XnConvert

XnConvert is an image conversion tool that you can use to change your photographs from one format to another in an accessible, intuitive way.

The program supports more than 500 different formats, including popular options like JPG, PNG, TIFF, GIF, and RAW.

Before converting your images, you can choose to apply a series of masks to add watermarks, signatures, special effects, and more. These can be applied to individual images, or to large groups of images in batch mode.

XnConvert is a great option if you're looking for an image converter. Thanks to its accessible interface and wide range of features, you'll be able to easily switch the format of your favorite photographs.