jCard to vCard data
File type: Various data file
The abnf file contains data associated with jCard to vCard, a tool for converting contact data between these formats.
It is a support data file for the conversion software rather than a standalone contact file.
File type category:
Various data file
Date updated: October 6, 2026
The abnf file extension is associated with jCard to vCard, a conversion tool available on multiple platforms. The file stores data used by the program.
Because this file supports the conversion software, its contents can be viewed as text, but it is not itself a jCard or vCard contact document.
Use any text editor to view the contents of an abnf file. The jCard to vCard software may use the file as part of its conversion process, but it is not intended to be opened as a contact document.
An abnf file is a support file for jCard to vCard and does not normally require conversion. The software converts jCard and vCard contact data rather than exporting this support file to another format.
Software applications that handle other tasks involving abnf files:
Multiplatform
Language
