Switch-mode power converters are used in a wide variety of applications. In most applications, it is desirable to design high-frequency switching power converters to increase their power density. However, the switching losses are increased by increasing the frequency. Moreover, large dv/dt and di/dt produce electromagnetic interference. To minimize the problems associated with the high-switching frequencies of power converters, several soft-switching techniques have been developed. In this chapter, these techniques will be reviewed.