How to Analyse a GEDCOM File Online

What is a GEDCOM file?

GEDCOM (Genealogical Data Communication) is the universal file format for sharing family tree data between genealogy programs. Whatever software you use to build your family tree, you can almost always export it as a .ged file.

A GEDCOM file contains structured records for individuals (names, dates, places), families (marriages, parent-child links), sources, and notes. GEDminer reads this structure to give you instant analysis without uploading your data to any server.

Step 1: Export your GEDCOM file

Most genealogy programs have an "Export" or "Download" option in their settings or file menu. Look for "Export as GEDCOM" or "Download .ged file".

The exact location varies by program - check the File, Tree Settings, or Tools menu. Online tree platforms usually offer a tree export option in account or tree settings. Save the resulting .ged file somewhere easy to find on your computer.

Step 2: Upload to GEDminer

Visit GEDminer and drag your .ged file onto the upload area, or click to browse. The file is processed entirely in your browser - nothing is sent to a server.

For large files (10,000+ individuals), parsing may take a few seconds. A progress indicator will show you the status.

Step 3: Explore the Overview

Once loaded, the Overview dashboard shows you key statistics at a glance:

• Total individuals and families in your tree
• Birth year distribution chart showing which centuries are best covered
• Gender breakdown and average lifespan estimates
• Data quality score highlighting how complete your records are

This is your starting point for understanding the shape and completeness of your tree.

Step 4: Check for errors

Head to the Integrity tab to find data quality issues. GEDminer detects:

• Impossible dates (death before birth, future dates, unrealistic ages)
• Missing vital records (people without birth or death information)
• Duplicate individuals (same name, dates, and locations appearing twice)
• Unlinked individuals (people not connected to any family)

Fixing these issues in your genealogy software improves the accuracy of all other analyses.

Step 5: Discover research opportunities

The Discovery tab reveals what to research next:

• Migration Analysis maps your family's movements across countries and continents
• Census Gap Detector finds which census records you should be searching for
• Research Plan Generator creates a prioritised list of next steps
• DNA Testing Planner identifies which living relatives to test first

Each tool gives you actionable suggestions you can take to archives, online databases, or DNA testing companies.

Tips for better results

• Use the latest GEDCOM export: Re-export after making changes in your main software.
• Set a Home Person: This enables relationship labels and more personalised analysis.
• Check all tabs: Each section reveals different insights you might miss otherwise.
• Export findings: Many tools let you export results as CSV for use in spreadsheets or research logs.