FileToastCSV to Excel
Convert CSV rows to an XLSX workbook while preserving leading zeros as text.
How to use CSV to Excel
- Choose a file (CSV / TSV) from your device.
- Check your selected input before processing.
- Run the tool, inspect the result, and download your output.
What this tool does
Convert CSV rows to an XLSX workbook while preserving leading zeros as text. Cells are written as text to preserve identifiers and prevent formula execution. Numeric calculations may require converting cells to numbers in Excel.
Questions about CSV to Excel
Are my files uploaded?
This tool processes files in your browser. File contents are not uploaded to FileToast. Downloads stay wherever you save them.
Will leading zeros survive conversion?
Values are preserved as text so identifiers such as 00123 keep their leading zeros.
Will CSV values become spreadsheet formulas?
The conversion preserves CSV cell values as text rather than evaluating them as formulas.
What are the file and processing limits?
Up to 50 MB per file. Large or complex files can exceed your device’s or the converter’s capacity. Cells are written as text to preserve identifiers and prevent formula execution. Numeric calculations may require converting cells to numbers in Excel.