SMIL or Smil may refer to:

• SMIL (computer), a Swedish first-generation computer
• Synchronized Multimedia Integration Language, a www-standard markup language for multimedia presentations, including playlists and animated SVGs
• Vaclav Smil (born 1943), Czech-Canadian scientist and policy analyst
• smil.mil, an access to SIPRNet
• Izmail, a town in Ukraine sometimes known in Romanian as Smil
• Smil, or Samael, an archangel

• Smile (disambiguation)