Convert CDU to CG4

Convert CDU to CG4 without uploading files anywhere. reaConverter works entirely on your PC — fast, private, and handles thousands of files at once.

Batch CDU to CG4 conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required — convert anywhere, anytime.

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How to Convert Multiple CDU Files to CG4?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

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Install reaConverter

2. Load your CDU files

Load your CDU files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select CDUs from a folder or drag-and-drop them directly into the reaConverter window.

Load your CDU files into reaConverter

3. Select CG4 as output format

Choose CG4 for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select CG4 as output format

4. Start CDU to CG4 conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

Start Conversion

After processing, find all your new .cg4 files in the output location. The log shows details for each conversion.

CDU to CG4 Converter

reaConverter offers the fastest, simplest solution for converting your CDU 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 CDU 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 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 ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"
Logan B.
Logan B.
Satisfied Customer
"I use the online converter — it’s quick and hassle-free!"
Jian Wong
Jian Wong
Happy Online User
"Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!"
Helen Evans
Helen Evans
Satisfied Customer
"This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!"
Robert Williams
Robert Williams
Happy User
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
Henry R.
Henry R.
Happy User

CDU to CG4 Conversion: FAQ

What are CDU files?

The CDU extension is associated with images created or edited with CDU Paint, a software program used for handling bitmaps.

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 CDU to CG4?

Yes! reaConverter instantly converts .cdu 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 CDU to CG4 online?

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

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

The best way to change CDUs 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 CDU to CG4.

How can I automate CDU 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 CDU 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 cdu to cg4 converter for batch processing.

What else can I do with reaConverter?

Convert DICOM filesResize pictureChange format settingsChange DPIConvert Gerber files

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