This article deals with the command convert. For an overview about what you can convert and how, please see conVersIOn.
Convert is the graphics file format converter from the ImageMagick package. It allows for converting between graphic file formats and to do image manipulation on an image.
convert whatever.tif whatever.jpg
Converts the file whatever.tif to jpeg format and stores it as whatever.jpg.
convert *.jpg whatever.pdf
Converts the files *.jpg into a single PDF. However, this may yield large files while:
convert *.jpg -compress jpeg -quality 100 whatever.pdf
usually proves more satisfactory.
convert test.jpg -resize 1024x768 test2.jpg