できた (dekita) means “done” | MotiTan Japanese Dictionary

More examples

弟は一人で靴ひもを結び、「できた」と笑いました。otōto wa hito ri de kutsu hi mo o musu bi de ki ta to wara i ma shi ta

My little brother tied his shoelaces by himself and smiled, saying, "I did it."

Marks something that was being made or attempted as now finished.

よくできましたyokudekimashita: A phrase used to praise someone for completing a task well.

作っていたものが仕上がって、完成した状態になったことを表す言い方。tsuku tte i ta mo no ga shi a ga tte kan sei shi ta jō tai ni na tta ko to o arawa su i i kata

できた (dekita) is the past form of できる (dekiru, "to be completed"), with the past ending た (ta), so it reports that something has come to completion.

できた (dekita) is often said by the person who has just finished something, so English uses "It is done" or "I did it" rather than one fixed phrase.