If you are going to use air tools, you need an air compressor. Answering the above question, however, is not that simple. Not all compressors can be used with all air tools, and you also have to take other factors into account, such as the circumstances under which you are going to use your tools.
An important choice you need to make when choosing a compressor, is deciding whether an oil or oil-free air compressor best matches your needs. In oil compressors, the piston chamber that is used to draw in air is lubricated and cooled with oil. Oil compressors are highly reliable and durable, and are therefore commonly used for industrial purposes. However, compressed air produced by oil compressors always contains a tiny bit of oil, which may be undesirable for certain applications.