G3 Converter
Convert G3 files without uploading anywhere. reaConverter works offline — fast, private, handles thousands of files at once.
How to Convert .g3 Files in Bulk
1. Install reaConverter
2. Select G3 Files
3. Start Conversion
Convert G3 on your PC
For quick and effortless G3 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.
Do more with your files
Converting G3 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.
User Reviews
Average User Rating:Last updated on January 29, 2026
G3 files: Frequently Asked Questions
What are G3 files?
A G3 file most likely contains the digital image of a document that was either sent or received by fax. Such files use a type of compression called "Group 3", meant to efficiently minimise file size by compressing the white space which generally predominates in faxed documents. G3 files were mostly used during the fax machine era and are currently considered rare and obsolete.
Can reaConverter open G3 files?
reaConverter fully supports the G3 file format – open, edit, and export G3 files to any other popular file format with ease.
How do I change G3 to another format?
reaConverter is a user-friendly tool for converting G3 files. Once installed on your computer, it allows you to convert all your .g3 files at once with just a few clicks. You can even convert g3 images directly from Windows Explorer using the right-click menu — fast and convenient.
Can I convert G3 online?
If you only want to convert a few G3 files, you are welcome to try our free online G3 converter.
How can I turn G3 files on my computer to another format?
The best way to convert G3 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 G3.
How can I automate G3 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 G3 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 g3 converter.
What else can I do with reaConverter?
Convert CAD formatsSet picture bit depthSet file dateCopy EXIF dataConvert DICOM images
What formats can I convert a G3 file to?
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