Actually, whether it is legal to rip DVDs based on the regulations of different regions. In some countries, it is legal to rip DVDs. But in some places, it would be against the copyright law if you rip DVDs for commercial purposes which leads to the actual loss of the owners. Hence, under different situations, the answers to this question would be different. But it should be noted that it is acceptable for you to rip DVDs only for personal use.