Carbonite may refer to:

• Carbonite (explosive), one of the earliest and most successful coal-mining explosives
• Carbonite (ion), the inorganic anion that forms the conjugate base of dihydroxymethylidene with the chemical formula [CO₂]²⁻
• Carbonite (online backup), an online backup service
• Carbonite (Star Wars), a fictional substance, most notably used to imprison Han Solo in the film The Empire Strikes Back
• Carbonite-2, an imagery technology demonstrator satellite