Excel to CSV Converter
Excel to CSV Converter reads .xlsx spreadsheets and exports data as clean CSV files. Choose which sheet to convert and download the result. All processing happens in your browser — no upload.
Last updated: July 2026
An Excel to CSV converter reads .xlsx files and exports each sheet as comma-separated values. Pick a specific sheet or convert all. It runs entirely in your browser using a lightweight XLSX parser; your spreadsheet never leaves your device.
🔒 The Excel file is read entirely in your browser — nothing is uploaded.
How to use Excel to CSV Converter
- Choose an Excel (.xlsx) file.
- Pick which sheet to convert (or leave as default).
- Click Convert and download the CSV file.
Frequently asked questions
Which Excel formats are supported?
.xlsx files (Office Open XML). Older .xls files are not supported — open them in Excel first and save as .xlsx.
Are formulas evaluated?
Only the cell values are read; formulas are not evaluated. Open the file in Excel first to calculate, then convert.
Is my file uploaded?
No — the XLSX file is read entirely in your browser.
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