XnConvert is a free, cross-platform, batch image converter that makes light work of converting and editing large numbers of image files in one fell swoop. With support for more than 400 image formats, and versions available for Windows, Mac and Linux, this is one of the most flexible and powerful tools available for everyday image processing.

Images can be added to the program using drag and drop or by opting to add files individually or as complete folders from within the app interface. Using the simple wizard-style interface you can then select from a large number of tools that can be applied to your images. This includes basic settings such as resizing and cropping, but you also have the option of applying special filters such as sepia or mosaic effects.

Each effect and filter can be precisely configured to suit your needs and a preview window help you to ensure that everything looks as it should. You can apply as many or as few options as you need, so if you’re looking to simply resize a folder full of images, this can be done as easily as applying special effects.

XnConvert can also be used to convert images between formats – just select the format you would like to use on the Output tab of the program. Images can be automatically renamed by pulling Exif information from files, and you can also opt to add information such as the date to your filenames. The power of XnConvert has to be experienced to be fully appreciated. If you work with images, this is an essential tool.