100% Secure & Private
GIS Converter
Turn GIS files into JPG, PNG, PDF and 800+ other formats. reaConverter handles bulk conversion with consistent quality.
How to Convert .gis Files in Bulk
1. Install reaConverter
2. Select GIS Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless GIS 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 GIS 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
GIS files: Frequently Asked Questions
What are GIS files?
GIS (ERDAS 7.x GIS file) is a single-band raster format for classified data, closely related to the multi-band LAN format of the same ERDAS 7.x generation. The file opens with a fixed-size header that starts with the text HEAD74 (older files use HEADER) and records the pixel type, the number of columns and rows, and the map coordinates of the grid. Pixels are stored as 4-bit, 8-bit, or 16-bit values, so a 4-bit file can hold only 16 classes. Because the numbers are class codes, the names and display colors of the classes are not stored with the pixels but in a separate companion file, often with the .trl extension. The header also carries only limited coordinate system information, so projections are usually described only by their units. To convert to graphics, a program reads the header, unpacks the pixels, and replaces each class code with its palette color, which gives an indexed or RGB picture that can be saved as PNG, GIF, JPEG, or TIFF. Without a palette, the codes can be shown as grayscale. GeoTIFF preserves the coordinates. Supported by ERDAS IMAGINE, ArcGIS, TerrSet, Geomatica, and MiraMon.
Can reaConverter open GIS files?
reaConverter fully supports the GIS file format – open, edit, and export GIS files to any other popular file format with ease.
Do I need QGIS or ArcGIS to convert GIS files?
No. reaConverter reads GIS 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 GIS to another format?
reaConverter is a user-friendly tool for converting GIS files. Once installed on your computer, it allows you to convert all your .gis files at once with just a few clicks. You can even convert gis 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 GIS online?
If you only want to convert a few GIS files, you are welcome to try our free online GIS converter.
How can I turn GIS files on my computer to another format?
The best way to convert GIS 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 GIS.
How can I automate GIS 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 GIS 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 gis converter.
What else can I do with reaConverter?
Convert RAW photosChange format settingsCopy metadata (EXIF, IPTC)Vectorize imagesSet bit depth
What formats can I convert a GIS file to?
Discover More
Beyond GIS conversion
Convert .gis 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.
