Can somebody suggest me a good freeware mp3 converter?

please suggest me a freeware mp3 converter that can convert as many file formats to mp3 format.i have got some mp3 converters that are good but they consume more mb space after conversion.i am specifically on the lookout for a converter that uses very less mb space of your p.c after converting a file as compared to other mp3 converters.give me the web address for downloading it.