PNG, stands for Portable Network Graphics, is a commonly used image format. Though it is a lossless file format, it does compress visual content. However, PNG image files always come with larger file size. In order to save storage space or publish online quickly, you might need to compress PNG image files regularly. Therefore, this article expects to introduce four ways to help you compress PNG image files on Windows, Mac OS X and Linux. Some of them even can compress images by 70% without blurring.

1. How To Compress Video Files
2. Compress Files Apple Mac

Part 1: Easiest Way to Compress PNG

How To Compress Video Files

How to unzip files on mac computers. Unzipping a file on a mac computer is user-friendly and intuitive. To unzip files on a mac, simply follow the steps below: Double click the zipped file. The file will automatically be decompressed by Archive Utility into the same folder the compressed file is in.

If you do not like to install software to your computer, Apeaksoft Free Online Image Compressor is the best option to compress PNG online. It is not only easy to use, but also able to shrink images from MB to KB without losing quality.

1. Compress PNG images online while preserving transparency. Oticon app for mac.

2. Batch handle up to 40 images without quality loss.

3. Improve the performance using advanced technology.

4. Available to all machines running Windows, Mac OS X and Linux.

In a word, Free Online Image Compressor is the easiest way to compress PNG image file size.

How to Compress PNG Online

Step 1Open your web browser, copy and paste https://www.apeaksoft.com/free-online-image-compressor/ into the address bar, and hit the Enter key to access the online PNG compressor.

Step 2Hit the Add Images button on the page to activate the open-file dialog. Then find the PNG files that you want to compress, select them and click Open to upload them. Or you can drag and drop these PNG images into the web page directly.

Step 3After uploading, the online PNG compressor will do the job automatically. When it is done, you will see the Download button. Here you can download each compressed image separately or get all files in one package by hitting the Download All button.

How to remove apps from a mac computer. You must be signed in as an administrator on the Mac or provide an administrator name and password to complete these steps.

Part 2: Compress PNG Image on Windows

If you prefer to compressing a PNG image manually on PC, the built-in Paint program is a simple choice. With Paint, you can crop your PNG image to decrease the file size or resize the dimension. Moreover, converting PNG to JPG can compress the original image further.

Step 1 Locate the PNG image that you wish to compress to JPG. Right click on the file, select Open with and choose Paint to open it in Windows Paint.

Step 2 Firstly, use the Select tool on the top toolbar. Drag the box to cover the portion to leave, and then press the Crop tool to cut the image.

Step 3 Next, select the Resize tool to open the resize dialog. Choose Pixels, and set smaller values in Horizontal and Vertical boxes. Click OK to confirm it.

Step 4 Finally, click the File menu, select Save as and choose JPEG picture. On the popup dialog, navigate to a specific directory to save the output, drop a name and save the compressed PNG to your computer.

PowerPoint is also the tool to help to compress the images on Windows computer.

Part 3: Compress PNG Image on Mac

When it comes to compress PNG image on Mac OS X, you have less options than doing it on PCs. There are several image editors offer the Mac version, such a Photoshop. It allows you to resize a PNG image and compress it.

Step 1 Run your Photoshop and drag the PNG image into the program.

Step 2 Click and expand the Image menu and select Image size to open the Image Size dialog. Adjust Width and Height to a smaller size to compress PNG. Check Resample and select Bicubic Sharper, which preserve the sharpness while compress an image.

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Step 3 Hit OK button to close the Image Size dialog. If you want to compress PNG image without losing quality, export the image directly. Otherwise, you can compress PNG to JPG to shrink the file size.

More solutions to resize a photo on Mac, you can check it here.

Part 4: Compress PNG on Linux

Although you can compress PNG images while preserving transparency using TinyPNG and other web apps on Linux, command lines are still the prevalent method. We use Pngquant as the example to show you the procedure.

Step 1 Install the PNG compressor by executing the command line $ sudo apt install pngquant.

Step 2 Show the original PNG file size with the command $ du -sh pngimage.png. Replace pngimage.png with the filename of your PNG image.

Step 3 Compress your image with the command $ pngquant pngimage.png. Then the compressed file will be named pngimage-fs8.png.

Step 4 Check the compressed file size with $ du -sh pngimage-fs8.png. You will find the PNG file size becomes much smaller. According to our test, the command line can compress a 152KB PNG image into 48KB.

Part 5. FAQs of Compressing PNG

Question 1: Can PNG images be compressed?

Answer: Yes, PNG images can be compressed. PNG image files are lossless compressed bitmapped images. Even though the PNG images are compressed, the file size can be very large. https://golwizards.netlify.app/free-sftp-app-mac.html. So, you can shrink PNG file size with an image compressor.

Question 2: What's a typical file size for PNG before and after compression?

Answer: The file size of PNG is various depending on the type of image data saved. Generally speaking, an image file saved in PNG is larger than saved in JPG. When it comes to the compressed file size, it is determined by the output format and compression level. Briefly, compressing PNG to JPG and higher compression level can produce smaller file size, but the image quality may be damaged.

Question 3: What is PNG file format used for?

Answer: A PNG file contains a bitmap of indexed colors and uses lossless compression. It is similar to a GIF file, but without copyright limitations. In short, PNG files are commonly used to store graphics for web images.

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Question 4: What are the advantages of PNG?

Answer: To learn the advantages of PNG, we compare it with other popular image formats. Firstly, PNG was originally created as an improved replacement for GIF. PNG cannot store dynamic visual content, but it is much smaller than GIF. Compared JPG, PNG is larger, but it can store transparency layers. If you want to compress PNG while preserving transparency, you should keep the image format. Compressing PNG to JPG will lose the transparency layer. Plus, JPG has a big compressing ration, which reduce the quality of the image. JPG is the better output format for photographs, while PNG is a better option for images storing text, line art and other graphics.

Conclusion

This article told you multiple ways to compress PNG image files on Windows, Mac OS X and Linux. They all have unique advantages and benefits. Apeaksoft Free Online Image Compressor, for example, has the capacity to compress PNG online without asking you to install any software. Plus, as a web app, it is available to all laptop and computer. You can pick up your favorite tool and follow our guide to complete the task. If you have more questions related to PNG compression, please write it down below this article.

Optimized Storage helps you save storage space space by storing your content in iCloud and making it available on demand:

• When storage space is needed, files, photos, movies, email attachments, and other files that you seldom use are stored in iCloud automatically.
• Each file stays right where you last saved it, and downloads when you open it.
• Files that you’ve used recently remain on your Mac, along with optimized versions of your photos.

If you haven't yet upgraded to macOS Sierra or later, learn about other ways to free up storage space.

Find out how much storage is available on your Mac

Choose Apple menu  > About This Mac, then click Storage. Each segment of the bar is an estimate of the storage space used by a category of files. Move your pointer over each segment for more detail.

Click the Manage button to open the Storage Management window, pictured below.

Manage storage on your Mac

The Storage Management window offers recommendations for optimizing your storage. If some recommendations are already turned on, you will see fewer recommendations.

Store in iCloud

Click the Store in iCloud button, then choose from these options:

• Desktop and Documents. Store all files from these two locations in iCloud Drive. When storage space is needed, only the files you recently opened are kept on your Mac, so that you can easily work offline. Files stored only in iCloud show a download icon , which you can double-click to download the original file. Learn more about this feature.
  
• Photos. Store all original, full-resolution photos and videos in iCloud Photos. When storage space is needed, only space-saving (optimized) versions of photos are kept on your Mac. To download the original photo or video, just open it.
  
• Messages. Store all messages and attachments in iCloud. When storage space is needed, only the messages and attachments you recently opened are kept on your Mac. Learn more about Messages in iCloud.

Storing files in iCloud uses the storage space in your iCloud storage plan. If you reach or exceed your iCloud storage limit, you can either buy more iCloud storage or make more iCloud storage available. iCloud storage starts at 50GB for $0.99 (USD) a month, and you can purchase additional storage directly from your Apple device. Learn more about prices in your region.

Optimize Storage

Click the Optimize button to save space by automatically removing watched movies and TV shows. When storage space is needed, movies or TV shows that you purchased from Apple and already watched are removed from your Mac. Click the download icon next to a movie or TV show to download it again.

Your Mac will also save space by keeping only recent email attachments on this Mac when storage space is needed. You can manually download any attachments at any time by opening the email or attachment, or saving the attachment to your Mac.

Optimizing storage for movies, TV shows, and email attachments doesn't require iCloud storage space.

Empty Trash Automatically

Empty Trash Automatically permanently deletes files that have been in the Trash for more than 30 days.

Reduce Clutter

Reduce Clutter helps you identify large files and files you might no longer need. Click the Review Files button, then choose any of the file categories in the sidebar, such as Applications, Documents, Music Creation, or Trash.

You can delete the files in some categories directly from this window. Other categories show the total storage space used by the files in each app. You can then open the app and decide whether to delete files from within it.

Learn how to redownload apps, music, movies, TV shows, and books.

Where to find the settings for each feature

The button for each recommendation in the Storage Management window affects one or more settings in other apps. You can also control those settings directly within each app.

• If you're using macOS Catalina or later, choose Apple menu  > System Preferences, click Apple ID, then select iCloud in the sidebar: Store in iCloud turns on the Optimize Mac Storage setting on the right. To turn off iCloud Drive entirely, deselect iCloud Drive.
• If you're using macOS Mojave or earlier, choose Apple menu > System Preferences, click iCloud, then click Options next to iCloud Drive. Store in iCloud turns on the Desktop & Documents Folders and Optimize Mac Storage settings.
• In Photos, choose Photos > Preferences, then click iCloud. Store in iCloud selects iCloud Photos and Optimize Mac Storage.
• In Messages, choose Messages > Preferences, then click iMessage. Store in iCloud selects Enable Messages in iCloud.

• If you're using macOS Catalina or later, open the Apple TV app, choose TV > Preferences from the menu bar, then click Files. Optimize Storage selects “Automatically delete watched movies and TV shows.”
• In you're using macOS Mojave or earlier, open iTunes, choose iTunes > Preferences from the menu bar, then click Advanced. Optimize Storage selects “Automatically delete watched movies and TV shows.”
• In Mail, choose Mail > Preferences from the menu bar, then click Accounts. In the Account Information section on the right, Optimize Storage sets the Download Attachments menu to either Recent or None.

Empty Trash Automatically: From the Finder, choose Finder > Preferences, then click Advanced. Empty Trash Automatically selects “Remove items from the Trash after 30 days.”

Other ways that macOS helps automatically save space

With macOS Sierra or later, your Mac automatically takes these additional steps to save storage space:

• Detects duplicate downloads in Safari, keeping only the most recent version of the download
• Reminds you to delete used app installers
• Removes old fonts, languages, and dictionaries that aren't being used
• Clears caches, logs, and other unnecessary data when storage space is needed

How to free up storage space manually

Even without using the Optimized Storage features described in this article, you can take other steps to make more storage space available:

• Music, movies, and other media can use a lot of storage space. Learn how to delete music, movies, and TV shows from your device.
• Delete other files that you no longer need by moving them to the Trash, then emptying the Trash. The Downloads folder is good place to look for files that you might no longer need.
• Move files to an external storage device.
• Compress files.
• Delete unneeded email: In the Mail app, choose Mailbox > Erase Junk Mail. If you no longer need the email in your Trash mailbox, choose Mailbox > Erase Deleted Items.

Learn more

Compress Files Apple Mac

• The Storage pane of About This Mac is the best way to determine the amount of storage space available on your Mac. Disk Utility and other apps might show storage categories such as Not Mounted, VM, Recovery, Other Volumes, Free, or Purgeable. Don't rely on these categories to understand how to free up storage space or how much storage space is available for your data.
• When you duplicate a file on an APFS-formatted volume, that file doesn't use additional storage space on the volume. Deleting a duplicate file frees up only the space required by any data you might have added to the duplicate. If you no longer need any copies of the file, you can recover all of the storage space by deleting both the duplicate and the original file.
• If you're using a pro app and Optimize Mac Storage, learn how to make sure that your projects are always on your Mac and able to access their files.