Transform French Lambert-93 X/Y columns into longitude and latitude. Select the coordinate columns, keep your original attributes and export a clean CSV without installing desktop GIS software.
Column names can differ; you select them in the converter.
id,x_l93,y_l93 1,700000,6600000
id,x_l93,y_l93,longitude,latitude 1,700000,6600000,3.00000,46.50000
| Check | Why it matters | What to do |
|---|---|---|
| Axis order | Longitude/easting is normally X; latitude/northing is normally Y. | Inspect a known record before processing the full file. |
| Source CRS | The same numbers produce a different location under a different CRS. | Read the dataset metadata; never select a CRS only because the values look plausible. |
| Zone or region | UTM and national grids are region-specific. | For projected coordinate datasets from mainland France. |
| Precision | Extra decimal places do not improve inaccurate source coordinates. | Choose decimals appropriate for the target CRS and intended use. |
BulkConverter preserves non-coordinate fields, previews the first records, flags invalid rows and lets you append output columns or overwrite the selected X/Y fields. This makes it practical for asset registers, field exports, address datasets and GIS handoffs.
Browse supported coordinate systems or use the single coordinate converter for a quick check.
Upload the CSV, select the source X/Y columns, confirm Lambert-93 (EPSG:2154) as the source and WGS84 (EPSG:4326) as the target, then download the converted CSV.
Yes. Preserve original columns is enabled by default, so identifiers, names and attributes remain in the output.
No. Coordinate parsing and transformation run in your browser. Your source file does not need to leave your device.
Confirm axis order, source CRS, UTM zone or national grid, decimal separator and whether the first row contains headers. Preview several known locations before using the result operationally.
Start with the preset, confirm the source CRS and inspect known records before export.
