A round file is a type of file which is used to de-bur and smooth down round or oval holes in metalwork. Round files can also be used to smooth tight curves in cut metalwork where a flat-file or half round file cannot reach.

Round files come in a wide variety of sizes to suit different jobs, however they also tend to have a tapered shaft so they can smooth a variety of sizes - within a certain range.

Round files can have either plastic or wooden handles. To keep the file in good condition it should be regularly sharpened and cleaned.