FF

FF, Ff, fF or ff may refer to:

Arts, entertainment, media

Logo of Finos Film, a former Greek film production company
Fast & Furious, a media franchise centered on a series of action films that are largely concerned with illegal street racing
Fantastic Four

ff – Südtiroler Wochenmagazin, an Italian weekly journal published in German language
Fire Force, a manga series about superhero firefighters with a serialized anime adaptation
Fantastic Four, a superhero team appearing in comic books published by Marvel Comics
Future Foundation, a fictional superhero team that replaced the Fantastic Four after the death of Johnny Storm, also published by Marvel Comics

Family Feud, an American syndicated game show
Family Fortunes, a British game show based on the American version
Freeform (TV channel), a US cable and satellite TV channel that is targeted to teens and young adults
FF, the production code for the 1966–67 Doctor Who serial The Highlanders

Found footage (pseudo-documentary), a film genre in which created footage is presented as if it were discovered
Fanfiction, unofficial writing about a work based on the work's characters and setting.

Faraday Future, a car company
Fianna Fáil, political party in the Republic of Ireland and Northern Ireland
Mukti Bahini (Freedom Fighters), armed organizations who fought against the Pakistan Army during the Bangladesh Liberation War
Tower Air (IATA code: FF), a certificated FAR 121 schedule and charter U.S. airline that operated from 1983 until 2000

File format, any of numerous ways to encode information on digital media
- .ff file format, used by game developer Infinity Ward to store data securely
- .ff file format, used by imaging technologies corporation Agfa-Gevaert to store font outline data
Firefox, a web browser developed by Mozilla Foundation
Flip-flop (electronics), a digital electronic circuit memory element
Form Feed, a control character in the C0 control code set used in ASCII
Full-frame digital SLR, a camera fitted with an image sensor equivalent in size to traditional 35 mm film
Adobe Font Folio, an Adobe software

Ferrari FF, a sports car
Jensen FF, the first non all-terrain production car equipped with 4WD and an anti-lock braking system
Feet forwards motorcycle
Front-engine, front-wheel-drive layout, a car designed with a front engine and front-wheel drive, colloquially known as "FF" for short
Front freewheel, a crankset for bicycles

Fast forward, forward movement through a recording faster than the speed at which it was recorded
Femtofarad (fF), a unit of capacitance equal to 1×10⁻¹⁵ farads
Fill factor (disambiguation), a term applied in various geometrical models and electronic devices
Filtration fraction, in renal physiology
Frasnian-Famennian extinction (F-F), also known as the Late Devonian extinction
FFmpeg, a free and open source suite of video and audio encoding libraries.

255 (number) (hexadecimal: FF₁₆), the largest numeric value possible for an unsigned byte
ff., and the following pages (in a citation)
FF, a bra size
False flag, a diversionary or propaganda tactic
Flirty fishing (FFing), evangelistic prostitution method formerly used by the Children of God
Follow Friday, a Twitter hashtag
FontFont, a font library owned by FontShop International
Founding Fathers of the United States
French Franc, a currency
Frequent flyer, often abbreviated as FF# on itineraries or travel documents
FF, a US Navy hull designation for a frigate