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GFF Converter
Convert GFF data without installing QGIS or writing ogr2ogr commands. reaConverter is an ordinary Windows application with batch mode built in.
How to Convert .gff Images in Bulk
1. Install reaConverter
2. Select GFF Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless GFF 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.
GIS Toolkit
Do more with your GIS data
Need GFF data as something anyone can open? reaConverter renders imagery and elevation grids into standard images and documents without QGIS or ArcGIS, and works through whole folders in one pass.
- Render imagery, elevation grids and scanned charts to TIFF, PNG, JPG or PDF
- Resize, crop and set DPI on the output in the same run
- Bring tiles, scenes and grids from many sources into one consistent format
- Convert incoming survey and field data automatically with Watch Folders
- Script GIS conversions from the command line for pipelines and scheduled jobs
- Keep cadastral, utility and client data on your PC: nothing is uploaded
User reviews
From those who tried it
Average User Rating:Last updated on July 28, 2026
Questions & Answers
GFF images: Frequently Asked Questions
What are GFF files?
GFF (Ground-based SAR Applications Testbed File Format) is the native image format of Sandia National Laboratories for synthetic aperture radar data. A file starts with a header of variable length, which contains the instrument settings, image dimensions, and a flag that shows the byte order of the file. After the header comes a binary matrix in one of several pixel types: 16-bit or 32-bit complex numbers, or real values stored as bytes. Newer versions add header extensions, which carry extra metadata, such as the names of related image and phase files. For complex pixels, the file stores magnitude and phase, and since one of the drafts the phase always comes first, regardless of byte order. To convert a GFF file to graphics, a program reads the header, applies the byte order, and decodes the pixel type. Complex data are turned into an amplitude image, usually with logarithmic scaling, because radar returns span a very wide range of brightness, and are then stretched to 8 bits for PNG, JPEG, or TIFF. Phase can be exported as a separate image. Byte data can be saved directly as grayscale. Supported by MATLAB with Sandia's reader scripts.
Can reaConverter open GFF files?
reaConverter fully supports the GFF image format – open, edit, and export GFF files to any other popular file format with ease.
Do I need QGIS or ArcGIS to convert GFF files?
No. reaConverter reads GFF files on its own, so the conversion needs no GIS installation and no licence. It handles whole folders at once, which suits survey archives, tile sets and data deliveries that have to reach people working in other software.
How do I change GFF to another format?
reaConverter is a user-friendly tool for converting GFF files. Once installed on your computer, it allows you to convert all your .gff files at once with just a few clicks. You can even convert gff images directly from Windows Explorer using the right-click menu — fast and convenient.
Why choose offline conversion with reaConverter?
Keep your sensitive data 100% private with offline processing that never exposes files to cloud risks. Our software meets strict compliance standards (GDPR, HIPAA, CCPA) while handling confidential documents for legal, healthcare and financial sectors.
Can I convert GFF online?
If you only want to convert a few GFF images, you are welcome to try our free online GFF converter.
How can I turn GFF files on my computer to another format?
The best way to convert GFF images 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 GFF.
How can I automate GFF 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 GFF 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 gff converter.
What else can I do with reaConverter?
Convert microscopy filesResize picturesConvert raster to vectorChange bit depthConvert GIS files
What formats can I convert a GFF file to?
Discover More
Beyond GFF conversion
Convert .gff files in batches of any size, with editing and processing applied along the way. The same tool also handles 800+ other formats, including CAD, medical imaging, and GIS.
