Free online CSV to GEOJSON converter

CSV is a simple tabular file format that stores data in rows and columns, usually separated by commas. GeoJSON is a geographic data format based on JSON, used to represent map features such as points, lines, and polygons with coordinates and properties.

Why convert csv to geojson

Converting CSV to GeoJSON is useful when your spreadsheet contains location data such as latitude and longitude, addresses, or place names that need to be displayed on maps or used in GIS applications. GeoJSON is widely supported by web mapping tools, spatial databases, and geographic software.

What data is needed

To create valid GeoJSON from a CSV file, your table should include at least one coordinate pair, usually latitude and longitude. If your CSV contains only addresses, they must be geocoded first before conversion. Additional columns can become feature properties in the GeoJSON output.

Best software for conversion

The best choice depends on your workflow:

• QGIS — best for accurate GIS work and manual control over coordinate systems.
• Mapshaper — fast and simple for lightweight conversion and cleanup.
• GDAL/OGR — powerful command-line option for advanced users and automation.
• geojson.io — convenient for quick browser-based conversion and inspection.

For most users, QGIS is the best overall software because it handles CSV import, coordinate assignment, and GeoJSON export reliably.

How to convert csv to geojson in qgis

1. Open QGIS and load your CSV file using Layer → Add Layer → Add Delimited Text Layer.
2. Select the correct delimiter and assign the longitude field as X and the latitude field as Y.
3. Verify the coordinate reference system if needed.
4. Right-click the imported layer and choose Export → Save Features As.
5. Select GeoJSON as the output format and save the file.

How to convert csv to geojson with command line

If you prefer automation, GDAL/OGR can convert CSV to GeoJSON using ogr2ogr. This is ideal for batch processing and repeatable workflows. Make sure your CSV includes coordinate fields and that the geometry columns are mapped correctly.

Common issues to avoid

• Wrong coordinate order — longitude should usually be X and latitude should be Y.
• Missing coordinates — rows without coordinates cannot become map features.
• Invalid encoding — save the CSV in UTF-8 to preserve special characters.
• Incorrect delimiter — confirm whether the file uses commas, semicolons, or tabs.

Conclusion

CSV to GeoJSON conversion is straightforward when your data includes coordinates and clean column names. For the best balance of ease and reliability, use QGIS; for automation, choose GDAL/OGR; and for quick online work, use geojson.io.