A Guide To Changing Image Size On Mac

Large-size images consume a lot of memory. Initially, it’s just a few photos, but gradually their number increases, and the storage space decreases, affecting your mac’s speed. So, here’s a trick that can help you overcome this problem.

Mac offers an in-built tool for altering image size. The preview app lets you decrease the image size as well as PDF size without the need for any third-party app. Let us learn to do so.

Changing the image resolution

Image resolution is its details. The value that you read in pixels is the photo resolution. Whenever you find yourself in a situation where there is a cap on the photo size, the first trick is to reduce photo resolution.

The preview tool offers you multiple features such as resize, crop and edit. Following is a step-by-step guide to change photo resolution via the preview app.

Locate the image and open it with the preview app
Next, right-click on the edit option, present in the middle of the toolbar
A set of sub-option will open. Select the resize button from the set, the icon with multiple boxes
After clicking on the resize button, a pop-up box is seen on the screen that illustrates image dimensions
Select the pixel option from the box and reduce the width to 50%
Check the image size now
If the final value is within your size criteria, proceed with the ok button

Although the preview app is designed to save images automatically after changes, you can do it manually by using command+s. Close the app by clicking on the close option from the toolbar or using command+q from the keyboard.

Changing the image quality

This option is helpful in cases where you do not want to resize but still need to reduce the size of the file.
The versatile preview app lets you change image quality via simple steps. Check the details mentioned below.

Firstly, open the image via the preview app
Right-click on the file option, located at the top
A drag-down list of sub-features opens up. Select the export option from the list and choose the JPEG format
Next, a quality slider will be seen on the screen. Drag that to the lowest end and simultaneously check the file size. You can slide it as per your choice and stop whenever your image quality criteria are satisfied.
Save the image.

The only feature that the preview app lacks is that it does not support the PNG format. But, no worries, we have a solution for that also.

Compress image size in PNG format

We suggest using the TinyPNG website; it’s an amazing tool for reducing the file size without compromising its quality. It uses its intelligent, trained models to compress image size in just two steps.

Visit the TinyPNG website
Upload the image from the device on the central upload area or drag it there
Click on the biggest icon visible on the screen
It’s done. Download your image as an individual photo or a ZIP file and then extract the final image with reduced size.