Convert CSV to Excel Online Free - CSV to XLSX

How to convert CSV to Excel online - free and no software needed

The CSV format is widely used to export data from ERP systems, CRMs, banks, e-commerce platforms and any software that allows report exports. However, opening a CSV directly in Excel sometimes results in messy data, especially when the delimiter or encoding is not detected correctly. This tool solves that: you choose the delimiter and encoding, and the resulting .xlsx file opens perfectly formatted.

Automatic delimiter detection analyzes the first few lines of the file and identifies which character (comma, semicolon, tab or pipe) is being used as a delimiter. This works well for most files. When the result is not correct, select the delimiter manually.

The encoding option is important for files generated by older systems that use Latin-1 (ISO-8859-1) instead of UTF-8. Selecting the wrong encoding generates strange characters. If that happens, switch the encoding option and try again.

All processing happens in your browser - the CSV file is never sent to any server. The resulting file is downloaded as .xlsx ready to open in Excel, LibreOffice or Google Sheets.