How to reduce the size of a JPEG file

How to reduce the size of a JPEG file
By purchasing through the links on this page, you are giving us the opportunity to earn a commission. Your support is greatly appreciated!

Almost everyone who deals with images and computers knows about JPEG image files in today's world. The widespread use of the file format across technological mediums has pushed people to familiarise themselves with it. JPEG image files are also a favourite of websites and online stores like Shopify, thanks to its reasonably small file size.

Sometimes, JPEG files can be larger than expected. They may take up too much space on your storage, make website load speed slow, or you might find attaching several JPEG images to your email impossible because of the size limit. The good news is there are several, simple ways to reduce the file size.

Are you a Shopify store owner? Use TinyIMG app to resize and optimize your images

Install TinyIMG now

Reduce JPEG file size using online tools

A simple google search will reveal a massive number of online image resizers that are both free to use and paid. These online resize software don't require too much knowledge or training to use. Some online image resizers require you to download software to your computer, while some provide an easy "upload to website" feature.

  1. Choose one of the popular online image resizing tools
  2. Drag and drop the JPEGs or select the images that you wish to resize from your computer
  3. Define the new size of the images
  4. Download the reduced JPEG files from the online resizing tool

Along with resizing your files, some programs allow you to crop unwanted portions of the images. These online JPEG file resizing software are also great for resizing JPEG files in bulk.

Reducing JPG file size to optimize your images for the web? Read more on the topic:


How to reduce JPEG file size on Windows

1. Open the JPEG file with a double click or Right-click file > Open With > Photos

open the jpeg image to reduce with windows photos

2. Click the three dots in the top right corner and select Resize

to reduce the jpeg image size choose resize menu in photos

3. Choose the recommended settings or Define custome dimentions to resize the JPEG file manually

set custom dimensions and choose jpeg image quality level

4. Keep the "Maintain aspect ration" option selected and enter new JPEG file width or height. You can also change the level of image quality

after the size and quality are set save the reduced jpeg image

5. Press Save resized copy to save the reduced JPEG file on your PC.

Change a JPEG size using Paint

Here are the steps to resize a JPEG file on a Windows 10, 8 or 7 operating system.

  1. Open the image in Windows Paint. On the bottom of the Paint window, the current dimensions of the image are displayed
  2. Choose the Home tab
  3. Find and choose the Resize and Skew button. The button is right next to the select button on the top left side
  4. A pop-up dialog box will open where you can enter several values. First, enter a new horizontal or vertical value. Remember to leave the "Maintain Aspect Ratio" button selected.
  5. Click OK
  6. On the bottom of the main Paint window, you will see the new resized dimensions of the image
  7. Save the resized JPEG image

Suggested article: How to reduce a PNG file size

How to reduce JPEG file size on Mac

Resizing JPEG files can be done using the Preview application on a Mac.

1. Open Applications > Click and Open the Preview App

screenshot of choice of application on mac computer with preview app

2. Find the file that you want from the pop-up file explorer window

choosing the jpeg file to open in preview app

3. To change the image, click Tools > Adjust Size

selecting adjust size to reduce jpeg image in preview app

4. A pop-up menu with image dimension settings opens up

selecting new reduced jpeg image dimensions in preview app on mac

5. You can choose to proportionately change the height and width of the image by entering either the width or the height value, while the lock icon is closed

6. Changing the image resolution is another way to compress the file size. 72(PPI) is best suited for only digital images. For images that will be printed, the PPI(Pixels Per Inch) has to be higher.

7. Click OK to return to close the pop-up

8. Click File > Save As to save the modified version of the image

How to reduce JPEG file size in Photoshop

Photoshop is one of the best image editing software for simple and advanced image editing tasks. Here is how you can use Photoshop to resize the image.

  1. Open Adobe Photoshop on your computer
  2. Choose File > Open and choose the image you wish to edit
  3. Select Image > Image Size
  4. A dialog box will appear with Pixel Dimensions and Document Size settings
  5. Choose a proportionate width/height with the link button "on"
  6. You can choose to reduce the resolution value or keep it. 300ppi is for print files, and 72ppi is for online/digital files.
  7. You can choose the resampling method options available for the best outcome
  8. The best resampling methods for reducing file size is Bicubic Sharper or Bicubic
  9. Click on OK
  10. Save Image

Reduce JPEG file size by compressing it

Compressing photos and other JPEG files will create much-valued space on your computer. In addition, it makes it easier to email the files or store them on a portable drive. For the web, compression of JPEG files assists in speeding up upload times to social media or your Content Management Systems like WordPress or Shopify.

Online JPEG file compression tools like TinyIMG is works on a simple drag and drop concept to reduce file sizes. Here’s how TinyIMG works:

  1. Go to TinyIMG JPEG compressor on your computer
  2. Simple drag and drop images from your computer into the drop area. You can add up to 10 images at a time to reduce file sizes (3MB max size per image)
  3. TinyIMG tells you the amount of space you have saved after reducing the file sizes
  4. Download the file size reduced JPEGs to your computer, either one at a time or all together

The beauty of online tools like TinyIMG is that it reduces file sizes while maintaining the quality of the image. The best part? You don't have to change the image's dimensions to reduce the file size of an image. And if you’re a proud Shopify store owner, you can even automate your JPEG file size optimization with the TinyIMG app or compress your images manually in the dashboard.

Frequently asked questions

Several websites, apps, and software are available to resize JPEG files. A Google search will reveal the different online tools available, like TinyIMG. Alternatively, you can use your computer and the pre-loaded image editing software like Windows Photos, MS Paint, Mac Preview and others to resize JPEG files. 

Resizing a JPEG file can be done in two ways, you can reduce the overall size of the image by changing the sizing dimensions or compressing it. Doing both will give you the smallest MB file size. 

About the author
Gillian Jane Mercylin
Gillian is a versatile digital specialist who has managed and consulted for innovative businesses, globally. She is a digital design, marketing, advertising and SEO specialist. Yes! She is a cluster of creativeness with unrivaled knowledge and deep rooted understanding in the digital industry. When she writes, she does so with passion to share her knowledge with those who can benefit from it.