits

It suits Mac users who want to resize or optimize batches of photos, including people working with a range of image formats. Its lossless and lossy modes offer different space-saving options.

Verdict

Photo Size Optimizer specifies a simple batch workflow, format support and two compression modes. Check the Mac-only requirement and choose a mode based on whether preserving quality or saving more space matters more.

Where Specifiction places it

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