GeoJSON Splitter

Split large GeoJSON files into multiple smaller files based on properties like country, admin level, type, or any other attribute.

Input GeoJSON

or drag & drop

How to Use

1. Upload GeoJSON file or paste data
2. Select property to split by (e.g., "country", "admin_level", "type")
3. Preview split — See how many files will be created
4. Download all files as a ZIP archive

Features

✓ Split by any property — Country, admin level, category, or custom field ✓ Smart grouping — Automatically groups features by property value ✓ Preview before split — See file count and feature distribution ✓ Batch download — Download all files as ZIP ✓ Property detection — Auto-detects available properties ✓ Preserve structure — Maintains all feature properties and geometry

Use Cases

🗺️ Split by country — Divide world dataset into individual country files 🏛️ Split by admin level — Separate provinces, states, districts 🏙️ Split by city — Extract individual cities from national dataset 📊 Split by category — Group features by type (roads, buildings, parks) 🎯 Data distribution — Create manageable chunks for download 🔍 Focused analysis — Extract specific regions for detailed work

Common Split Properties

Geographic Properties

{
  "country": "United States",
  "admin_level": "1",
  "state": "California",
  "city": "San Francisco"
}

OpenStreetMap Properties

{
  "admin_level": "2",
  "ISO3166-1": "US",
  "name": "United States"
}

Custom Properties

{
  "category": "residential",
  "zone": "A",
  "district": "Downtown"
}

Example: Split World Countries

Input: Single GeoJSON with all world countries

Property: "ISO_A3" (ISO 3-letter code)

Output: 195+ files

• USA.geojson
• CAN.geojson
• GBR.geojson
• ...and so on

Tips

💡 Choose unique identifiers for clean splits (ISO codes, IDs) 💡 Check property values before splitting to avoid unexpected results 💡 Use admin_level for OpenStreetMap administrative boundaries 💡 Preview first to verify file count and distribution 💡 Name properties should be consistent across features

Technical Details

Input Format

• GeoJSON FeatureCollection
• Features with properties object
• Any geometry type supported

Output Format

• Individual GeoJSON files per unique property value
• ZIP archive with all files
• Filename based on property value (sanitized)

Limitations

• Property must exist in all features (or will group as "undefined")
• Maximum recommended: 1000 split files
• Large files may take time to process

Related Tools

• TopoJSON Splitter — Split TopoJSON files
• GeoJSON Merger — Merge multiple GeoJSON files
• GeoJSON Minifier — Reduce file size

Frequently Asked Questions

Q: What happens if a feature doesn't have the split property? A: Features without the property are grouped into an "undefined.geojson" file.

Q: Can I split by multiple properties? A: Not directly, but you can split once, then split the results again by another property.

Q: How are filenames determined? A: Filenames use the property value, sanitized to remove invalid characters (e.g., "/" becomes "_").

Q: Can I split very large files (>100MB)? A: Yes, but processing may take time. For files >500MB, consider using command-line tools like GDAL.

Q: What if two features have the same property value? A: They're grouped into the same output file (that's the whole point!).

Q: Can I split by numeric properties? A: Yes, numeric values are converted to strings for filenames.

Q: Will splitting preserve coordinate precision? A: Yes, all coordinates are preserved exactly as in the original file.

Q: How do I split OpenStreetMap data by country? A: Use the "ISO3166-1" or "ISO3166-1:alpha2" property from OSM admin boundaries.