A sharpener is a tool for sharpening. It may refer to:
- Knife sharpener, a tool for sharpening a knife
- Sharpening steel, a tool for sharpening a knife, usually a kitchen knife
- Sharpening stone, a tool for sharpening a bladed or edged tool, such a knife
- Pencil sharpener, a tool for sharpening a pencil
- Sharpening jig, a tool for sharpening a woodworking tool
