4th Dimension Insider File
File type: Various data file
A 4FI file is a 4th Dimension Insider file associated with 4D SQL.
It is a proprietary file used by the 4D database environment rather than a general-purpose data exchange format.
File type category:
Various data file
Date updated: September 24, 2026
The 4FI file extension is used by 4D SQL, a database product from 4D. The 4FI format belongs to its 4th Dimension Insider tools and stores information used when inspecting or working with a 4D database project.
The format is part of the 4D software environment and is not intended to be read as an independent document. Its contents may depend on the associated 4D database and the software that created it.
4D SQL was available for multiple platforms, including Windows and macOS.
Open a 4FI file with the compatible version of 4D SQL or its 4th Dimension Insider tools on the platform where the related 4D database is available.
Do not edit the file in a text editor, because it uses a proprietary format and may be tied to its database project.
4FI files are internal to the 4D environment and are not normally converted directly to a common format.
If information from the related 4D database is needed elsewhere, open the project in compatible 4D software and use its database export features instead.
Software applications that handle other tasks involving 4fi files:
Multiplatform
Language
