How to Reduce the Size of a JPEG: 5 Different Ways


Have you experienced the frustration of trying to send multiple JPEGs over email, only to get a notification that your attachments are too large?


If you have, then this article is for you. We’ll help you learn how to make a JPEG smaller with several quick and easy options.


1. How to Reduce JPEG Size on Windows

Microsoft Paint is included on any Windows system, so it’s a convenient option for making a JPEG smaller.

The program also offers basic graphic editing tools and the ability to open and save images in most standard formats. Follow the steps below to quickly reduce the size of a JPEG in Microsoft Paint.

First, you’ll need to locate the image you wish to resize. Right-click it once you have, and select Edit. This will open your image in Paint.

Under the Home tab, click Resize.

In the Resize and Skew dialog box, select the Maintain aspect ratio checkbox. This way, the resized image will have the same aspect ratio as the original picture.

If the Maintain aspect ratio checkbox is selected, you only need to enter the Horizontal value (width) or Vertical value (height). The other box in the resize area is updated automatically.

After completing the steps listed above, you can select if you wish to reduce your image by Percentage or Pixel.

Enter a percentage or pixel value to reduce the width in the Horizontal box, or enter a percentage or pixel value to reduce the height in the Vertical box.

Click OK once you’ve done all of the above.

After choosing OK, select File > Save As. Then, choose a file format for your image.

Enter a name for your file and select Save.

2. How to Reduce JPEG Size on a Mac

Every Mac with OS X or newer has a version of Preview installed on it. Preview is an image and PDF viewer that can print images and PDF files, and also edit these image formats.

It’s a quick and easy way to reduce the size of a JPEG. Follow the steps below to resize your image using Preview.

Open the image in Preview by launching Preview in the Applications folder. Alternatively, you can select Ctrl while clicking the image, and then choose Open > Preview.

Under the Tools option on the menu bar, choose Adjust Size.

In the Image Dimensions popup window, select if you want the adjustments to be done by Percent or Size. Adjust the width/height, and resolution. When you change these values, the Resulting Size section will tell you exactly how large your new file will be.

By clicking OK, you’ll be able to see how the resized image looks.

Select File > Save As to create a new copy of your JPEG. Enter a filename for your image and click Save.

3. How to Reduce JPEG Size on iOS

The Image Size app on iOS allows you to reduce a JPEG size to whatever size you require. You can specify the output format using pixels, millimeters, centimeters, or inches. It also lets you preserve the aspect ratio of your image if needed.

This app gives you the option of saving, emailing, printing, or sharing the final image. Follow the steps below to get started resizing photos on your iOS device.

Download: Image Size for iOS (Free, in-app purchases available)

  1. Download and install the Image Size app on your device.
  2. Open an image using the Gallery icon, or take a photo using the Camera icon.
  3. Select Choose to confirm your image choice.
  4. Enter your desired output size into the Width and Height boxes.
  5. If you wish to maintain your aspect ratio, select the Chain found between Width and Height. You can also change your units of measurement to match your requirements. Below the image, you will see the original size versus the new size of the image.

Once you have the correct image size, you can select if you wish to Save, Print, Send, or Share your image.

If you don’t like Image Size for any reason, here are more free photo editing apps for iPhone you could try.

4. How to Reduce JPEG Size on Android

If you want to compress JPEGs quickly on your Android device, Photo & Picture Resizer is a great choice.

This app allows you to easily reduce JPEG file sizes without losing quality. You don’t have to manually save resized pictures, because they are automatically saved in a separate folder for you.

Download: Photo & Picture Resizer for Android (Free, in-app purchases available)

  1. Download and install the Photo & Picture Resizer app on your device.
  2. Open an image using the Select photos button, or snap a picture using the Take a photo button.
  3. Select one or more images you wish to resize.
  4. Select one of the dimension options in the Select dimensions window. You can select the Custom option, however, it is recommended that you select one of the recommended dimension adjustments.

Your newly resized images are automatically saved to your Pictures/PhotoResizer folder. You can now select if you wish to email your image or share it on one of many online platforms.

If you don’t find this app sufficient for your needs, check out these other Android apps for reducing image size.

5. How to Reduce JPEG Size Online

Shutterstock’s free image resizer is one of many websites that will help you reduce the size of your JPEGs quickly. The best part is, you can easily access it from your browser. Follow the steps below to resize your images in seconds.

Open the Shutterstock Image Resizer. After doing that, upload your image—or drag and drop it into the Step One box.

Select the image size you prefer. You can use the preset sizes or provide custom dimensions.

Click on Download to save the file to your computer.

Image Resizing Made Easy

Now, you have several quick and easy ways to resize your images for emailing or uploading, regardless of your platform or device.

Each one of these methods has its advantages, depending on your workflow and the platforms you use. Pick the one that works for you, and start sharing those images!


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