Eight-time European champion Germany had already won the group before Sunda's (AEST) clash in Milton Keynes, but there was no let-up from Martina Voss-Tecklenburg's impressive side.
Sophia Kleinherne headed Germany ahead shortly before the interval and Alexandra Popp doubled their lead early in the second half – the 31-year-old's third goal in as many games at the tournament.
Nicole Anyomi then made it 3-0 to Germany, which will face Austria at Brentford Community Stadium on Friday (AEST) in the last eight.
Spain left it late to edge past Denmark at Brentford.
Marta Cardona headed in the 90th-minute winner to set up a quarter-final clash against in-form host England in Brighton on Thursday (AEST).