EFX Converter

Convert EFX files online for free

Select File
Drop or upload your .EFX file

Online File Converter

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How to convert your EFX file

Click the "Select File" button above, and choose your EFX file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.

Convert EFX to another file type

The converter easily converts your EFX file to various formats - free and online. No Excel or extra software needed.

EFX to PDF
EFX to CSV
EFX to JSON
EFX to XML
EFX to YAML
EFX to YML
EFX to TOML
EFX to INI
EFX to CFG
EFX to CONF
EFX to DAT
EFX to DB

Convert a file to EFX

The converter also works in reverse, so you can convert other Raster Image formats to EFX with high quality output.

DBF to EFX
XML to EFX
SQLITE to EFX
XLSX to EFX
SQL to EFX
TSV to EFX
ACCDB to EFX
YAML to EFX
MDB to EFX
CSV to EFX
ODS to EFX
JSON to EFX

About EFX files

The .efx file extension primarily represents an eFax Document, a proprietary digital fax format developed by j2 Global. These files function as multi-page raster images - similar to TIFF - but are encapsulated in a specialized container designed for the eFax service.

The Problem: The core challenge with .efx files is proprietary lock-in. They generally cannot be opened by standard operating system tools like Windows Photo Viewer, Apple Preview, or web browsers. To view them natively, you are often forced to download and install legacy software like eFax Messenger, which may be cumbersome or incompatible with modern mobile workflows.

The Solution: For business continuity and accessibility, converting .efx files is the industry standard.

For Universal Access: Convert to PDF. This is the best target format for emailing, printing, and viewing faxes on mobile devices.
For Archiving: Convert to TIFF or PDF/A to preserve the exact pixel data of the original fax without the proprietary header.
For Image Editing: Convert to PNG or JPG if you need to import a fax page into design software like Adobe Photoshop.

Note for Gamers: If you discovered this file in a game folder (e.g., Devil May Cry 4 or Cabal Online), it is likely a Game Visual Effects file used by the MT Framework engine. These are compiled binary scripts governing particle effects and cannot be converted to document formats.

Use Convert.Guru to open and convert your EFX file.

Users also converted EXF, MP4, FAX, JFX, HFX and PDF files.

The EFX Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our EFX converter.