7 Ways to Convert PNG to JPG on Mac (Bath, Lossless)

2020-01-13 02:37:56 / 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 several feasible workarounds as following. Each of them has its advantages. Keep reading to find your favorite.

Best Way 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 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.


Convert PNG to JPG on Mac Free (3Ways)

To convert PNG to JPG on Mac free, a Mac is sufficient. As you may have noticed that, macOS preinstalls several free applications to open and manage images, including Preview, Terminal and Automator. These 3 tools will enable you to convert PNG to JPG on Mac for free.

#1 How to Convert PNG to JPG on Mac Free with 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.

Preview is one of the best free ways to change PNG to JPG on Mac, especially when you are doing single-image conversion.

Steps to Convert PNG to JPG with Mac Preview

  • Step 1. Open a PNG file with Preview.
  • Step 2. From the toolbar at the top of the screen, select File > Export. Choose JPEG from the output format menu. To convert PNG to JPG almost without losing 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.


  • No batch conversion;
  • File size may get relatively bigger;

#2 How to Convert PNG to JPG on Mac Using Terminal Command Line?

Also, if you are a programming lover, you can convert PNG to JPG on Mac with command line. Mac users can use Terminal and sips to achieve this.

Steps to 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 the PNG file that need to be converted.
  • Step 3. Use this command string syntax:
    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 png to jpg mac with command line

This is for single-image conversion. If you want to convert batch PNGs to JPG, the sips command syntax should be as following:

for i in [filename]; do sips -s format [image type] $i --out [destination]/$i.[extension];done


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

#3 How to Convert PNG to JPG on Mac Free with 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.
  • Step 3. Drag all the PNG images you need to convert into the app. Navigate to the search box below the toolbar, input "type of images". Double-click the option Change Types of Images.
  • Step 4. 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.convert PNG images to JPG in Apple Automator
  • Step 5. In the Change Type of Images section, click the To Type dropdown list and choose JPEG.change image format to JPEG
  • Step 6. Click the Run button in the upper right corner of the interface. The process to convert PNG to JPG on Mac will be completed within seconds.

You can use the same app and steps to convert images between BMP, JPEG, JPEG 2000, PNG and TIFF.


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


How to Convert PNG to JPG on Mac 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.


If You Have Installed Adobe

If you have installed and paid for Adobe Acrobat, then use it to convert your PNG files. It’s extremely easy to convert a PNG to JPG in Adobe, but to batch convert PNG to JPG, you need to create an action then batch convert.

Steps to Convert Single PNG to JPG on Mac in Adobe

  1. Open PNG with Adobe;
  2. Go to File>Save As;png to jpg mac adobe 01
  3. Then choose JPEG as the output format;png to jpg mac adobe 02
  4. Tweak the JPEG settings and click OK, your PNG file is converted to JPEG on Mac now.

Steps to Batch Convert PNG to JPG on Mac Adobe

  1. Open one of your PNG files with Adobe Photoshop;
  2. Go to Windows>Actions;batch png to jpg mac adobe 01
  3. Click the following button to start creating action, name the action;batch png to jpg mac adobe 02
  4. Go to File>Save as, choose output as JPEG;
  5. Then go back to the Actions toolbar, click the Stop button to finish recording the action;batch png to jpg mac adobe 03
  6. Now, go to File>Automate>Batch, choose your action name, source folder and destination folder;
  7. Then click OK to start batch converting PNG to JPG on Mac in Adobe Photoshop.


An Easy Trick to Convert PNG to JPG on Mac

Here is another method to convert a PNG to JPG on Mac, which doesn’t require any converter or 3rd party software.

You can directly change the extension from .png to .jpg. Choose the PNG file you wan to convert to JPG, then Rename, and replace the extension .png with .jpg. Finally, click Use.jpg to save the PNG file in JPG format.

rename to convert png to jpg mac

If you want to convert multiples PNGs to JPG, select them all and rename them all.

batch convert png to jpg mac by renaming all

That is quite easy. However, this trick won’t reduce the image size even it is saved in JPG. There is nothing has changed, except the extension. If you want to convert PNG image to JPG in smaller size, try other solutions.


Extended: Can you convert PNG to JPG with transparency?

The fact is that JPG is not among the image formats that support transparency. PNG supports alpha transparency, and JPG does not. After conversion, the transparency background will be filled with white (or black with some PNG to JPG converters). If you need an image with a transparent background, you should stick to PNG format. As you may have noticed, it’s possible to turn JPG into transparent PNG. And it will require use of photo editing software such as Photoshop.


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!

    8 months ago REPLY