Razor is part of the Julian Alps in Slovenia, and is bordered by the Luknja and Vršič passes to the east and west, and the Krnica and Trenta valleys to the north and south. Together with its neighbouring mountain Prisojnik, it serves to connect Triglav and Jalovec. It is included in Triglav National Park and is administratively part of Kranjska Gora.
The mountain is located in a limestone karst region, with the Križ Plateau (Kriški podi) below it being a typical example. The area has been heavily shaped by erosion, caused by glaciation, rivers, and precipitation; as a result, it has many caves, sinkholes, and limestone pavements.