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H4 Converter
H4 files usually open only in GIS software. reaConverter reads them directly and converts whole folders into formats colleagues and clients can use.
How to Convert .h4 Files in Bulk
1. Install reaConverter
2. Select H4 Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless H4 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 H4 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
H4 files: Frequently Asked Questions
What are H4 files?
H4 (Hierarchical Data Format Release 4) is a container for scientific data in which every item carries a tag that tells programs what it is. A single file can hold several kinds of objects: scientific data sets, which are multidimensional arrays of measurements with units and calibration information, 8-bit and 24-bit raster images with optional palettes, tables made of records, and groups that link related items together. Any object can also have text notes attached. NASA's Earth Observing System built its HDF-EOS variant on top of HDF4, adding conventions for the geographic location of satellite data, which is why many MODIS and similar products come in this form. To convert an H4 file to graphics, a program lists the objects inside, so the person or script can choose one array. Raster images are saved directly, with their palette if there is one, while a data array is cut into a two-dimensional slice, scaled using the stored calibration, and painted with a color scale to obtain a picture of, for example, sea surface temperature or cloud cover. The result can be saved as PNG, JPEG, TIFF, or GeoTIFF, and files with many arrays give many images. Supported by the NCAR Command Language and MATLAB.
Can reaConverter open H4 files?
reaConverter fully supports the H4 file format – open, edit, and export H4 files to any other popular file format with ease.
Do I need QGIS or ArcGIS to convert H4 files?
No. reaConverter reads H4 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 H4 to another format?
reaConverter is a user-friendly tool for converting H4 files. Once installed on your computer, it allows you to convert all your .h4 files at once with just a few clicks. You can even convert h4 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 H4 online?
If you only want to convert a few H4 files, you are welcome to try our free online H4 converter.
How can I turn H4 files on my computer to another format?
The best way to convert H4 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 H4.
How can I automate H4 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 H4 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 h4 converter.
What else can I do with reaConverter?
Convert GIS filesConvert Gerber imagesChange image color spaceConvert CAD formatsSet file date
What formats can I convert a H4 file to?
Discover More
Beyond H4 conversion
Convert .h4 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.
