Nconvert

Nconvert is a lightweight command-line image processing utility that can be used for converting, editing and enhancing multiple pictures at the same time. The application provides support for more than 500 graphic file formats and comes with over 80 image manipulation commands.

Nconvert features an extensive and variate set of tools, designed to help you convert images from one format to another, rotate, crop and resize them, perform fine adjustments or apply filters and effects in order to improve their quality.

One of the advantages of this application is that it is capable of processing image sequences and multiple types of images simultaneously, enabling you to batch convert a collection of pictures to a user-defined format, no matter the extension of each file.

In addition to this, the program can transform images while converting, allowing you to convert, change size and make fine adjustments with a single operation. It provides options for importing images from the clipboard, editing the metadata information and specify the source file name within the output name.

When it comes to graphic editing tools, Nconvert is not a disappointment. It features commands for changing the color channel type and profile, adjusting the quality, adding alpha channels, adjusting the brightness, the contrast and the saturation levels, noise reduction and applying effects and filters (masking, deinterlacing, vignetting, detail enhancement, emboss, focus enhancement, equalize, blur, normalize are just some examples).

Also, there are commands for applying watermarks or adding texts onto your pictures, compression and setting a maximum file size. While high-resolution images are supported, converting huge images require a large amount of resources and may not always work.

The wide range of supported input formats, together with the variate set of processing tools makes Nconvert a powerful batch image conversion application. Although it only works using the command prompt, its syntax is simple and the usage is pretty straightforward for those who are accustomed to the console.