What is a GNO file?
A .GNO file is a GenoPro Genealogy Tree File. It holds family tree data, personal relationships, and medical history. People create these files using software like GenoPro or Genogram Analytics.
Modern .GNO files use the standard ZIP compression format. This format stores XML data and images inside one single file container. Some older versions use different data structures. Alternative software like GenoGraph also uses the .GNO extension for genogram data.
How to open GNO files?
You can open .GNO files directly with GenoPro on a Windows computer. If you want to inspect the raw data of a modern .GNO file, you can rename the file extension to .ZIP. You can then extract the contents using standard archive tools like 7-Zip or WinRAR. This process reveals the internal XML documents and media files.
Online analysis and viewing
Because .GNO files have multiple possible meanings and versions, viewer.online/gno analyzes .GNO files to identify their exact format and creator software. It shows which programs can open the file, and usually previews it. If you do not have genealogy software installed on your device, this online tool helps you read the data quickly.
Summary
In summary, because .GNO files use the known ZIP format, viewer.online/gno can safely open and display them online, eliminating compatibility problems.