'format-agnostic' originates from the combination of 'format' and 'agnostic,' where 'format' refers to the arrangement or layout of data, and 'agnostic' means not committed to a particular belief or course of action.

'format' and 'agnostic' were combined in modern English to describe systems or software that are not limited to a specific format.

Initially, 'agnostic' referred to a philosophical position regarding the existence of deities, but in modern usage, it has evolved to describe a lack of commitment to a specific format or system.