How to Convert PNG to JPG on Mac with Best Quality: 7 Easy Ways

2019-08-08 22:44:52 / 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 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.

Why convert PNG to JPG

First thing first, why do people want to convert PNG to JPG on Mac? PNG, with a full name of Portal Network Graphics, is a lossless image compression format. As you may have noticed, when we capture screenshots on Mac or with other programs, the capture are saved in PNG format.

The usage of PNG files is so universal, but why we still need to convert PNG to JPG on Mac? Because JPG is much more universal than PNG and it is the most web-friendly image format to carry information. Also, PNG file is relatively bigger than that of JPG in size due to lossless compression.

The best way to convert PNG to JPG on Mac (in batch)

It’s much likely that you just have multiple PNGs to be converted on Mac. In this case, a converter that supports batch conversion 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.

Step 1Add PNG images to convert

Download and install Cisdem PNG to JPG converter. Launch it. 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 2Select 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 3Start the conversion from PNG to JPG

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.

How to convert PNG to JPG on Mac using 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.

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.

Quite easy. Also, you can utilize Mac Preview to convert PNG to PDF on Mac, even convert PDF to PNG on Mac for your purposes.

As mentioned above, one can only convert one PNG to JPG with Preview per time. If you have multiple PNGs to convert, batch conversion will be better.

How to convert PNG to JPG on Mac using 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.

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

How to Convert PNG to JPG on Mac in 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.

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.

How to convert PNG to JPG on Mac online

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 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.

2 other methods available

#1 Rename

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.

#2 Use Photoshop

It’s extremely easy to convert image format in Photoshop. You can do it individually or in batch. Just open a PNG in Photoshop and then save it as JPG. The batch operation will involve the use of the Actions and Batch process functions. When it comes to conversion quality, you can select high quality level available in the JPEG Options windows.

JPG output settings

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!

    4 months ago REPLY