According to Jainism, no one created this universe.

• The universe (loka) is beginningless and endless – it has always existed and will always exist.
• It is made of eternal substances like jīva (souls) and ajīva (matter, space, time, motion, rest, etc.), which are also uncreated.
• Everything functions through natural laws and karma, not by the will of a creator God.
• Even devas (gods) and Tirthankaras (Arihants) are not creators – they are souls who have progressed spiritually. Tirthankaras only show the path to liberation.

Both Digambar and Śvetāmbara traditions agree on this: > There is no creator God in Jainism; the cosmos is self-existing and eternal.

You can read a simple explanation on JainKnowledge here: “what jainism say about creator for universe” and “Then, according to Jainism,Who created the whole Universe?”