How to Resize a JPG File By Making It Smaller or Larger

JPG is the usual format when you take a photo or download an image online. Now you are in a situation where you need to resize a JPG. Not sure how to do it? This write-up will guide you. We will teach you how to resize JPG online, on Windows, or on Mac. By the end, you will be able to resize your photo to the exact size you need, either smaller or bigger.

Part 1: Why It Is Important to Resize JPG

The size of JPG images matters for many reasons. Smaller JPG images load faster on websites and social media, which helps browsing stay smooth. They also save storage space on your device. Large JPG images can be hard to share by email or upload online because many platforms limit file size. Adjusting the size keeps your images clear and easy to use.

Part 2: How to Resize a JPG Image Without Losing Quality Online

1. AVAide Image Compressor

Rest assured that when you resize a JPG image with AVAide Image Compressor, the quality stays the same. Yes, the file size gets smaller, but the image still looks clear. You can compress one JPG or up to 40 images at once. On top of that, it is 100% percent free. You do not need to pay anything to use it.

Step 1Open your browser and access AVAide Image Compressor. No download is needed, so you can start right away.

Step 2Drop a single or multiple JPG images into the importing section. You can add up to 40 images at once and easily batch-resize JPG files. Just make sure each image is under 5 megabytes.

Step 3After adding the images, the process starts on its own. The compression only takes a few seconds. You will see a green Finished label once it is done. Now, look at how much file size was reduced for each image.

Step 4If you are satisfied with the result, click the Download All button. Your resized JPG images will save to your device in one click, ready to use.

2. AVAide Image Upscaler

If AVAide Image Compressor shrinks file size, AVAide Image Upscaler helps you resize a JPG picture by enlarging it with better clarity. It uses AI to upscale the image on its own, so you do not need to adjust anything. Do you need to pay for this? No, AVAide Image Upscaler is completely free and adds no watermark to your image.

Step 1On the same browser, search for AVAide Image Upscaler and open it.

Step 2Select and drop your JPG image into the main interface. Once added, the image is ready for resizing.

Step 3This JPG image resizer will upscale your image to 2× by default. But it does not stop there; you can also choose 4×, 6×, or 8×. The higher the level, the bigger the image size and show more details. Hover your mouse over the preview to compare the original and the output.

Step 4Once you are happy with the result, click the Save button at the lower right, and your enlarged JPG image will be saved to your local folder.

3. iLoveIMG

This JPG resizer works straight in your browser, so you do not need to install anything. You can resize a JPG by setting the width and height in pixels. It also keeps your images in the right shape automatically. You can resize many photos at once and even crop, rotate, compress, or add watermarks if you want.

Step 1Head to the iLoveIMG - Resize JPG website using your browser.

Step 2Click the Select Image button or drop your JPG into the page.

Step 3It is time to enter the Width and Height you want in pixels. By default, the Maintain Aspect Ratio option is on. You can also enable Do Not Enlarge if Smaller to avoid making your image bigger than the original.

Step 4Once you are ready, click Resize IMAGES, and iLoveIMG will resize your JPG and automatically download it for you.

Part 3: How to Resize JPG Pictures on Windows/Mac

1. Paint (Windows)

On Windows, Paint offers an immediate way to change image size, and it is a great tool for learning how to resize a JPG. You open your image, set a new size by percent or pixels, and keep the picture proportional.

Step 1First, right-click your JPG image, choose Open with, and select Paint.

Step 2Next, click the Resize and Skew option on the menu bar. You can also press Ctrl + W to open it immediately.

Step 3Choose Percentage to resize by percent. Make sure the Chain link button is on so the width and height stay in proportion. Enter a number: more than 100 makes the image bigger, less than 100 makes it smaller. You can switch to Pixels if you want an exact size instead.

Step 4Click OK to resize your image. To keep the original, click File > Save As, give the new file a name, and save it.

2. Preview (Mac)

Mac users can use Preview to resize images easily. All you need to do is change the size menu and pick pixels or percent. You can also scale it proportionally so it does not get stretched. Plus, it keeps your image clear, which is handy for sharing online. Refer to the steps below to learn how to resize the JPG image below:

Step 1Find the JPG image in Finder, then right-click it and choose Open With > Preview.

Step 2Press Tools in the menu bar and choose Adjust Size. It opens the settings where you can change the image size.

Step 3Change the measurement to Pixels or Percent for easier resizing. Make sure Scale proportionally is checked so your image keeps the right shape. If you want to reduce the file size, check Resample image and adjust the Resolution.

Step 4Finally, click File > Save As to save a new copy. This way, your original photo stays safe, and you now have a resized version ready to use.

Part 4: How to Resize a JPG Using Photoshop

For more control, you can resize a JPG image without losing quality using Photoshop. You can set exact width or height in pixels, inches, or centimeters. The resample option adjusts the pixel count, keeping clarity high.

Step 1Run Photoshop, go to File > Open, and select the JPG you want to resize.

Step 2Click Image > Image Size from the top menu. It opens the panel where you can change the image size.

Step 3Make sure the Link button between width and height is active so your image stays proportional. Change the units to Pixels for web or Inches/Cm for print, then type in the new width or height. Also, please keep Resample checked so Photoshop changes the pixel count correctly.

Step 4Press OK to apply the changes. Then go to File > Save As to save a new copy, keeping your original file safe.

Part 5: Pro Tips When Resizing JPG

JPG images are easy to resize, but a few tips can make them look even better. First, always keep the aspect ratio so your pictures do not get stretched or squished. Second, choose the right size for the platform you use, like smaller for social media and bigger for printing. Third, save a copy of the original before resizing it in case you need it later. Lastly, use trusted tools that keep the image clear and sharp.

By Jane Pineda on Mar 10, 2026