A juicer, with a safety lid, for shredding, pressing or crushing fruits, vegetables, leaves or roots is described. The lid is designed so that the user cannot put their hand in contact with the juicer blade. The juicer comprises a container (100); a sieve, grill or net (200) positioned inside the container (100); a screw (300) for extracting the juice of a material by being positioned inside the net (200). The juicer includes a lid (400) with a cover (700) with first (710) and second (720) portions. The cover pivots or rotates about a hinge. Pushing the second cover portion (720) closes the first cover portion (710) over the input mouth of the lid, so that only objects of the appropriate size can be fed into the juicer blades.