A portable safety device locks onto a step of a ladder to provide cushioning for the legs and to prevent the user from tipping the ladder sideways. The device comprises a center component connected to two U-shaped leg braces, a closeable handle, and a retractable clamp. The retractable clamp is extended when the closeable handle is opened and retracted when the closeable handle is closed. In the retracted position, the clamp securely grasps the front and rear edges of a selected step on the ladder to effectively attach the device to the ladder in an operable position. The two leg braces partially surround the user's lower legs, between the ankle and the knee, and include a cushion material for added comfort when the user's legs lean against the braces. The leg braces attach to the center component by locking into a horizontal track which allows the braces to be separated or brought together to adjust for the user's natural stance and leg separation. The leg braces help to stabilize the user when standing on the ladder and discourage the user from leaning dangerously too far to either side of the ladder, thereby preventing the ladder from tipping and possibly injuring the user.