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HFZ Converter
Batch convert HFZ files with the same settings across a whole project, from a handful of layers to an archive of tiles.
How to Convert .hfz Files in Bulk
1. Install reaConverter
2. Select HFZ Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless HFZ 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 HFZ 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
HFZ files: Frequently Asked Questions
What are HFZ files?
HFZ is an HF2 heightfield file wrapped in gzip compression, which makes it the form most often used for storage and exchange. Inside the wrapper, the data follow the HF2 layout: a short header, optional extended blocks that can carry the map location, and a series of square tiles, each with its own scale and offset. Heights are stored as differences between neighboring cells and rounded to a vertical precision chosen when the file is saved, so smooth terrain compresses very well and rough terrain compresses less. This also explains why an HFZ file may be smaller than the same landscape in a fixed-depth format. A 16-bit TER file, for example, always has the same step, which for a 640 m height range is about 9.8 mm, and it wastes space on detail that nobody needs. To convert HFZ to graphics, a program unpacks the gzip layer, decodes the tiles into elevations, and creates a grayscale heightmap, a colored elevation map, or a shaded relief picture. Use of 16-bit output keeps fine height steps, while 8-bit output is coarser but smaller. The picture can be saved as PNG, JPEG, TIFF, or GeoTIFF with coordinates. Supported by L3DT.
Can reaConverter open HFZ files?
reaConverter fully supports the HFZ file format – open, edit, and export HFZ files to any other popular file format with ease.
Do I need QGIS or ArcGIS to convert HFZ files?
No. reaConverter reads HFZ 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 HFZ to another format?
reaConverter is a user-friendly tool for converting HFZ files. Once installed on your computer, it allows you to convert all your .hfz files at once with just a few clicks. You can even convert hfz 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 HFZ online?
If you only want to convert a few HFZ files, you are welcome to try our free online HFZ converter.
How can I turn HFZ files on my computer to another format?
The best way to convert HFZ 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 HFZ.
How can I automate HFZ 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 HFZ 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 hfz converter.
What else can I do with reaConverter?
Convert GIS filesConvert CAD formatsSet file dateConvert Gerber imagesChange image color space
What formats can I convert a HFZ file to?
Discover More
Beyond HFZ conversion
Convert .hfz 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.
