How to Reduce Photo File Size Mac

Joel Mason

Mac, Tutorials

Are you struggling with large photo file sizes on your Mac? Don’t worry, reducing photo file sizes is easier than you might think.

In this guide, we will walk you through the process of reducing photo file size on your Mac using simple yet effective methods. So let’s dive in and learn how to optimize your photos without compromising their quality.

Method 1: Resize Images

If you have large images that are taking up too much space on your Mac, resizing them can significantly reduce their file size. Here’s how you can do it:

  1. Open Preview: Locate the image file on your Mac and right-click on it. From the context menu, select “Open With” and then choose “Preview”.
  2. Select Image Size: Once the image is open in Preview, click on the “Tools” tab in the top menu bar and select “Adjust Size”.

    A new window will appear.

  3. Set Dimensions: In the Adjust Size window, you can manually set the width and height of your image or choose a predefined size from the drop-down menu. Keep in mind that reducing dimensions will decrease file size.
  4. Save Changes: After setting the desired dimensions, click on “OK” to apply the changes. Finally, go to “File” in the top menu bar and select “Save” to save the resized image.

Method 2: Compress Images

If resizing images is not enough, you can further reduce their file size by compressing them using different compression techniques. Here are a few options available for Mac users:

  • JPEGMini: JPEGMini is a powerful tool specifically designed to compress JPEG images without sacrificing quality. You can download and install it directly from their website.
  • ImageOptim: ImageOptim is a free and open-source application that optimizes images by removing unnecessary metadata and reducing the number of colors.

    It supports various image formats like JPEG, PNG, and GIF.

  • TinyPNG: TinyPNG is an online tool that lets you compress both JPEG and PNG images. Simply visit their website, upload your images, and download the compressed versions.

Method 3: Convert to Different File Formats

If your photos are in a format that results in large file sizes, converting them to a more efficient format can significantly reduce their size. Consider the following options:

  • JPEG: JPEG is a widely-used image format known for its excellent compression capabilities. Converting your photos to JPEG can drastically reduce their file size while maintaining reasonable quality.
  • WebP: WebP is a modern image format developed by Google that offers superior compression without noticeable loss in quality. However, keep in mind that not all browsers or applications support WebP.


By following these methods, you can effectively reduce photo file sizes on your Mac without compromising their quality. Whether it’s resizing your images, compressing them using specialized tools, or converting them to more efficient formats, there are several options available to suit your needs. Start optimizing your photo collection today and free up valuable storage space on your Mac!

I hope you found this tutorial helpful! If you have any questions or suggestions, feel free to leave a comment below.

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