Dec 14, 2020 @ 12:13 am

How to change Screenshot Format from PNG to JPEG on Mac?

PNG is a high-resolution file format. It is the best file format to capture the finest quality pictures. It is excellent for storing the images, which contains text. The only problem with PNG file format is that it takes a lot of system’s space. And that’s you should consider changing the default screenshot’s format from PNG to JPEG/JPG on Mac.

In this how-to guide, we have discussed the methods of changing the default file format of screenshot images from PNG to JPEG/JPG. But first, let us describe why you should do so.

Why Change the Default Screenshot Format from PNG to JPEG in Mac?

  1. To Save System Space

In the case of screenshots, we hardly need the images to be saved in this format. But the default mode, in which, screenshots get stored on your Mac Book after capturing them is PNG. It keeps files saved in high resolution (therefore takes a lot of space on hard drive) which allows us to enlarge the images without losing pixels.

  1. For Sharing on the Internet

To share the screenshots on social media or publish it on a website, the file format is supposed to be JPEG. It decreases the picture’s resolution, occupies less space than PNG and takes less time to load on devices.

Note:- Converting a picture from PNG to JPG/JPEG may degrade its quality due to compression.

How to change screenshot format from PNG to JPEG on Mac?

change default PNG to JPEG or JPG

The solution to above problems is – Convert the default file format of screenshot from PNG to JPG/JPEG so that you do not have to convert the file. Here is how:

Method 1

Using Terminal


1. Open the terminal in your MacBook or iMac.

2. Press Shift-⌘-A to open the Applications folder.

3. Enter to the sub-folder of Utilities and open Terminal.

4. Type this command in the terminal window:

defaults write type jpg;killall SystemUIServer

5. Run this command.

Your settings are saved. To check if it is working or not, try to capture a screenshot on your mac using Command + Shift + 3, you will find the file format shifted into JPEG rather than PNG.

This is the simplest way to turn a file from PNG to JPEG.

Method 2

Using Apple’s Preview Program in OS X

There is one more way, using which, you can convert image formatting using Apple’s Preview program in OS X. It’s a built-in option provided by Apple to carry out these types of conversions. Instead of changing the file format of all files, being created, it will change the file format of your saved screenshots. Let’s see how it works.

A. To convert a single image

To export an image from one format to other, Preview is in-build Apple’s support/utility system. You can use this for viewing PDF files and images.

1. Open image using “Preview”

2. Reach File Menu and Choose “Export Selected Images.”

export selected images

3. Click on the drop-down menu and opt the desired Format

4. Name the file, and locate it on desired location and press“Save”

These are the following file formats including PNG (default selection), TIFF, PDF, OpenEXR, JPEG-2000, and JPEG; the selection menu icon in preview offers. To go on for extensive changes, you have GIF, Microsoft ICON, and BMP, Photoshop, ICNS, TGA and SGI options that could be done by pressing “Option” key in the menu.

B. Batch Conversion

Batch Conversion

Converting images one by one can be bothersome. You can also do Batch-image conversion i.e. converting multiple images or files at a time rather than one or two. For this, you need to carry out the following steps.

  1. Select your file in “Finder” and right click on it.
  2. Click on the Open with > to open all the files in Preview.
  3. You can also select and drag the required files.
  4. Click on the list and to select press “Command-A” or go to Edit > Select All.
  5. Now make your choice, press “Convert”. You can edit the list, as per your requirement and press “save” to save. Or to “Resize”, click on “Tools” and then on “Adjust Size”.

It may take some time as per the size of your images. Using this, you can not only make batch conversion but also can resize image accordingly without many efforts.

C. Using Automator

Using Automator

You can also do this batch conversion using a built-in utility named “Automator”. It doesn’t involve coding and is easy to use. It functions faster than the preview.

  1. Open application > Automator
  2. A dialog box will appear to click on “New Document” in it.
  3. Choose “Application” type for your document.
  4. There appear two sections Actions and Variable on left and Workflow on right, you need to drag them to workflow,
  5. Let Automator create a “folder” to set up the converted file. Use “actions” in the workflow
  6. Click on Files & Folders in Library placed on the left side. After this, the screen will appear with a “New Folder” section drag it to workflow.
  7. Type Name and Where i.e. location for it.
  8. Click and drag “Get Folder Contents”.
  9. Select “Photos” and drag “Change Type Of Image”
  10. Click on “Copy Finder Items” and select “Don’t Add”
  11. “Change Type of Images” into the required format.

D. Conversion using third-party applications

You may find a multiplicity of applications available for conversion, but no would clarify if they would provide a satisfactory result. Relying on these apps may disappoint you, check rating and recommendations before downloading. There are applications which apply charges for each convert.
If you want to convert files without losing its quality you can use third-party applications like Xnconvert Software from its official site.

Download Xnconvert to convert images

This application is reliable and free of cost that has been tested before recommending and moreover, it will keep the quality of your images intact.

How to change file format in Mac using Xnconvert Software in a batch mode?

It offers 70 different modes of conversion and is compatible with multiple image formats.

1. Download and install the software in your system.

2. Add images and files by dragging them into the software.

3. Select images that you want to select.

4. Enter the “Output” tab.

5. Select the desired file format i.e.JPG-JPEG photo format.

6. Click “Settings”.

7. Enter the dimensions of the picture and press “Ok”.

8. Press “Convert” button and using this you can convert all pictures in the desired format.Another way is you can opt for any third party image editor application like Movavi, Pixelmator, Skitch.

Apple’s stock Preview app can do this easily and is reliable enough.We may need these tools many-a-time in order to save space in our systems or to deliver some specific file format.

Hope you liked the article kindly share it on facebook, twitter or google plus