FZz

Fzz, often written fzz, is a three-letter sequence that appears in a variety of unrelated contexts. There is no single, universally accepted definition, so its meaning depends on the domain in which it is encountered.

In computing, .fzz is the file extension used by Fritzing, an open-source electronics design tool. Fritzing projects saved with the .fzz extension are typically compressed archives that include the circuit designs for multiple views—breadboard, schematic, and PCB—as well as associated resources. The format is intended to facilitate sharing, archiving, and collaboration on electronics projects created with Fritzing.

In popular culture and informal writing, fzz is sometimes used as an onomatopoeic representation of a fizzing or sizzling sound, similar to other sound words like fizz or zzz. It may appear in comics, cartoons, or casual text to convey a sensory impression without specifying a real object or action.

Because fzz lacks a single canonical meaning, its interpretation is strongly context-dependent. When you encounter the term, examining surrounding text or the relevant field is the best way to determine whether it refers to a file type, a sound effect, or another specialized usage.