Now that every phone has an incredible camera on the back of it, it's never been easier to take high-quality photos. And if you're like me, that means you take pictures of everything from pets to friends. And there's a good chance you even have a picture of what you had for brunch last weekend. So what do you do with these thousands of photos you have when you run out of storage space on your Mac? Well, you can compress them.
This article will explain how image compression works and give you step-by-step instructions to do it yourself.
Upload your file to the image compressor. It can be an image, document or even a video. Select an image format from the drop-down list. For compression, we offer PNG and JPG. ImageOptim can apply lossy compression not only to JPEG, but SVG, anim GIF and PNG as well! Paste a Base64 Data URI from your clipboard into this website. You can do this also on the image processing page. Paste image data Paste an image from your clipboard into this website. You can do this also on the image processing page. Use this Photoshop JSX-Script Use the script to send an image from Photoshop to compress-or-die. JPEG algorithm is capable of compressing the image as lossy and lossless. The most widely used JPEG received in digital photography and picture archiving and communication via the Internet. JPEG compression is not suitable for drawings, text and iconic graphics. Compress JPG Click to choose a file or drag it here Compress JPGs online here for free When you scan the documents to send them via email or upload to the website, the file size can be very big for that.
What is compression and how does it work?
You might be wondering what it means to compress your pictures or why you'd want to do it in the first place. It's no secret that pictures can get pretty large in file size. And depending on what it is, you might not need or want the highest quality of a photo. Compressing the image strips some of the picture's data and, in turn, makes the file size smaller. Ultimately, freeing up more space on your computer.
Is it possible to compress images without visible quality loss?
When it comes to photo compression, there are two types: lossless and lossy. As its name implies, lossless compression is able to shrink the file size without losing any quality. Conversely, lossy compression will usually result in a bit of photo loss.
If your images are taking up too much space before you start compressing them, you could clean up the duplicate and similar pictures on your computer. An app like Gemini 2 will scan your computer and help you eliminate these images you don't really want anymore.
How to compress images with Mac Preview app
Fortunately, there's a feature in the default macOS app, Preview, that will allow you to compress your images. Follow these steps to see how to reduce photo size on Mac using Preview:
- Open the Preview app.
- A pop-up window should appear if it doesn't click File > Open.
- Select the image you want to compress.
- Then, click Tools > Adjust Size.
- Adjust the Width and/or Height by pixel. You'll see an estimate of the new size in the Resulting Size window.
- Click Ok.
If the picture looks smaller, don't worry, it's probably just zoomed out. Click View > Actual Size, and it should appear bigger again.
You can also use this method if you want to compress multiple pictures at the same time. Before step 4, make sure you click on one of the thumbnails in the sidebar and then press Command+A on your keyboard to select all. Then, when you make your size adjustment, Preview will apply it to all of the images.
How to compress images with online tools
Compress Jpg Mac
Of course, if Preview isn't getting your pictures small enough, there are a handful of online image compressors. Below you'll read about how to use the top three.
1. Compressor.io
The nice thing about Compressor.io is that right off the bat you can choose whether you want a lossy or lossless compression. But you only get 50 compressions per day, and each file you upload has to be under 10 MB.
Using Compressor.io couldn't be any easier. Just follow these steps to compress your pictures.
- In your browser, go to Compressor.io.
- Drag and drop an image file from your computer.
- After it finishes compressing, click Download.
You can also see how much your photo has been compressed by clicking the Compare button.
2. TinyJPG
Another great online compression tool is TinyJPG. You can compress up to 20 jpegs or pngs at once, as long as they're all under 5 MB and there's no daily limit. If you pay to upgrade to their pro tier, you can compress as many files as you'd like simultaneously, and the file size limit goes up to 75 MB.
Follow these instructions to learn how to compress a jpeg on Mac using TinyJPG:
- Open your browser and go to TinyJPG.com.
- Drag and drop the image(s) you want to compress.
- It will automatically start compressing. Click Download to save your new file.
3. Optimizilla
Like the other two tools, Optimizilla is an online image compressor. Where Optimizilla beats out the others is there is no file size or daily compression limits. But, you still can only compress 20 images at one time.
After you upload your picture to Optimizilla, it will compress the image to retain 90% of the quality by default. If you decide you want the file to be smaller, you can adjust the quality until you get the perfect balance of image quality and file size.
To compress your pictures using Optimizilla:
- Go to Optimizilla.com in your browser.
- Click Upload Files and select your images.
- You'll be able to preview the compressed file and adjust it. If you're happy with it, click Download.
Nothing beats cleaning up your photo library and removing all of your duplicate and similar pictures, just wasting precious hard drive space. But if you just can't bring yourself to delete any of your pictures, compressing them is a great alternative to freeing up storage. Hopefully, this article has demystified the process of how to reduce an image's file size on Mac.
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.
Compress PNGPart 1: Easiest Way to Compress PNG
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.
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.
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.
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
Image Compressor Mac
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. 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.
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.
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.
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
Image Compressor Mac
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. 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.
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.
