Just WAKE up or Just WOKE up?

Both are possible. (unless you want to start a sentence with 'Just woke up')

Try to make a sentence with each one.
Students: Are you brave enough to let our tutors analyse your pronunciation?
Thanks for the info.

He has to wake up. (the person is still asleep)

He just woke up. (the person was asleep)

I just woke up.

Teachers: We supply a list of EFL job vacancies
Rachel NoelJust WAKE up or Just WOKE up?

Just woke up