100% Secure & Private

C4 Converter

Stop converting C4 files one by one. reaConverter processes entire folders in one run, with the same settings applied throughout.

DownloadC4 ConverterConvert
C4 Files
Online
4.8

Over 25 years of experience

Your files never leave your PC

Read what our users say →

How to Convert .c4 Files in Bulk

1. Install reaConverter

Download reliable C4 conversion software to convert multiple .c4 files and folders in one go.
reaConverter logo
Install reaConverter

2. Select C4 Files

Select C4s from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load C4 files

3. Start Conversion

Click Convert to start the bulk conversion of all selected C4 files. The process will begin right away.
reaConverter - Start C4 conversion

Step by step

See It in Action

For quick and effortless C4 file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.

Download reaConverter

Extra Tools

Do more with your files

Converting C4 files for use in a larger project? 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

From those who tried it

Average User Rating:
Last updated on June 26, 2026
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 program is incredibly simple and user-friendly, even beginners can use it with ease. It supports batch processing, works offline, and runs smoothly on my aging Acer Aspire laptop. Best of all, the output quality is outstanding!
Kevin Harris
Kevin Harris
Happy User
Tried a few image tools before, but this one is by far the easiest. Drag, drop, convert — done in seconds. It saved me a ton of time when organizing my image folders.
Lisa K.
Lisa K.
Happy User
We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works.
David R.
David R.
IT Solutions Architect
Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!
Richard E. Miller
Richard E. Miller
Satisfied Customer
An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness.
Elena Anderson
Elena Anderson
Happy User

Questions & Answers

C4 files: Frequently Asked Questions

What are C4 files?

A C4 file represents an Edmics or Jedmics bi-level raster image. Jedmics stands for "Joint Engineering Data Management Information and Control System" and represents an initiative of the US Department of Defense. C4 Jedmics files contain bitmap images intended for military use and are considered very rare files.

Can reaConverter open C4 files?

reaConverter fully supports the C4 file format – open, edit, and export C4 files to any other popular file format with ease.

How do I change C4 to another format?

reaConverter is a user-friendly tool for converting C4 files. Once installed on your computer, it allows you to convert all your .c4 files at once with just a few clicks. You can even convert c4 images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert C4 online?

If you only want to convert a few C4 files, you are welcome to try our free online C4 converter.

How can I turn C4 files on my computer to another format?

The best way to convert C4 files on your PC is to get 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 C4.

How can I automate C4 files conversion?

reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.

Can I convert C4 files using scripts or the command-line interface?

reaConverter provides full access to all its features from the Windows command-line shell, including the command-line c4 converter.

What else can I do with reaConverter?

Convert GIS filesConvert RAW filesConvert raster to vectorChange bit depthConvert PDF

What formats can I convert a C4 file to?
c4 → aic4 → apngc4 → avifc4 → bmpc4 → bpgc4 → calc4 → cg4c4 → cgmc4 → cinc4 → citc4 → dcmc4 → dcxc4 → ddsc4 → dgnc4 → disc4 → drwc4 → dwfc4 → dwgc4 → dxfc4 → emfc4 → epic4 → epsc4 → faxc4 → fitsc4 → flifc4 → gbrc4 → gifc4 → glbc4 → gltfc4 → hpgc4 → hruc4 → icoc4 → iffc4 → igesc4 → igsc4 → jp2c4 → jpegc4 → jpgc4 → jxlc4 → jxrc4 → ktx2c4 → mifc4 → mtvc4 → pclc4 → pctc4 → pcxc4 → pdfc4 → pgmc4 → picc4 → pltc4 → pngc4 → ppmc4 → prcc4 → psc4 → psdc4 → qoic4 → qrtc4 → radc4 → rlac4 → sgic4 → shpc4 → stepc4 → stlc4 → stpc4 → svgc4 → svgzc4 → tgac4 → tifc4 → tiffc4 → u3dc4 → webpc4 → webpllc4 → wmfc4 → wmzc4 → wpgc4 → wrlc4 → x3dc4 → xbmc4 → xpm

Discover More

Beyond C4 conversion

Convert .c4 files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.

DownloadreaConverterPurchase

Free trial · Windows 10/11 · v8.0.246 · Files never leave your computer

reaConverter software