A high-power longitudinally end-diode-pumped Nd:YLF all-in-one laser has been constructed and tested. The compact single-cavity laser generates pulses with durations of 28 ps. Pulse energies of ~120 or -500 microJ are measured at a 1-kHz repetition rate when the all-in-one laser is pumped with a 3- or 15-W diode laser, respectively. Controlled prelasing is utilized to prevent the buildup of large-amplitude relaxation oscillations and to minimize the prelasing leakage. Pulse shaping in the all-in-one laser is analyzed in terms of the Kuizenga-Siegman theory.