Reduce an image’s file size In the Preview app on your Mac, open the file you want to change. Choose Tools > Adjust Size, then select “Resample image.” Enter a smaller value in the Resolution field. The new size is shown at the bottom.If you want to reduce the size of photos (JPEGs) on your Mac, you can do it with the built-in Preview app. Here you can find the actual steps. Note: This method will help you reduces the size of the entire image. It does NOT crop the image. Go to Applications and launch the Preview app (you may also start it from the dock if Preview is there).

How do I reduce the size of an image on Mac?

How do I reduce an image file size on a Mac? In the Preview app on your Mac, open the file you want to change. Choose Tools > Adjust Size, then select “Resample image.” Enter a smaller value in the Resolution field. The new size is shown at the bottom.

How to reduce the size of a JPEG file?

Thereafter, you can upload the JPG files to any website pretty easily as most websites support JPG image format. To reduce the size of a JPEG file on Mac or Windows, you can try the UniConverter to do the job as it converts the file with lossless compression. The UI is fast and clean, enabling users to perform much-needed image editing quickly.

How to change the size of an image file?

If you need a smaller image file, you create it by exporting the image from Photos at a smaller pixel size or file size. In the export panel click the “v” to the right pf “Photo Hind: JPEG” to reveal the advanced controls and select the image size and quality. Save the file to some folder.

What is the best image format to reduce file size?

Change Image Format to Shrink Image File Size There are two common image formats: JPEG and PNG. Generally speaking, JPEG has a smaller file size with large color palette, while PNG is larger in size since it supports unlimited colors. According to our tests, JPEG and PNG files shrink the most after compression.