Convert CSV files to XLSX, online and free. GISConverter reads your CSV data locally in the browser and writes a XLSX file so you can work with the data directly in Microsoft Excel — nothing is uploaded, and your data never leaves your computer.
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CSV is a spreadsheet-style table, so it isn't always the format the next tool expects. Converting it to XLSX lets you work with the data directly in Microsoft Excel without redrawing or re-collecting anything. Because GISConverter runs a full GDAL engine in your browser, the geometry and attributes carry across faithfully, and the file never leaves your device.
CSV (.csv): CSV is the universal spreadsheet exchange format: rows of plain-text values that open in Excel, Google Sheets or any text editor. For mapping, a CSV becomes spatial when it carries coordinate columns — typically latitude/longitude, or an X/Y pair — that a GIS can turn into points.
Excel (XLSX) (.xlsx): XLSX is the modern Microsoft Excel workbook format. Like CSV it holds tabular data, but with typed cells, multiple sheets and formatting. In a GIS context it is read for its attribute columns, with coordinate columns turning rows into mappable points.
Yes. GISConverter is completely free and runs in your browser — no signup, no watermark, and no daily limit.
No. Your CSV file is read and converted locally on your device with a GDAL engine compiled to WebAssembly, so it never leaves your computer.
XLSX is the modern Microsoft Excel workbook format.
CSV is the universal spreadsheet exchange format: rows of plain-text values that open in Excel, Google Sheets or any text editor.
Yes. Output defaults to EPSG:4326 (WGS84 longitude/latitude). Enter any EPSG code, such as EPSG:3857, in the coordinate-system box to reproject on the way out.
