Using IrfanView To Resize an Image


Let’s talk about using IrfanView to resize an image. IrfanView has been around for a long time now. It’s always been a pretty nifty tool for windows users. You can use it to give your pics some glam and even crop images like a pro.

In this IrfanView tutorial, we are going to cover the basic elements of using this software to secure great images.. Using IrfanView to resize an image is not as hard as you might think. Follow this handy tutorial for a step-by-step guide to resizing  and creating beautiful quality images.

Tutorial – Resizing an Image Using IrfanView

First of all, let’s get acquainted with the IrfanView UI.

User Interface

Wallpaper for testing is from

It is quite simple as you can see. From the status bar you can see the resolution of the current image. At the top of the screen you can see the menu bar and the toolbar. The layout and the UI of this application is similar to standard Windows applications.

Now that we are acquainted with the UI, let’s get on with the rest of the IrfanView tutorial. Hereon, you’ll be able to understand the essential steps of using IrfanView to resize an image.

Click on the Image (1) menu then click on Resize/Resample (2). Alternatively, you can press Ctrl + R.


Once you have followed this you will get a separate window to handle the resize and resample features as below.

This may look like it has lot of features and lot of technical stuff, but let’s walk you through it. I’ve highlighted important areas for you to look at. Let’s go through them.

Steps to resizing an image using IrfanView:

  1. This area shows the current size of the image (or original size) and the new target size of the image.
  2. Set new size allows you to specify the size in pixels, centimeters or inches. If you want to use this method simply select the radio button on the box. (Radio button is the white circle, if selected it will show a black circle inside it).
  3. This allows you to specify a percentage of the size of the original as the resize target.
  4. Preserve aspect ratio resizes the image while keeping the aspect ratio of the original image. Example: If the original image’s width to height ratio is 16:9 resulting image will also have ratio as 16:9.
  5. You can also pick some standard sizes for the image to be resized.
  6. Half, double and swap sides allow you to quickly apply changes to the “new-size”.
  7. Size method plays a huge role when using IrfanView to resize an image. If you want higher quality go for a resample filter. This is very important if you are making the image bigger instead of smaller. If you are reducing the size of the image while preserving aspect ratio, quality of the image will remain same most of the time. You can use the options “Apply sharpen after Resample” and “Try to improve gamma for Resample” to improve the quality of a resampled image.
  8. Press the OK button to continue after you have chosen a new size.

If you simply want to make the image half the size of the original you can click the Half button (Box 6) and then press OK.

Resize an Image to half the size

With every new size setting method selected you will change the “New size” accordingly.

Image Resolution

You can now see the resolution change in the main window statusbar. Like we said, resizing an image using IrfanView is pretty easy. Now all you need to do is to save the image.

Save as button

Simply click on the “Save As” button to continue saving the image. For this IrfanView tutorial exercise, I’m going to save my Image as a JPEG image.

Save options

Arrgh, options again. Don’t worry, we’ve got you covered. You’re just a few steps away from using IrfanView to resize an image like a pro.. This window you’re looking at is similar to standard save window. First of all, navigate to the location you desire. For this case, it is the desktop. See below for explanation.

  1. Type the filename here.
  2. Select file type. I am using JPEG for this exercise. You may choose any file type you desire however then the save options will be different.
  3. Quality of the JPEG image. Please note that higher the quality higher the file size.
  4. Click this option if you want a quality similar to original image. (Please note that it is not possible to increase the quality of an image).
  5. This option allows you to set the file size of the image. This is very useful if you want to show a large image on a website or a blog.
  6. Click “Save” after you completed the options.

I’ve put the options you can see in the Image above. Now you just need to click save and it’s done. You’ll see you’ve succeeded in resizing an image using IrfanView. Great work! Do leave a comment below if you have any questions.

Did you like this IrfanView tutorial? See our guide on how to crop an image using IrfanView for perfectly cropped images!

While you’re here, go ahead and check out our other programming tutorials. We have tutorials on Python, Java, JavaScript and other tips and tricks you’ll love!

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