Convert EF3 to CAL

The quick and simple way to convert EF3 to CAL files is to use a quality batch conversion software, such as reaConverter.

reaConverter is an advanced EF3 to CAL conversion software. It also includes batch processing capabilities that allow you to automate repetitive tasks, enabling lightning-fast conversions of hundreds of files at once while preserving quality.

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How to Convert Multiple EF3 Files to CAL?

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. reaConverter is incredibly powerful and boasts an extensive variety of features.

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Install reaConverter

2. Load your EF3 files

Start reaConverter and load all the .ef3 files you intend to convert into .cal. The software supports multiple EF3 conversion and processes all files locally on your computer.

Select EF3s from a folder or by drag-and-dropping them directly into the reaConverter window.

Load your EF3 files into reaConverter

3. Select CAL as output format

Pick the CAL as output format and choose the destination folder where you want to save new .cal files.

Select CAL as output format

4. Start EF3 to CAL conversion

Then simply press Convert button and your conversion will begin in no time!

Screenshot

Once the conversion is complete, you can find your CAL files in the destination folder you selected.

EF3 to CAL Converter

reaConverter offers the fastest, simplest solution for converting your EF3 files into CAL in seconds - all files processed on your PC for maximum privacy and speed.

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Do more with your files

Converting EF3 files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on May 24, 2025
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
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"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
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"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
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"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
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EF3 to CAL Conversion: FAQ

What are EF3 files?

EF3 is a format associated with fax machines manufactured by Everex under the Everfax brand, which was fairly popular in the late 1980s. EF3 files contain images of sent and received documents and might be difficult to open using regular image viewers. Everex was well known as a manufacturer of tape drives, graphic boards, DTP products and other computer devices throughout the 1980s, but its success decreased in time. After filing for bankruptcy, the company was acquired by New Market Technology in 2008 and now continues to produce desktop computers and notebooks.

What are CAL files?

A CAL image file represents a monochrome bitmap image that uses the CALS raster image standard for storing graphics data. This standard was created in the 1980s by the US Department of Defence as a compressed interchangeable image format. CAL and CALS are extensions used for similar purposes.

Can reaConverter convert EF3 to CAL?

Yes! reaConverter instantly converts .ef3 to .cal with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert EF3 to CAL online?

If you only need to convert a few EF3 files to CAL format, feel free to try our free online free online EF3 to CAL converter — perfect for small batches with no installation needed!

How can I turn EF3 files into CAL on my computer?

The best way to change EF3s to CALs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from EF3 to CAL.

How can I automate EF3 to CAL files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert EF3 files to CAL using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line ef3 to cal converter for batch processing.

What else can I do with reaConverter?

Convert GIS filesConvert RAW photosConvert DICOM filesResize picturesChange format settings

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