Tabletop air purifier with 3-stage filtration eliminates 99.97% of pollutants as small as 0.3 microns. A pre-filter removes larger particles such as dust and pet hair, a HEPA filter removes airborne microparticles, i.e., dust mites, allergens, bacteria, and pet dander, and an activated carbon filter reduces household odors such as smoke and aromas from cooking.