FGB → CG4 · Windows

Convert FGB to CG4

Online GIS converters cap file size and need an upload. reaConverter converts FGB to CG4 locally, whatever the size of the dataset.

Tired of converting FGB files one at a time? reaConverter processes entire folders to CG4 automatically. Handles large batches reliably without crashes or timeouts. Handles whole folders of tiles and layers in one run, with identical settings on every file.

.fgb.CG4
4.8

Converting files since 2001

Runs offline — nothing uploaded

Read what our users say →

How to Convert Multiple .fgb Layers to .cg4?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

2. Load your FGB files

Add FGB files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your FGB files into reaConverter

3. Select CG4 as output format

Set CG4 as output format and select where to save your converted files. Customize quality settings if needed.

Select CG4 as output format

4. Start FGB to CG4 conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .cg4 files will be waiting in the destination folder.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your FGB files into CG4 without GIS software - all files processed on your PC for maximum privacy and speed.

Map Data Workflow

Turn GIS data into something anyone can open

A map saved as CG4 opens on any computer and any phone. reaConverter produces those from FGB in batch, entirely offline.

  • Render every file in a folder to CG4 with the same size and settings
  • Set DPI and output dimensions before the run, not afterwards
  • Pick up new data automatically with Watch Folders, or script the job from the command line

Everything runs on your PC, which matters for cadastral, utility and client data that should not pass through an upload form.

GIS data conversion

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 13, 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
5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs.
J. Mitchell
J. Mitchell
Satisfied Customer
reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud.
Malik T. Martin
Malik T. Martin
Satisfied Customer
I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!
Sarah Lane
Sarah Lane
Satisfied Customer
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

FAQ

FGB to CG4 Conversion

Can reaConverter convert FGB to CG4?

Yes! reaConverter instantly converts .fgb 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 Windows converter for 800+ formats, GIS data among them. For FGB to CG4 it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document formats.

Why choose offline conversion with reaConverter?

reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.

Can I convert FGB to CG4 online?

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

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

The best way to change FGBs 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 FGB to CG4.

How can I automate FGB 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 FGB 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 fgb to cg4 converter for batch processing.

What else can I do with reaConverter?

Convert GIS filesConvert PDF filesAdd text on photosConvert RAW photosConvert DICOM files

Related conversions

Other ways to convert FGB files, and other sources that convert to CG4.

Discover More

Beyond format conversion

Batch conversion, editing, and processing across 800+ formats, from RAW and HEIC to DICOM, DWG, and PDF. Everything runs locally, with no cloud and no upload limits.

Free trial · Windows 10/11 · v8.0.250 · Files never leave your computer

reaConverter software