BatchPhotoīatchPhoto is an easy-to-use app to resize images in bulk on Mac. Once you’ve entered the desired values, all that’s left to do is to save your files.īesides resizing, the Preview app lets you perform other optimization-related operations, such as converting to another image format, rotating or flipping groups of images. The app gives you the option to select one of the preset resolutions or to manually type in the preferred size for Width or Height. Now, with all the images selected, go to Tools in the same menu bar and then Adjust Size. In the newly-opened window, go to Edit in the menu bar and Select All. Next select all of them and open them in the Preview app. On the contrary, it can help you improve your photographs in several ways, including to batch resize them.īefore starting, make sure that all your pictures are stored in the same folder. This native program is not a basic photo viewer. The built-in Preview app can be a good place to start if you want to optimize your images. Below we’ve compiled a list of 10 apps that enable you to accomplish your task quickly and effectively. If you want to learn how to resize images on Mac with ease, then this article is definitely for you. Reducing the size of your files will speed up the loading time of your pages, which will make visitors stay longer on your website.Īt the same time this operation will help you free up significant disk space and it will make your photos significantly easier to share with others. Large files will affect in a negative way the loading speed of your pages and hence provide an unpleasant user experience. Resizing photos can be beneficial from multiple perspectives.įirst of all, the size of your images has a direct impact on the performance of your website and blog. Lanczos2 is almost identical to Catrom, and it is also similar to the bicubic option in Photoshop.When it comes to digital photo editing, one of the most important steps of this process revolves around image resizing. I usually use Lanczos2 (2-lobe Lanczos), which makes images less sharp than Lanczos ( Lanczos3 or 3-lobe Lanczos). Triangle is similar to the resizing methods used by Automator and sips. The default filter for downscaling images is Triangle, which often makes images look too blurry without additional sharpening in my opinion. # use a white instead of a black backgroundĬonvert transparent-bg.png -flatten white-bg.jpg # make images smaller or larger and crop them so that they are exactly 200x200 pixels Mogrify -filter lanczos2 -thumbnail 'x500>' -format jpg -quality 93 -path ~/Desktop/ *.png # save thumbnails to ~/Desktop and make images wider than 500 pixels smaller Mogrify -filter lanczos2 -resize '1280x1280>' *.png More examples: # modify images in place and make images larger than 1280x1280 pixels smaller You can install ImageMagick with brew install imagemagick or sudo port install imagemagick and use something like this:įor f in *.png do convert $f -filter lanczos2 -resize 600x -extent 600x200 -quality 75 $jpg done Is that my best option on a Mac? Can I accomplish this more efficiently through another app like Quicksilver? I also can't assign a keyboard shortcut to the whole process. (It can scale specifically to width before cropping height.) It can change to JPG, but it can't specify image quality. I can do it one at a time with some keyboard shortcuts in Photoshop or Pixelmator.Īutomator (using Preview) can scale to 600 pixels on the longest dimension, but it doesn't let me specify width. I can do all that manually, to a batch of files, through Preview. All of the above, plus step a(1): Crop images to 200 pixel height.Scale all the pictures to 600 pixels wide.Hit a button or two (menu item or keyboard shortcut) to do the following:.Select a group of image files in finder. I've been batch-resizing images through Preview (OS X) through the menu bar, but I want a simpler workflow, since I do this a dozen times a day.
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