5 Ways to Batch Convert PNG to JPG on Mac (OS Big Sur Included)

2020-06-11 22:20:22 / Posted by Connie Wisley to PDF Follow @ Connie

In some occasions, we need to convert a PNG to JPG on Mac. For example, users are only allowed to upload JPG files on some platforms or need to render images in smaller file size for space saving. For all users who have similar issues on converting PNG to JPG on Mac, we here introduce 5 feasible workarounds as following. Each of them has its advantages. Keep reading to find your favorite.

How to Batch Convert PNG to JPG on Mac Lossless?

It’s much likely that you just have multiple PNGs to be converted on Mac. In this case, a converter that supports batch conversion and retain original image quality will be helpful. Yes, for sure, Adobe offers the best kits to manage image formats, but we don’t need to cost such huge money on Adobe or other image processors. PDF Converter OCR for Mac will help with an affordable price.

PDF Converter OCR is a feature-rich PDF converter incorporating a PDF converter, an image converter, an OCR converter, and even a PDF creator. In other words, PDF Converter OCR is the tool to perform conversion between different images, convert native PDF/scanned PDF/images into editable formats, create PDF from other documents, and still with original file quality retained.

The main reason why we pick PDF Converter OCR as our favorite lies in its capability to carry out all needed conversion on our files.

Steps to Batch Convert PNG to JPG on Mac Losslessly

Step 1Download PDF Converter OCR to your mac.

Free Download

Step 2Add multiple PNG images to convert

Drag PNG files into the app. You are enabled to batch convert PNG to JPG on Mac and add up to dozens or even hundreds of images.

add PNG images to convert

Step 3Select JPEG as the output format

Once all the PNGs are fully imported, click the format dropdown list and select to Image > JPEG (or any other format you need.)

select JPG as the output format

Step 4Convert PNG to JPG on Mac

Click Convert in the lower right corner of the interface, select a destination location and click Save.

You may hesitate to get such powerful tool around to convert PNG to JPG on Mac. But in light of the growing needs on file conversions in the near future, it will be worthwhile and necessary.


Batch Convert PNG to JPG on Mac with Command Line (Terminal)

If you are a programming lover and one among those who are looking for a solution to batch convert PNG to JPG on Mac with command line, you can use macOS utility tool---Terminal.

Steps to Batch Convert PNG to JPG on Mac with Terminal Command Line

  • Step 1. In Finder, go to Applications > Utilities > Terminal.
  • Step 2. Type “cd”, press the Space Bar, and then drag & drop the PNG folder that need to be converted to Terminal.
    In following interface, /users/lmx/Desktop/02 refers to the location where my PNG files are stored. As you can see, I am going to convert the PNG files in my “02” folder stored on my mac desktop.png to jpg terminal 01
  • Step 3. Press Enter, then input the command line “for i in *.png; do sips -s format jpeg $i --out /Users/lmx/Desktop/02/$i.jpg;done”.
    /Users/lmx/Desktop/02 means I choose to save the JPG output files in the same PNG folder, also, you can choose another location.
    To find the location of a specific folder, just drag and drop the folder to Terminal, it will display the path.png to jpg terminal 02
  • Step 4. Press Enter again, the batch conversion will start;png to jpg terminal 03
  • Step 5. Now go to the output folder, you will find the JPG output files, you may need to rename them.png to jpg terminal 04


  • Not easy to use;
  • May fail to convert, need to repeat the process;
  • File size may get relatively bigger;
  • Need rename the output files;

To convert single PNG to JPG on mac with Terminal Command Line, you can follow the steps:

  • Step 1. In Finder, go to Applications > Utilities > Terminal.
  • Step 2. Type “cd”, press the Space Bar, and then drag & drop the PNG file that need to be converted to Terminal;
  • Step 3. Use this command line: sips -s format [image type] [file name] --out [output file
    If your PNG file is named as “01.png”, the sips syntax should be: sips -s format png 01.png --out 01.jpg


Convert Multiple PNG to JPG with Mac Preview

Converting PNG image to JPG with Mac Preview is a popular choice since the Preview app comes with macOS and is easily accessible. It can be used to view and manage images and PDFs too.

Steps to Batch Convert PNG to JPG with Mac Preview

  • Step 1. Open a PNG file with Preview.
  • Step 2. Then click and choose Thumbnails to show all imported images as thumbnail;png to jpg preview01
  • Step 3. Drag and drop all PNG files to Thumbnail column;png to jpg preview 02
  • Step 4. Then select all PNG files and right click to choose Export As;png to jpg preview 03
  • Step 5. Choose output as JPEG format, click Choose to start the PNG to JPG conversion on mac.png to jpg preview 04


  • Preview crash sometimes when converting multiple files;
  • Output image quality is sacrificed to some extent;

In the case you just want to convert single PNG to JPG on mac with Preview, you can follow the steps:

  • Step 1. Open a PNG file with Preview.
  • Step 2. G to File > Export. Choose JPEG from the output format menu.
    To convert PNG to JPG almost with better quality, slide the Quality bar all the way to Best. convert png to jpg mac with preview
  • Step 3. Click Save. The conversion will be done within a blink of the eye.


Export PNG as JPG with Mac Automator

You can also change image from PNG to JPG on Mac using Apple Automator. It’s free and easy to use. More importantly, batch conversion is possible.

Note: It’s recommended to backup the original PNG first. The conversion action will replace the original picture with the converted one. You may still need the PNG version later.

Steps to Batch Convert PNG to JPG with Mac Automator

  • Step 1. Open Finder and go to Applications. Click Automator.
  • Step 2. In the Choose a type for your document window, select Workflow and click Choose.png to jpg automator
  • Step 3. Go to Files & Folders>Ask for Finder Items, drag and drop the action to the right panel, choose items type as Folders.png to jpg automator 02
  • Step 4. Go to Photos>Change Type of Images, drag and drop the action to the right panel; 
    A message window will show up telling you that the action will change the file type of the original file. Click Don't Add if you have already made a backup, and click Add if a backup is not available.png to jpg automator03
  • Step 5. In the Change Type of Images section, click the To Type dropdown list and choose JPEG.png to jpg automator04
  • Step 6. Click the Run button in the upper right corner of the interface. Then choose the PNG folder you want to convert to JPG, and click Choose to start the PNG to JPG conversion on mac.png to jpg automator 05


  • Not easy to use;
  • File size may get relatively bigger;
  • Program freezes sometimes;


Batch Convert PNG to JPG Online Free

Today, lots of people still flock to free options to make PNG into JPG. It’ s really hard to tell if online PNG to JPG converter can work perfectly for each user. However, it’s worth a try. After all, it is free.

To convert PNG files to JPG online free, you can try image.online-convert. Allowing users to adjust quality settings makes online-convert more appealing than other online PNG to JPG converters. Along with its satisfactory conversion results, this online solution becomes to our top pick.

  • Step 1. Go to online-convert, click Choose File or enter URL. You can choose files from Dropbox and Google Drive to upload PNGs.
  • Step 2. Tweak the quality settings. There are optional settings allowing you to change size, color, DPI, etc.
  • Step 3. Click Convert File to start the PNG to JPG conversion.
  • Step 4. Once the process is done, the JPG output will be become downloadable. Save the file.

online png to jpg conversion

As long as you have access to Internet, you can convert PNG to JPG online anytime anywhere.

However, this online PNG to JPG converter cannot batch convert. Also, you are recommended to give a second thought before deciding to use this online tool, in the case you are working on highly private files.


Above are the common ways on how to convert PNG to JPG on Mac. If you need to convert images and documents on a regular basis, professional software like PDF Converter OCR can be a great choice. For an occasional need of PNG to JPG conversion, you can use the apps that are built in to macOS, say, Preview. Online conversion services are also easy to access and use.

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1 Comments Leave a Reply

  • Hani

    Thank you very much for this post! I was able to use the sips command via terminal and it worked exactly how I wanted to!

    1 years ago REPLY