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Put your images on a diet.
Photo Size Optimizer is a powerful photo resizer and optimizer. It optimizes photos by 80% ~ 20% while keeping original resolution, quality in png, jpg, gif formats. It makes it easy for you to store & transfer files without visible quality loss.

Photo Size Optimizer also supports batch resizing hundreds of photos quickly and easily with one click. It supports 70+ image formats for resizing:

Key Features:

• 'Bulk' optimization with one-click.

• Easy management: When a folder is dragged into the application, Photo Size Optimizer will work on it immediately.

• Support 70 types of image formats for resizing.

• The program solicits whether to overwrite the original files while exporting.

• More choices:
- Lossless mode will save more than 20% space. Lossless mode compresses and reduces large JPG, PNG, GIF (still & animated) images significantly but keep the original resolution, quality.
- Lossy mode will save more than 50% space with minor quality loss.

With Photo Size Optimizer, you can save huge space and share full-resolution photos with your friends much faster. Download it Now!

Any suggestion will be appreciated, support email:

What’s New

Version 1.70

New feature: The program solicits whether to overwrite the original files while exporting.
Major bugs were fixed:
1.The filename extension after saving may disaccord with that of original.
2.The capital file format .JPG was tampered into lowercase .jpg without any hint.
3.The dimensionality remains unchanged while resizing.
4.The result of resizing lacks conformity with what was set.
5.The interface will not response if a folder is being create while exporting.

Ratings and Reviews

4.2 out of 5
28 Ratings
28 Ratings
Jake Bluez ,

Excellent photo size reduction without noticable loss in quality.

I use this app to batch-shrink the size of photos I take with my camera before I upload them to the web and it does an amazing job. Shrinks 1.5 Gig photos to 10 or 15% of their original size without any apparant loss, and it does groups of them at once. I upload real estate photos and they have to look very good … and they do. This app is an outstanding value. This app is very reliable and very fast. Shrinks 60 large photos in about 10 seconds. Best resizer available.

NixfilmsMedia ,

Great Tool, But Buggy

Great tool, really easy to use, but sometimes the render gets stuck on the wheel and won’t let me export/save the changes. Overall, nice tool to use and has been very helpful. Hopefully they’ll fix this bug soon.

risen69 ,

Love the new look

I have always used this easy to use app. I love the new updated look. It feels a little more official now.


XiuXia Yang
2.8 MB
OS X 10.6 or later
Age Rating
Rated 4+
© EffectMatrix Inc.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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