Excel to CSV
.xlsx → CSV
What is Excel to CSV?
Open an Excel file (.xlsx, .xls, or OpenDocument .ods) in your browser and convert any sheet into a CSV. Multi-sheet workbooks appear as tabs so you can pick the right one; delimiter can be comma, semicolon, or tab. All parsing happens locally — no upload to a third-party service.
How do I use Excel to CSV?
- Drop an Excel / ODS file onto the upload zone.
- If there are multiple sheets, pick the one you want.
- Choose a delimiter.
- Copy or download the CSV.
When should I use Excel to CSV?
Excel to CSV makes spreadsheets portable to text-based pipelines. For the opposite conversion (CSV to Excel), use CSV to Excel. For extracting data as JSON instead, convert to CSV first and then use CSV ↔ JSON.
Does it support .xlsx and .xls?
Both — modern .xlsx (Office 2007+) and legacy .xls (Office 2003). Each worksheet becomes a separate CSV; pick which ones to export.
Will it preserve formulas?
No. CSV is values-only, so formulas are evaluated to their current result. For formula-bearing exports, keep .xlsx.
What about dates and numbers?
Dates are formatted ISO 8601 (YYYY-MM-DD) by default; toggle the format picker for US/EU / custom styles. Numbers keep their precision.
Is my file uploaded anywhere?
No. Everything runs in your browser. Your files never leave your device, and there is no server component for this tool.