Encryptafile encrypted data
File type: Encoded and encrypted file
An efl file extension is related to the Encryptafile and used for its encrypted data.
Found 2 different file type records with the same efl filename suffix.
File type category:
Encoded and encrypted file
Date updated: November 30, 2018
Record marked as obsolete and not updated for a long time.
The efl file extension is used by Encryptafile, a software used to protect case sensitive data.
The efl file contains encrypted data.
Most likely some old format without support. No further information could be found.
Software applications that handle other tasks involving efl files:
Microsoft Windows
File type category:
Various data file
Date updated: September 27, 2026
External Format Language files belong to NFBTRANS, an MS-DOS program designed for braille translation. They contain format definitions or instructions that help the program interpret and process text from an external file format.
An EFL file is a supporting file for NFBTRANS rather than a standalone document. NFBTRANS reads the file as part of its processing configuration when the associated external format is used.
This format is associated with the historical MS-DOS version of NFBTRANS and is unlikely to be used by current software.
Open an EFL file with NFBTRANS on Microsoft MS-DOS. The file is intended to be read by the program as an external format definition, not opened as a normal user document.
A plain-text editor may allow the contents to be inspected, but editing the file outside NFBTRANS can prevent the associated format definition from working correctly.
An EFL file is a format-definition file, not a document format, so it normally has no useful conversion to another file format. Keep it with the NFBTRANS files that use it.
If the formatting rules are needed in another translation system, they generally must be recreated in that system's configuration or format-definition format.
Software applications that handle other tasks involving efl files:
Microsoft MS-DOS
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