C compiler shine tsarin kwamfuta wanda ke fassara tushen code da aka rubuta a cikin yaren shirye-shiryen C zuwa lambar injin da kwamfuta za ta iya aiwatarwa kai tsaye. Mai tarawa yawanci yana yin gyare-gyare iri-iri da bincika lambar tushe, kamar duban ma'auni, duba nau'in, da tsara lamba. Sannan za a iya gudanar da lambar injin ɗin akan dandamalin da aka yi niyya, kamar kwamfuta ta sirri ko uwar garken, ba tare da buƙatar ƙarin haɗawa ko fassarar ba. C compilers ana amfani da su sosai wajen haɓaka software don aikace-aikace iri-iri, gami da shirye-shiryen tsarin, direbobin na'urori, da tsarin da aka saka.