XLSX to CSV Converter
Convert Excel .xlsx files to CSV — free, private, and instant in your browser.
Extract CSV data from modern Excel .xlsx workbooks without opening Excel. Drop the file in, pick which sheet you want — or export every sheet at once as a ZIP of CSVs — and choose the delimiter and encoding the receiving system expects.
Formulas are exported as their calculated values and dates as displayed text, so the CSV matches what you see in the spreadsheet, and the whole conversion runs locally in your browser. That matters when the workbook holds payroll, customer, or other data you should not upload to a random converter site.
This page accepts .xlsx only. For legacy .xls files use the XLS to CSV Converter, or the Excel to CSV Converter linked below, which accepts both formats.
Drop your file here or browse from your device
Accepts XLSX. Maximum input: 10 MiB. Files above this hard limit are rejected before local processing.
How to Convert
- Upload your .xlsx file or drag it onto the page
- Pick the sheet to convert if the workbook has more than one
- Choose your delimiter and encoding options
- Download one sheet as CSV, or all sheets together as one ZIP archive
Features
- Reads modern Excel .xlsx workbooks
- Sheet selector for multi-sheet workbooks
- Choose the delimiter (comma, tab, semicolon, pipe)
- Select output encoding (UTF-8, UTF-8 BOM, Latin-1)
- Download every sheet together in one ZIP archive
- Runs entirely in your browser — files never leave your device
Use Cases
- Extract .xlsx data for import into a database or CRM
- Convert an Excel workbook into a universal CSV format
- Prepare spreadsheet data for scripts and data pipelines
Frequently Asked Questions
Does this handle multi-sheet .xlsx workbooks?
Yes. Use the sheet selector to choose one sheet, or download one ZIP archive containing a separate CSV file for every sheet.
What happens to Excel formulas?
Formulas are exported as their calculated values, so the CSV contains the results rather than the formula text.
Can I pick the delimiter and encoding?
Yes. Export with a comma, tab, semicolon, or pipe delimiter and UTF-8, UTF-8 with BOM, or Latin-1 encoding.
Is my file uploaded to a server?
Never. The conversion runs locally in your browser, so your data stays private and works offline.
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