Convert CPI to CG4

CPI to CG4 made simple. Add files or folders, pick your settings, click Convert. reaConverter handles the rest — even thousands of files.

CPI to CG4 conversion is faster with the right tool. reaConverter handles everything from a few files to thousands in one batch. Processes files consistently every time, with full control over quality and output settings.

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How to Convert Multiple CPI Files to CG4?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting CPI files in under two minutes.

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Install reaConverter

2. Load your CPI files

Launch reaConverter and drop in your CPI files. The software queues everything for batch processing with consistent settings.

Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

Load your CPI files into reaConverter

3. Select CG4 as output format

Pick CG4 as output format and choose the destination folder where you want to save new .cg4 files.

Select CG4 as output format

4. Start CPI to CG4 conversion

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

Start Conversion

Once the conversion is complete, you can find your CG4 files in the destination folder you selected.

CPI to CG4 Converter

reaConverter offers the fastest, simplest solution for converting your CPI files into CG4 in seconds - all files processed on your PC for maximum privacy and speed.

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Do more with your files

Converting CPI 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.

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Image editing

User Reviews

Average User Rating:
Last updated on January 25, 2026
"reaConverter saved our team hundreds of hours by digitizing decades of CG4 archives in weeks—not months. Its resolution scaling preserved every detail, even in files older than some team members!"
Anna K.
Anna K.
Satisfied Customer
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
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"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
R. Lewis
R. Lewis
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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."
Walter Morgan
Walter Morgan
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"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."
J. Mitchell
J. Mitchell
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"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."
Malik T. Martin
Malik T. Martin
Satisfied Customer

CPI to CG4 Conversion: FAQ

What are CPI files?

The CPI extension is attached to vector files created using Calamus, a piece of desktop publishing software released in the late 1980s. Calamus was designed for the Atari ST, which was an innovative brand of home computers at the time, and was one of the first vector handling programs to include its own proprietary vector formats, as well as support virtual objects and frames. Since its release, Calamus had several subsequent upgrades and its latest version is Calamus SL2006.

What are CG4 files?

CG4 is a raster format associated with CALS (Continuous Acquisition and Life-Cycle Support) — a program initiated by the US Department of Defense to capture and link military data. CG4 is compatible with a very limited number of digital graphics programs. Files with this extension contain a bitmap that often uses the CCITT4 compression, which is an old fax machine standard used for black-and-white images.

Can reaConverter convert CPI to CG4?

Yes! reaConverter instantly converts .cpi to .cg4 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 CPI to CG4 online?

If you only need to convert a few CPI files to CG4 format, feel free to try our free online free online CPI to CG4 converter — perfect for small batches with no installation needed!

How can I turn CPI files into CG4 on my computer?

The best way to change CPIs to CG4s 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 CPI to CG4.

How can I automate CPI to CG4 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 CPI files to CG4 using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line cpi to cg4 converter for batch processing.

What else can I do with reaConverter?

Convert GIS filesCopy EXIF dataConvert Gerber imagesCrop photosConvert PDF

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