FX or Fx is a two-letter combination that has multiple meanings, including:

• FX Networks, a cable/satellite television network
• FXAbbreviation of "effects" – see special effects, sound effects
• F/X – a movie set in the behind-the-scenes world of special effects. There was also a sequel, F/X2 .
• – a television series based on the movie
• in air travel, FX, the IATA code for FedEx
• in computing, Fx, an abbreviation for Firefox (the WWW browser)
• Foreign exchange, see exchange rate, a banking term for changing money from one currency into another currency.
• Also the name of the popular FX clan www.fx-clan.co.uk