XBF may refer to:
Extensible Application Markup Language Experimental Boundary Format, in Boundary representation "XBF", a song on the 2004 Fiona Sit album 'F' Debut Xe Bang Fai River, Laos LFHN (XBF) – Bellegarde – Vouvray Airport – Bellegarde, on List of airports by ICAO code: L XBF, a Variant of SARS-CoV-2 abbreviations for ex-boyfriend abbreviations for ex-best friend