Convert PEN to CG4

Convert PEN RAW photos to CG4 without losing quality. reaConverter processes entire shoots with consistent color and exposure settings.

Batch PEN 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. Photographers use it to batch process entire shoots in minutes.

PENCG4

How to Convert Multiple PEN Images to CG4?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting PEN files in under two minutes. You can also resize, crop, and adjust images during conversion.

2. Load your PEN files

Start reaConverter and add your .pen files. The software processes everything locally, so your files never leave your computer.

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

Load your PEN 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 PEN 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.

PEN to CG4 Converter

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

Do more with your images

Converting PEN images for use in a larger project? With reaConverter, you can convert, edit, and enhance your images in one streamlined process.

Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

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

PEN to CG4 Conversion: FAQ

Can reaConverter convert PEN to CG4?

Yes! reaConverter instantly converts .pen 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.

What is reaConverter used for?

reaConverter is a software program used for converting images and other types of files from one format to another. It supports a wide range of file formats and allows users to convert multiple files at once, making it a valuable tool for graphic designers, photographers, and other professionals who work with digital images. reaConverter also includes features for resizing, cropping, and editing images, along with batch processing capabilities that help automate repetitive tasks.

Can I convert PEN to CG4 online?

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

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

The best way to change PENs 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 PEN to CG4.

How can I automate PEN 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 PEN 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 pen to cg4 converter for batch processing.

What else can I do with reaConverter?

Convert DICOM filesResize pictureChange format settingsChange DPIConvert CAD formats

Find out more

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