Convert PEF to CG4

Batch convert PEF RAW files to CG4 in one click. reaConverter handles entire photo libraries with consistent settings.

Online converters too slow for your PEF files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure. Studios rely on it for consistent color across thousands of photos.

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PEF to CG4
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PEFCG4

How to Convert Multiple PEF Images to CG4?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting PEF files in under two minutes. reaConverter also includes editing tools: resize, crop, rotate, and more.

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Install reaConverter

2. Load your PEF files

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

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

Load your PEF files into reaConverter

3. Select CG4 as output format

Select CG4 from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

Select CG4 as output format

4. Start PEF 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.

PEF to CG4 Converter

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

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Do more with your images

Converting PEF 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.

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User Reviews

Average User Rating:
Last updated on January 25, 2026
"If you've ever shot with Pentax cameras, you know the struggle of working with PEF files. Converting them to standard JPEG is a real challenge—unless you have reaConverter. Skip the online services; just install it and say goodbye to conversion headaches!"
Alan Foster
Alan Foster
Satisfied Customer
"An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."
Roger Cook
Roger Cook
Happy User
"For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results."
Jamal Bailey
Jamal Bailey
Satisfied Customer
"Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!"
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
"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
"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer

PEF to CG4 Conversion: FAQ

What are PEF files?

The PEF image format is used for creating RAW images with Pentax cameras. Shooting in RAW mode allows the camera to capture everything its sensors can register, thus preserving a huge amount of details — as opposed to JPEG or other compressed formats, which have predefined settings and are processed automatically. With PEF images, photographers have more freedom to change the image during digital post-processing without affecting its quality. With the help of specialized software, aspects such as lights, exposure and shadows can be customized in the image, highlighting or hiding particular details.

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 PEF to CG4?

Yes! reaConverter instantly converts .pef 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 PEF to CG4 online?

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

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

The best way to change PEFs 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 PEF to CG4.

How can I automate PEF 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 PEF 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 pef to cg4 converter for batch processing.

What else can I do with reaConverter?

Change file dateConvert RAW photo formatsConvert vector imagesConvert picture color spaceConvert PDF

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