If you’re using macOS, you might find its built-in screenshot capture tool extremely useful. You can press Command (⌘)-Shift-3 to take a screenshot of your whole screen or Command (⌘)-Shift-4 to take a screenshot of part of your screen.
By default, macOS will save your screenshots as PNG files on your desktop. An advantage of PNG is the better image quality, however, you won’t be able to recognize the difference most of the time, especially when you use the screenshots on the Web. Meanwhile, the PNG files are a lot bigger in size. For instance, I took a screenshot of my desktop, the JPEG file size was just 800KB while the PNG file took more than 4MB.
Read also: Learning Your Way Around Mac Keyboard
Of course, you can open the PNG file and export it to a JPEG file later but it could cause heavier workload when you have to deal with the screenshots regularly. So, the tutorial will show you how to change the image format of your screenshots from PNG to JPEG, or GIF, PDF, TIFF. Just follow the steps below.
How to Change Screenshot File Format on your Mac
1. Open Terminal. You can find it on your Dock, in Applications or in Launchpad
2. Type the line below into your Terminal window, then press Return key
defaults write com.apple.screencapture type jpg; killall SystemUIServer
That command will change the screenshot format to JPG. If you want to change it to other formats, just replace JPG with GIF, PDF, PNG or TIFF.
As I mostly use the screenshots for my blog posts, this tip saves me a lot of time and disk space as well. After that, I also use some other tools like ImageOptim to compress those pictures and make the size even smaller.
In case you want to save the screenshots somewhere else to avoid a cluttered desktop, you can use the following command:
defaults write com.apple.screencapture location ~/Documents/Screenshots; killall SystemUIServer
That’s all for today. Hopefully, the tip will be helpful for you guys.