How to Increase Image Size in KB to MB without Damaging Quality

"Can anybody tell if and how I can increase a photo size from KB to MB?" Although it is a tricky question, yes you can change photo file size. The new problem is that the image will become pixelated and lose quality. Most photo enlarger can only make your file size double. Fortunately, this article identifies three easy ways to do the job on PC and Mac. Moreover, all of them are free to use on your computer or online.

Increase Image Size in KB to MB

Part 1: Easiest Way to Increase Photo in MB Online

As mentioned previously, it is difficult to increase image size in KB to MB without losing quality. Fortunately, Aiseesoft Image Upscaler can meet your demand. As a web app, it lets you do the job easily. Moreover, it relies on advanced technology to keep the photo quality as much as possible.

How to Increase Photo in MB Online

Step 1:
Open the home page,, in your browser. Click on the Upload Photo button and upload the photo that you want to edit. There is no requirement of registration or payment. Moreover, it supports PNG, JPG, BMP, TIFF, etc.
Upload Photo
Step 2:
Set Magnification to 2x, 4x, 6x or 8x until you get the desired result. The image size can be found under each picture in the preview panel. Moreover, you can switch between the preview mode or comparison mode.
Step 3:
Click the Save button once you increase the photo in KB to MB. The result will go to the download folder of your browser. Or you can click the New Image button to begin processing another photo.

Part 2: How to Increase Image Size to MB on PC

The MS Paint is the built-in photo editor on Windows 10/8/7 and earlier. It allows you to increase image size in MB without third-party apps.

Step 1:
Open a file explorer window, and find the photo you wish to edit. Right-click on it, select Open with and choose Paint. Then it will be opened in MS Paint.
Open Paint
Step 2:
Click the Resize option in the Image panel on the menu bar. The Resize and Skew dialog will show up.
Step 3:
Check the box next to Maintain aspect ratio in Resize section, select Pixels and increase the Horizontal or Vertical based on your need.
Step 4:
Click the OK button to confirm it and you will see the image size at the bottom. If it is large enough, go to the File menu and save the photo. If not, you can resize it again.

Part 3: How to Increase Image Size to MB on Mac

The Preview app is the preinstalled photo editor on Mac. From this point, it is the counterpart of MS Paint from Apple. Of course, you can use it to increase image size in KB to MB.

Step 1:
Open the Finder app, find the photo to resize and double-click on it. It will be opened in Preview app if you did not change the default photo editor.
Step 2:
Go to the Tools menu from the top menu bar and choose Adjust Size. That will activate the resize dialog.
Adjust Size
Step 3:
Check the box next to Scale proportionally if you want to keep the aspect ratio. Then upscale the Width or Height option and the other will modify accordingly.
Step 4:
Check the image size in the Resulting Size section and click OK button as long as it reaches to MB.

Part 4: FAQs about Increasing Image Size in MB

Is a KB smaller than MB?

Both KB and MB are used to measure the digital file size. A KB is equal to 1000 bytes, while a MB is a multiple of the unite byte for digital information with prefix mega. A MB is equal to 1000 KB.

How to convert an image in KB to MB?

Most photo editors with the resize feature are able to convert the images in KB to MB.

Is 1 KB a lot of data?

A KB is equal to 1000 bytes or 0.001 MB. The Kilobyte is slightly bigger than the byte but it is still a small unit for the measurement of digital file size.


Now, you should learn at least three ways to increase an image in KB to MB online or on desktop. It cannot be denied that the built-in photo editors are easy ways to do the job. However, the output quality is not very great. Aiseesoft Image Upscaler, on the other hand, can provide the best output quality. More questions? Please feel free to write down below.

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