Documents
CSV XLSX
Convert CSV to XLSX free. No signup. Files deleted after 1 hour.
Max 50MB5 conversions/hourView Basic and Pro plans →
About CSV to XLSX
Convert a CSV file to an Excel (.xlsx) workbook so it opens cleanly with the right column types instead of Excel's import wizard. Auto-detects numbers, dates, and booleans.
Frequently asked questions
What delimiter is expected?
Comma by default. The tool also detects tab and semicolon automatically; you can override in the options.
Will leading zeros be preserved?
Yes, columns that look like ZIP codes or product SKUs are formatted as text to keep the zeros.