How to modify images in bulk with IrfanView

Colleague had recently asked how can he reduce size of folder with large images. Archiving won’t work since most image formats are already compressed. Size of image files depends on image dimension, colors and format. So there are plenty ways to make image smaller. Except that it is troublesome to go through every image to tweak that.

IrfanView has native batch module that allows to modify many images at once.

What it does

Batch conversion module can perform many of IrfanView functions on many images in single sweep. It can (but not limited to):

  • crop and resize images;
  • convert them to any of supported image formats;
  • rename (making use of image parameters and data);
  • add text (copyright, watermarks, etc) on images.

Choose task

Module is launched by File > Batch Conversion/Rename… (hotkey B)



In main interface you have to choose:

  • input files and output path for result;
  • task (convert, rename or both).

This is enough to convert format. But there is more. Much more actually.

Set advanced settings

Use Advanced Options allows to access many more functions to apply.



Depending on what you need you can do anything here – from thumbnails to color corrections. In case of my colleague he had reduced image width to 1280px with preserving proportions and converted image to grayscale. This reduced his images from 2MB per to 600KB per.


IrfanView is mostly covered as image viewer, but there are plenty of advanced function you can explore in there. Batch module is very convenient to process multiply images and can be lifesaver to get large collections in order (another lifesaver would be VisiPics).

PS For another bulk image utility check out recent post about Digital Image Tool at ghacks.

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  • Rarst #

    @Dan Thanks for suggestion, bookmarked to check out. :)