Sometimes you may need to convert image from one format to another. For example, certain websites or apps may only accept specific formats; you can convert an image to a different format to optimize the file size, etc. On a Mac, you can convert image formats using various methods.
Method 1. Convert image formats using Preview
Preview is the default image viewer and editor for Mac. Open the image you like to edit in Preview. click on the File menu at the top and select Export from the drop-down menu. The Export dialog box appears. Here, you can choose a location and folder to save the converted image, choose a new format (e.g., JPEG, PNG, TIFF, HEIC) for the image from the Format drop-down menu. Adjust other settings, such as file name, image quality, if needed. Finally hit Save button to save the new image in the specified format to your Mac.
Method 2. Change image file format in Finder
Locate the image file you want to convert in Finder. Right-click (or Control-click) on the image file to open the contextual menu.
In the contextual menu, click the Quick Actions option to open the sub-menu where you should see an option called Convert Image.
The Convert Image dialog box appears. Here you have the options to choose image format options like JPEG, PNG, and HEIF, select image sizes including Actual Size, Large, Medium and Small.
Finally click the “Convert to [format]” button, Finder will automatically create a converted copy of the image file in the selected format in the same directory.