Convert CT to CG4

Convert CT to CG4 without quality loss. reaConverter gives you full control over resolution, compression, and output settings.

Manual CT to CG4 conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer — no uploads, no cloud risks.

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How to Convert Multiple CT Files to CG4?

1. Download and Install reaConverter

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

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Install reaConverter

2. Load your CT files

Open reaConverter and add your CT files. You can load individual files, entire folders, or even nested subfolders.

Drop your CT files into the window or use File menu to browse and select folders.

Load your CT files into reaConverter

3. Select CG4 as output format

Choose CG4 as the target format. Pick a destination folder or let reaConverter save files alongside the originals.

Select CG4 as output format

4. Start CT to CG4 conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your CG4 files in the output folder. Click 'Show converted files' to open it directly.

CT to CG4 Converter

reaConverter offers the fastest, simplest solution for converting your CT 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 CT 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 16, 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
"Finally an app that actually opens my weird files! Saves me from format frustration daily."
Kyle Brooks
Kyle Brooks
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."
Marcus White
Marcus White
Healthcare IT
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
R. Lewis
R. Lewis
Happy User

CT to CG4 Conversion: FAQ

What are CT files?

A CT file represents a bitmap image associated with Iris printers. This brand of large-format color inkjet printers was released in the 1980s and is currently owned by Kodak. Iris printers are used for prepress purposes, delivering a hard copy that shows exactly how the image will look like, and allowing users to check colors and design before mass production printing. They were used particularly in the 1980s and 1990s for reproductions of fine art on different types of media, but in recent years have been superseded by Epson printers.

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 CT to CG4?

Yes! reaConverter instantly converts .ct 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 CT to CG4 online?

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

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

The best way to change CTs 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 CT to CG4.

How can I automate CT 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 CT 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 ct to cg4 converter for batch processing.

What else can I do with reaConverter?

Convert vector filesConvert picture color spaceConvert GIS filesConvert DICOM filesResize photo

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