How to quickly Resize your images.


“I want to email the pictures I took to my grandma but they are so heavy... What can I do??” - Resize Them!!


Resizing images in Irfanview is a easy and quick.

There are 3 ways to resize an image:

  • custom resizing – you choose the size you'd like

  • standard or automatic resizing

  • Batch resizing (resizing a lot of pictures in one action)


    The 2 first method of resizing are done in the same way:


    A. Find the picture you would like to resize

    B. Click CTRL+R

    C. Before choosing the new image size, make sure the following check boxes are checked:

    -Preserve Aspect Ratio

    -Apply sharpen after Resample

    -DPI: (set to 72)

    -resample (better quality) → Lanczos filter

    D. Now choose the new size. Try some of the options to see which fits you the best. Most common sizes are 800X600 or 800X533 depending whether you're sensor ratio is 2:3 or 3:4.

    E. Not the size you want? No problem! Just hit CTRL+Z and you're back where you started







    The 3rd method is used when you want to resize more then one picture.


    A.Copy all the images you would like to resize into a new folder (check this article for more info)

    B.While viewing one of the images on this folder, press B (batch conversion/rename)

    C.In the following box:




    1)define the “output directory for result files:”

    2)add the images you would like to resize . If it is the whole folder, click “add all”

    3)click on the Advanced button in the “Batch conversion settings”. The following window will open:




    In this window:

    1. Select the RESIZE check box

    2. Make sure the 3 check boxes (Preserve aspect ratio/use Resample/Don't Enlarge smaller) Are checked

    3. set the new size for the images. I recommend selecting the “set one or both sides to:” and then entering the maximum width and height. Let's say we don't want the horizontal images to be more then 800px width and the vertical images to be higher then 650px.

      Do Pay attention – if you will not check the “ Preserve aspect ratio” box, the images might come out unproportional, been both 800px width and 650px high.

    4. I like adding a little bit (not too much) sharpens to the images. (4-10 will do)


    Press OK. This window will close and we'll be back in the first window.

    Press Start and the batching is on his way.


    Do remember to define a new folder for the resized images in order to keep the originals safe!


    Your Turn!